Federal office buildings in Ottawa - Gatineau (Ontario part).

356 structures with an office use and 3,434,365 m² of recorded floor area, held by the federal government. This is the federal holding in Ottawa - Gatineau (Ontario part), not the Ottawa - Gatineau (Ontario part) office market.

Office structures356

Recorded floor area3,434,365 m²

Crown owned234

Leased by the Crown122

Median year built1964

Office use only159

Every federal office building in Ottawa - Gatineau (Ontario part)

Ranked by recorded floor area. Condition is the custodian’s own federal rating, not a commercial class, and is absent on many structures.

Building	Place	Floor area	Built	Condition	Tenure	Custodian
C.D. Howe Building 240 Sparks Street and 235 Queen Street	Ottawa, Ontario	95,707 m²	1977	Fair	Crown Owned	Public Services and Procurement Canada
National Headquarters 1941 Ogilvie Rd.	Ottawa, Ontario	80,993 m²	1994	Fair	Crown Owned	Canadian Security Intelligence Service
Major-General G. R. Pearkes Building 101 Colonel By Drive, Ottawa, Ontario, K1A 0K2	Ottawa, Ontario	74,428 m²	1972	Fair	Crown Owned	Public Services and Procurement Canada
M.J. Nadon Building 73 Leikin Drive	Ottawa, Ontario	72,782 m²	2000	Good	Lease Purchase	Public Services and Procurement Canada
Lester B. Pearson Building 125 Sussex Drive	Ottawa, Ontario	65,253 m²	1972	Poor	Crown Owned	Public Services and Procurement Canada
Canada Post Towers Riverside & Heron Road	Ottawa, Ontario	64,899 m²	1993	Poor	Crown Owned	Canada Post
Jean Talon Building #5 170 Tunney's Pasture Driveway	Ottawa, Ontario	61,173 m²	1979	Critical	Crown Owned	Public Services and Procurement Canada
James Michael Flaherty Building 90 Elgin Street	Ottawa, Ontario	52,779 m²	2014	Good	Lease Purchase	Public Services and Procurement Canada
Place de Ville C 330 Sparks Street	Ottawa, Ontario	51,297 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Carling Campus - Building No. 5 3500 Carling Avenue	Ottawa, Ontario	44,502 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
Place Export Canada 150 Slater Street	Ottawa, Ontario	42,248 m²	—	—	Lease or Licence	Export Development Canada
R.H. Coats Building #1 100 Tunney's Pasture Driveway	Ottawa, Ontario	40,788 m²	1974	Fair	Crown Owned	Public Services and Procurement Canada
Carling Campus - Buildings 8 & 9 3500 Carling Avenue	Ottawa, Ontario	39,598 m²	1996	Good	Crown Owned	National Capital Commission
Statistics Canada Main Building #3 150 Tunney's Pasture Driveway	Ottawa, Ontario	39,247 m²	1952	Fair	Crown Owned	Public Services and Procurement Canada
Centennial Towers 200 Kent Street	Ottawa, Ontario	38,700 m²	—	—	Lease or Licence	Public Services and Procurement Canada
C-1990 Building 700 Montreal Rd	Ottawa, Ontario	38,669 m²	—	Good	Lease Purchase	Canada Mortgage and Housing Corporation
L'Esplanade Laurier - West Tower 300 Laurier Avenue, Ottawa, Ontario, K1P 6E3	Ottawa, Ontario	38,659 m²	1975	Critical	Crown Owned	Public Services and Procurement Canada
Thomas D'Arcy McGee Building 90 Sparks Street	Ottawa, Ontario	38,274 m²	—	—	Lease or Licence	Public Services and Procurement Canada
L'Esplanade Laurier - East Tower 140 O'Connor Street	Ottawa, Ontario	37,989 m²	1975	Critical	Crown Owned	Public Services and Procurement Canada
Nicholson Building RCMP HQ 1200 Vanier Parkway, Ottawa, Ontario, K1A 0R2	Ottawa, Ontario	35,358 m²	1954	Critical	Crown Owned	Public Services and Procurement Canada
Centre Block (including underground services) and Peace Tower 111 Wellington Street, Ottawa, Ontario, K1A 0A9	Ottawa, Ontario	34,704 m²	1920	Good	Crown Owned	Public Services and Procurement Canada
M-55 (J.E. Brown) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	33,957 m²	1974	Fair	Crown Owned	National Research Council Canada
Sir William Logan Building 580 Booth Street	Ottawa, Ontario	33,722 m²	1974	Fair	Crown Owned	Public Services and Procurement Canada
Jeanne Mance Building #19 200 Eglantine Driveway	Ottawa, Ontario	32,708 m²	1970	Poor	Crown Owned	Public Services and Procurement Canada
269 Laurier Avenue West	Ottawa, Ontario	32,206 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Carling Campus - Buildings 6 & 7 3500 Carling Avenue	Ottawa, Ontario	31,524 m²	1996	Good	Crown Owned	National Capital Commission
Plaza 234 234 Laurier Avenue West	Ottawa, Ontario	31,279 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Sir Charles Tupper Building 2720 Riverside Drive	Ottawa, Ontario	31,233 m²	1960	Critical	Crown Owned	Public Services and Procurement Canada
Wellington Building 180 Wellington Street	Ottawa, Ontario	31,139 m²	1938	Good	Crown Owned	Public Services and Procurement Canada
Carling Campus - Building No. 3 3500 Carling Avenue	Ottawa, Ontario	30,975 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
S-77 100 Sussex Drive, Ottawa, ON K1N 5A2	Ottawa, Ontario	30,730 m²	1930	Poor	Crown Owned	National Research Council Canada
John G. Diefenbaker Building 111 Sussex Drive, Ottawa, Ontario, K1N 5A1	Ottawa, Ontario	29,696 m²	1993	Good	Crown Owned	Public Services and Procurement Canada
M-50 (A.G.L. McNaughton) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	29,439 m²	1953	Good	Crown Owned	National Research Council Canada
Taxation Data Centre 875 Heron Road, Ottawa, Ontario, K1A 1B1	Ottawa, Ontario	28,507 m²	1970	Critical	Crown Owned	Public Services and Procurement Canada
Jean Edmonds South Tower 365 Laurier Avenue West	Ottawa, Ontario	28,423 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Canada Building 344 Slater Street	Ottawa, Ontario	28,127 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Sir Wilfrid Laurier Building 340 Laurier Avenue West	Ottawa, Ontario	27,742 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Taxation Headquarters 875 Heron Road, Ottawa, Ontario, K1A 1B1	Ottawa, Ontario	27,206 m²	1970	Critical	Crown Owned	Public Services and Procurement Canada
Jean Edmonds North Tower 300 Slater Street	Ottawa, Ontario	27,197 m²	—	—	Lease or Licence	Public Services and Procurement Canada
1625 Vanier Parkway	Ottawa, Ontario	26,918 m²	—	—	Lease or Licence	Public Services and Procurement Canada
East Memorial 284 Wellington Street, Ottawa, Ontario, K1A 0P4	Ottawa, Ontario	26,365 m²	1950	Good	Crown Owned	Public Services and Procurement Canada
131 Queen Street	Ottawa, Ontario	26,080 m²	—	—	Lease or Licence	Public Services and Procurement Canada
K.W. Neatby Building 960 Carling Ave.	Ottawa, Ontario	25,443 m²	1937	Fair	Crown Owned	Agriculture and Agri-Food Canada
Main Pathology Laboratory 3851 Fallowfield Rd.	Ottawa, Ontario	25,018 m²	1974	Critical	Crown Owned	Canadian Food Inspection Agency
Sun Life Financial Centre - East Tower 50 O'Connor Street	Ottawa, Ontario	24,989 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Place de Ville A 320 Queen Street	Ottawa, Ontario	24,731 m²	—	—	Lease or Licence	Public Services and Procurement Canada
181 Queen Street	Ottawa, Ontario	24,643 m²	2004	Good	Crown Owned	Public Services and Procurement Canada
Place Vanier A 333 River Road	Ottawa, Ontario	23,697 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Confederation Building 229 Wellington Street, Ottawa, Ontario, K1A 0H8	Ottawa, Ontario	23,488 m²	1932	Critical	Crown Owned	Public Services and Procurement Canada
Victoria Memorial Museum Building 240 McLeod Street	Ottawa, Ontario	23,356 m²	1905	Good	Crown Owned	Canadian Museum of Nature
West Memorial Building 344 Wellington Street, Ottawa, Ontario, K1A 0N3	Ottawa, Ontario	23,105 m²	1958	Critical	Crown Owned	Public Services and Procurement Canada
395 Terminal Avenue	Ottawa, Ontario	22,729 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Technical and Protective Operations Facility (TPOF) 1426 St. Joseph Blvd	Ottawa, Ontario	22,465 m²	1984	Good	Crown Owned	Royal Canadian Mounted Police
Brooke Claxton Building #9 70 Colombine Driveway	Ottawa, Ontario	21,164 m²	1964	Poor	Crown Owned	Public Services and Procurement Canada
Place Vanier B 355 North River Road	Ottawa, Ontario	21,046 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Skyline Complex (Towers 1 and 2) 1400 Merivale Road	Ottawa, Ontario	20,477 m²	—	—	Lease or Licence	Public Services and Procurement Canada
West Block 111 Wellington Street, Ottawa, Ontario, K1A 0A9	Ottawa, Ontario	20,298 m²	1859	Good	Crown Owned	Public Services and Procurement Canada
CanmetMINING 555 Booth Street	Ottawa, Ontario	19,893 m²	1955	Critical	Crown Owned	Natural Resources Canada
Place de Ville B 112 Kent Street	Ottawa, Ontario	19,642 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Hawthorne Commercial Centre - Building 300 Unit B - 3020 Hawthorne Road	Ottawa, Ontario	19,494 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Jackson Building 122 Bank Street	Ottawa, Ontario	19,482 m²	1920	Critical	Crown Owned	Public Services and Procurement Canada
Personnel Records Centre #18 161 Goldenrod Driveway	Ottawa, Ontario	19,074 m²	1965	Poor	Crown Owned	Public Services and Procurement Canada
Sir Richard Scott Building 191 Laurier Avenue West	Ottawa, Ontario	18,882 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Skyline Complex (Towers 3 and 4) 1285 and 1303 Baseline Road	Ottawa, Ontario	18,844 m²	—	—	Lease or Licence	Public Services and Procurement Canada
GC Building - Exhibition Commission - Warehouse 440 Coventry Road	Ottawa, Ontario	18,188 m²	1967	Poor	Crown Owned	Public Services and Procurement Canada
Chambers Building 40 Elgin Street	Ottawa, Ontario	17,622 m²	—	—	Lease or Licence	National Capital Commission
Canadian Building 219 Laurier Avenue West	Ottawa, Ontario	17,387 m²	—	—	Lease or Licence	Public Services and Procurement Canada
DND Data Centre #16 101 Goldenrod Driveway	Ottawa, Ontario	16,730 m²	1962	Poor	Crown Owned	Public Services and Procurement Canada
St. Andrew's Tower 275 Sparks Street, Ottawa, Ontario, K1R 7X9	Ottawa, Ontario	16,444 m²	1987	Good	Crown Owned	Public Services and Procurement Canada
Skyline Complex (Tower 7) 1341 Baseline Road	Ottawa, Ontario	16,227 m²	—	—	Lease or Licence	Public Services and Procurement Canada
125 Zaida Eddy Private	Ottawa, Ontario	16,096 m²	—	Good	Lease or Licence	Public Services and Procurement Canada
Urbandale Building 100 Metcalfe Street	Ottawa, Ontario	15,967 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Standard Life Centre I 280 Slater Street	Ottawa, Ontario	15,049 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Thornton Centre - Building 1 335 River Road, Ottawa, ON K1V 1C7	Ottawa, Ontario	15,000 m²	1953	Good	Crown Owned	Environment and Climate Change Canada
148-152 Sparks Street 148-152 Sparks Street, Ottawa ON	Ottawa, Ontario	14,990 m²	1876	Good	Crown Owned	National Capital Commission
Enterprise Building 427 Laurier Avenue West	Ottawa, Ontario	14,670 m²	—	—	Lease or Licence	Public Services and Procurement Canada
405 Terminal Avenue	Ottawa, Ontario	14,410 m²	2017	Good	Lease or Licence	Public Services and Procurement Canada
A-1952 Building 700 Montreal Rd	Ottawa, Ontario	14,346 m²	1952	Good	Crown Owned	Canada Mortgage and Housing Corporation
Willet Building 2215 Gladwin Crescent	Ottawa, Ontario	14,276 m²	—	—	Lease or Licence	Public Services and Procurement Canada
180 Kent Street	Ottawa, Ontario	14,081 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Valour Building 151 Sparks Street, Ottawa, Ontario, K1P 5E3	Ottawa, Ontario	13,866 m²	1971	Fair	Crown Owned	Public Services and Procurement Canada
Justice Building 249 Wellington Street	Ottawa, Ontario	13,848 m²	1937	Poor	Crown Owned	Public Services and Procurement Canada
Canadian Police Information Centre 1200 Vanier Parkway, Ottawa, Ontario, K1A 0R2	Ottawa, Ontario	13,561 m²	1971	Fair	Crown Owned	Public Services and Procurement Canada
Connaught Building 555 MacKenzie Avenue, Ottawa, Ontario, K1A 0L5	Ottawa, Ontario	13,516 m²	1914	Fair	Crown Owned	Public Services and Procurement Canada
Vanier Building 222 Nepean Street	Ottawa, Ontario	13,223 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Heritage Place 155 Queen Street	Ottawa, Ontario	13,191 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Sir Leonard Tilley Building 719 Heron Road, Ottawa, Ontario, K1G 3Z4	Ottawa, Ontario	12,954 m²	1961	Poor	Crown Owned	Public Services and Procurement Canada
Carling Campus - Building No. 10 - West 3500 Carling Avenue	Ottawa, Ontario	12,794 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
Supreme Court 301 Wellington Street, Ottawa, Ontario, K1A 0H9	Ottawa, Ontario	12,631 m²	1938	Critical	Crown Owned	Public Services and Procurement Canada
99 Metcalfe 99 Metcalfe Street	Ottawa, Ontario	12,585 m²	—	—	Lease or Licence	Public Services and Procurement Canada
U-66 655 Levy Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	12,537 m²	1958	Fair	Crown Owned	Transport Canada
National Police Service 1200 Vanier Parkway, Ottawa, Ontario, K1A 0R2	Ottawa, Ontario	12,501 m²	1972	Poor	Crown Owned	Public Services and Procurement Canada
Bell Tower 160 Elgin Street	Ottawa, Ontario	12,284 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Albion Executive Tower 25 Nicholas Street	Ottawa, Ontario	12,271 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Leima Building 410 Laurier Avenue West	Ottawa, Ontario	12,133 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Coventry Square 295 Coventry Road	Ottawa, Ontario	12,067 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-36 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	12,036 m²	1957	Fair	Crown Owned	National Research Council Canada
285 Coventry Road	Ottawa, Ontario	11,945 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-58 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	11,855 m²	1965	Poor	Crown Owned	National Research Council Canada
Leomont Building Protected	Ottawa, Ontario	11,534 m²	—	—	Lease or Licence	Public Services and Procurement Canada
U-61 1920 Research Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	11,211 m²	1952	Fair	Crown Owned	Transport Canada
Kent Square Building 255 Albert Street	Ottawa, Ontario	11,099 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Blackburn Building 85 Sparks Street, Ottawa, Ontario, K1P 5A7	Ottawa, Ontario	11,091 m²	1908	Critical	Crown Owned	Public Services and Procurement Canada
M-12 (I.E. Puddington) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	11,090 m²	1950	Poor	Crown Owned	National Research Council Canada
2 Constellation Crescent	Ottawa, Ontario	11,047 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Administration Building C Ottawa 855 Brookfield Rd., Building C K1A 0B1	Ottawa, Ontario	10,591 m²	1986	Critical	Crown Owned	Canada Post
LaSalle Academy 373 Sussex Drive	Ottawa, Ontario	10,575 m²	1852	Critical	Crown Owned	Public Services and Procurement Canada
Mulligan Building 1800 Walkley Road, Ottawa, Ontario, K1A 0M5	Ottawa, Ontario	10,531 m²	1984	Fair	Crown Owned	Public Services and Procurement Canada
Ottawa Building B Admnistration Office 720 Heron Road	Ottawa, Ontario	10,208 m²	1959	Fair	Crown Owned	Canada Post
25 Fitzgerald Road	Ottawa, Ontario	10,178 m²	—	—	Lease or Licence	Public Services and Procurement Canada
1500 Bronson Avenue 1500 Bronson Avenue, Ottawa, Ontario, K1G 3J5	Ottawa, Ontario	10,120 m²	1961	Critical	Crown Owned	Public Services and Procurement Canada
M-32 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	10,097 m²	1941	Poor	Crown Owned	National Research Council Canada
2204 Walkley Road	Ottawa, Ontario	9,465 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Sixty Queen Building 60 Queen Street	Ottawa, Ontario	9,441 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Sir Leonard Tilley C Wing 719 Heron, Ottawa ,Ontario, K1G 3Z4	Ottawa, Ontario	9,129 m²	—	—	Crown Owned	Public Services and Procurement Canada
M-20 (R.F. Legget) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	9,055 m²	1953	Poor	Crown Owned	National Research Council Canada
Skyline Complex (Tower 5) 1305 Baseline Road	Ottawa, Ontario	8,768 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Carling Campus - Building No. 2 3500 Carling Avenue	Ottawa, Ontario	8,765 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
Carling Square, Tower II 785 Carling Avenue	Ottawa, Ontario	8,643 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Vanguard Building 171 Slater Street	Ottawa, Ontario	8,570 m²	—	—	Lease or Licence	Public Services and Procurement Canada
GC Building - 350 King Edward Avenue 350 King Edward Avenue, Ottawa, Ontario, K1A 0X1	Ottawa, Ontario	8,564 m²	1942	Fair	Crown Owned	Public Services and Procurement Canada
M-24 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	8,342 m²	1970	Critical	Crown Owned	National Research Council Canada
Carling Campus - Building No. 10 - East 3500 Carling Avenue	Ottawa, Ontario	8,192 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
M-54 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	8,165 m²	1969	Good	Crown Owned	National Research Council Canada
130 Colonnade Road	Ottawa, Ontario	8,157 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Metro Centre C 1030 Innes Road, Ottawa, Ontario, K1B 4S7	Ottawa, Ontario	7,937 m²	1972	Good	Lease or Licence	Canadian Heritage
Billings Bridge Office Tower 2323 Riverside Drive	Ottawa, Ontario	7,769 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Booth Administration Building 588 Booth Street, Ottawa, Ontario, K1R 7L2	Ottawa, Ontario	7,651 m²	1960	Poor	Crown Owned	Public Services and Procurement Canada
Sixty-Six Slater 66 Slater Street	Ottawa, Ontario	7,482 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Victoria Building 140 Wellington Street, Ottawa, Ontario, K1P 5A2	Ottawa, Ontario	7,380 m²	1928	Critical	Crown Owned	Public Services and Procurement Canada
Office of the Prime Minister and Privy Council 80 Wellington Street, Ottawa, Ontario, K1A 0A2	Ottawa, Ontario	7,149 m²	1883	Critical	Crown Owned	Public Services and Procurement Canada
The New Two Seventy Building 270 Albert Street	Ottawa, Ontario	7,113 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Place d'Orleans Shopping Centre 110 Place d'Orleans Drive	Ottawa, Ontario	7,097 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Standard Life Centre II 333 Laurier Avenue West	Ottawa, Ontario	7,054 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Pinecrest Office Park 2745 Iris Street	Ottawa, Ontario	7,041 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-10 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	6,736 m²	1950	Fair	Crown Owned	National Research Council Canada
1725 Woodward Drive	Ottawa, Ontario	6,523 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Holland Cross Tower B 1600 Scott Street	Ottawa, Ontario	6,430 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-19 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	6,308 m²	1954	Poor	Crown Owned	National Research Council Canada
U-89 2320 Lester Road, Ottawa, ON K1V 1S2	Ottawa, Ontario	6,206 m²	1976	Good	Crown Owned	Transport Canada
Fraser Building 130 Bentley Avenue	Ottawa, Ontario	6,065 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Graham Spry Building 250 Lanark Avenue	Ottawa, Ontario	5,816 m²	1977	Poor	Crown Owned	Public Services and Procurement Canada
M-2 (J.H. Parkin) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	5,737 m²	1940	Fair	Crown Owned	National Research Council Canada
Queensway Corporate Campus Phase III 4200 Labelle Street	Ottawa, Ontario	5,480 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Laboratory Services 960 Carling Ave.	Ottawa, Ontario	5,347 m²	1956	Fair	Crown Owned	Agriculture and Agri-Food Canada
M-22 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	5,302 m²	1941	Poor	Crown Owned	National Research Council Canada
100 Sparks Street	Ottawa, Ontario	5,235 m²	1964	Critical	Crown Owned	Public Services and Procurement Canada
CATSA Headquarters 99 Bank St.	Ottawa, Ontario	5,219 m²	—	—	Lease or Licence	Canadian Air Transport Security Authority
360 Lisgar Building 360 Lisgar Street	Ottawa, Ontario	5,193 m²	—	—	Lease or Licence	Public Services and Procurement Canada
2200 Walkley Road	Ottawa, Ontario	5,148 m²	—	—	Lease or Licence	Public Services and Procurement Canada
1430 Blair Place	Ottawa, Ontario	5,100 m²	—	—	Lease or Licence	Public Services and Procurement Canada
100 Colonnade Road	Ottawa, Ontario	5,081 m²	—	—	Lease or Licence	Public Services and Procurement Canada
B-1970 Building 700 Montreal Rd	Ottawa, Ontario	5,046 m²	1971	Good	Crown Owned	Canada Mortgage and Housing Corporation
Hydro Ottawa (Electric) Building 56 Sparks Street	Ottawa, Ontario	5,000 m²	—	—	Lease or Licence	Public Services and Procurement Canada
250 Tremblay Road	Ottawa, Ontario	4,995 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Postal Station B 59 Sparks Street, Ottawa, Ontario, K1P 6E4	Ottawa, Ontario	4,938 m²	1938	Good	Crown Owned	Public Services and Procurement Canada
Sun Life Financial Centre - West Tower 99 Bank Street	Ottawa, Ontario	4,908 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Booth Building 165 Sparks Street	Ottawa, Ontario	4,899 m²	1914	Critical	Crown Owned	Public Services and Procurement Canada
M-59 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	4,858 m²	1976	Fair	Crown Owned	National Research Council Canada
Place Laurier 170 Laurier Avenue West	Ottawa, Ontario	4,853 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-7 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	4,732 m²	1941	Fair	Crown Owned	National Research Council Canada
2265 St. Laurent Boulevard	Ottawa, Ontario	4,679 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-35 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	4,533 m²	1962	Fair	Crown Owned	National Research Council Canada
M-60 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	4,518 m²	1957	Critical	Crown Owned	National Research Council Canada
Standards Building #4 151 Tunney's Pasture Driveway	Ottawa, Ontario	4,463 m²	1955	Critical	Crown Owned	Public Services and Procurement Canada
Abrams Building 2630 Sheffield Road	Ottawa, Ontario	4,412 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Holland Cross Tower A 11 Holland Avenue	Ottawa, Ontario	4,346 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Building 3 - General Office and Laboratory 1 Haanel Drive - Building 3	Ottawa, Ontario	4,278 m²	1968	Poor	Crown Owned	Natural Resources Canada
2655 Lancaster Road	Ottawa, Ontario	4,251 m²	—	—	Lease or Licence	Public Services and Procurement Canada
248 McArthur Avenue	Ottawa, Ontario	4,229 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Office Space 80 And 84 Bayview Road	Ottawa, Ontario	4,140 m²	1950	Poor	Crown Owned	National Capital Commission
M-4 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	4,106 m²	1942	Fair	Crown Owned	National Research Council Canada
Skyline Complex (Tower 6) 1339 Baseline Road	Ottawa, Ontario	4,034 m²	—	—	Lease or Licence	Public Services and Procurement Canada
30 Metcalfe Street	Ottawa, Ontario	4,027 m²	1964	Critical	Crown Owned	Public Services and Procurement Canada
Constitution Square - Tower I 360 Albert Street	Ottawa, Ontario	3,996 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-23A 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	3,994 m²	1952	Critical	Crown Owned	National Research Council Canada
159 Cleopatra Drive 159 Cleopatra Drive, Ottawa, Ontario, K2G 5X4	Ottawa, Ontario	3,849 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Building 2B Communications Research Centre Building 3701 Carling Ave., Hwy. 17; Areas 1 to 4 and 8	Ottawa, Ontario	3,786 m²	1958	Good	Crown Owned	Innovation, Science and Economic Development Canada
Metropolitan Centre 50 O'Connor St., 17th Floor	Ottawa, Ontario	3,729 m²	—	—	Lease or Licence	Canada Deposit Insurance Corporation
Manulife Place 55 Metcalfe Street	Ottawa, Ontario	3,720 m²	1987	—	Lease or Licence	Public Services and Procurement Canada
Birks Building 107 Sparks Street	Ottawa, Ontario	3,687 m²	1910	Critical	Crown Owned	Public Services and Procurement Canada
National Press Building 150 Wellington Street	Ottawa, Ontario	3,677 m²	1917	Critical	Crown Owned	Public Services and Procurement Canada
Capital Square 222 Queen Street	Ottawa, Ontario	3,669 m²	—	—	Lease or Licence	Public Services and Procurement Canada
141 Colonnade Road	Ottawa, Ontario	3,644 m²	—	—	Lease or Licence	Public Services and Procurement Canada
CFB Ottawa South Ottawa	Ottawa, Ontario	3,537 m²	1955	Poor	Crown Owned	National Defence
Sir John A. Macdonald Building 144 Wellington Street, Ottawa, Ontario, K1P 5T3	Ottawa, Ontario	3,498 m²	1930	Good	Crown Owned	Public Services and Procurement Canada
2300 St. Laurent Boulevard 2300 St.Laurent Boulevard, Ottawa, Ontario, K1G 6C4	Ottawa, Ontario	3,486 m²	—	—	Lease or Licence	Public Services and Procurement Canada
150 Slater Street	Ottawa, Ontario	3,454 m²	—	—	Lease or Licence	Public Services and Procurement Canada
M-14 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	3,361 m²	1942	Fair	Crown Owned	National Research Council Canada
GC Building - Exhibition Commission Office 440 Coventry Road, Ottawa, Ontario, K1K 2C4	Ottawa, Ontario	3,280 m²	1967	Poor	Crown Owned	Public Services and Procurement Canada
CFB Ottawa South Ottawa	Ottawa, Ontario	3,204 m²	1994	Critical	Crown Owned	National Defence
U-70 675 Levy Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	3,193 m²	1968	Good	Crown Owned	Transport Canada
Carling Campus - Pavilion 3500 Carling Avenue	Ottawa, Ontario	3,108 m²	1996	Good	Crown Owned	Public Services and Procurement Canada
M-38 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	3,030 m²	2017	Good	Crown Owned	National Research Council Canada
Constitution Square 700-350 Albert St.	Ottawa, Ontario	2,973 m²	—	—	Lease or Licence	Canadian Commercial Corporation
M-9 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	2,972 m²	1942	Poor	Crown Owned	National Research Council Canada
2171 Thurston Drive	Ottawa, Ontario	2,701 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Horticulture Building 960 Carling Ave.	Ottawa, Ontario	2,662 m²	1930	Good	Crown Owned	Agriculture and Agri-Food Canada
120 Colonnade Road	Ottawa, Ontario	2,626 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Central Chambers 46 Elgin Street	Ottawa, Ontario	2,447 m²	—	—	Lease or Licence	National Capital Commission
Cafeteria Ottawa 720 Heron Rd	Ottawa, Ontario	2,378 m²	1985	Fair	Crown Owned	Canada Post
2270 St. Laurent Boulevard	Ottawa, Ontario	2,363 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Hope Chambers Building 63 Sparks Street, Ottawa, Ontario, K1P 6E4	Ottawa, Ontario	2,331 m²	1910	Critical	Crown Owned	Public Services and Procurement Canada
U-100 1901 Research Road	Ottawa, Ontario	2,260 m²	1980	Poor	Crown Owned	Transport Canada
M-17 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	2,254 m²	1946	Good	Crown Owned	National Research Council Canada
1230 Old Innes Road	Ottawa, Ontario	2,210 m²	—	—	Lease or Licence	Public Services and Procurement Canada
RCMP Facility 1426 St Joseph Blvd	Ottawa, Ontario	2,200 m²	2020	Good	Crown Owned	Royal Canadian Mounted Police
Dover-Brouse-Slater Building 181-185 Sparks Street	Ottawa, Ontario	2,177 m²	1893	Critical	Crown Owned	Public Services and Procurement Canada
Pest Management Building 960 Carling Ave.	Ottawa, Ontario	2,167 m²	1920	Good	Crown Owned	Agriculture and Agri-Food Canada
Bank of Nova Scotia Building 125 Sparks Street, Ottawa, Ontario, K1P 5B5	Ottawa, Ontario	2,143 m²	1923	Good	Crown Owned	Public Services and Procurement Canada
Communications Research Centre Ottawa	Ottawa, Ontario	2,140 m²	2011	Poor	Crown Owned	Innovation, Science and Economic Development Canada
2130-40 Thurston Drive	Ottawa, Ontario	2,139 m²	—	—	Lease or Licence	Public Services and Procurement Canada
North Wing - Building 3 335 River Road, Ottawa, ON K1V 1C7	Ottawa, Ontario	2,116 m²	1996	Good	Crown Owned	Environment and Climate Change Canada
Building 1 - Central Experimental Farm (CEF) Protected	Ottawa, Ontario	1,972 m²	1905	Poor	Crown Owned	Agriculture and Agri-Food Canada
Occupational Health Unit Building 51 Chardon Driveway	Ottawa, Ontario	1,965 m²	1956	Poor	Crown Owned	Health Canada
Carling Campus- Services 3500 Carling Avenue	Ottawa, Ontario	1,964 m²	1996	Poor	Crown Owned	Public Services and Procurement Canada
Constitution Square - Tower III 340 Albert Street	Ottawa, Ontario	1,955 m²	—	—	Lease or Licence	Public Services and Procurement Canada
2220 Walkley road - Ottawa, ON 2220 Walkley Rd, Ottawa, ON	Ottawa, Ontario	1,943 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Minto Place 180 Kent St, 14th floor, Ottawa, ON, K1P 0B6	Ottawa, Ontario	1,932 m²	1991	Good	Lease or Licence	Defence Construction Canada
M-3 (F.R.Thurston) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,914 m²	1946	Poor	Crown Owned	National Research Council Canada
U-62 1935 Research Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	1,872 m²	1953	Fair	Crown Owned	Transport Canada
Constitution Square - Tower II 350 Albert Street	Ottawa, Ontario	1,843 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Billings Bridge Plaza 2277 Riverside Drive, Ottawa, Ontario, K1H 7X6	Ottawa, Ontario	1,831 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Michelle Comeau Learning Centre 960 Carling Ave.	Ottawa, Ontario	1,816 m²	1898	Good	Crown Owned	Agriculture and Agri-Food Canada
CFB Ottawa Ottawa	Ottawa, Ontario	1,785 m²	1958	Poor	Crown Owned	National Defence
Sir Leonard Tilley Annex 719 Heron Road, Ottawa, Ontario, K1G 3Z4	Ottawa, Ontario	1,782 m²	1992	Fair	Crown Owned	Public Services and Procurement Canada
Rideau Falls Lab 50 Sussex Drive (1 John Street), Ottawa, Ontario, K1M 1N3	Ottawa, Ontario	1,752 m²	1902	Good	Crown Owned	Public Services and Procurement Canada
1100 Polytek Street	Ottawa, Ontario	1,741 m²	—	Good	Lease or Licence	Public Services and Procurement Canada
M-16 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,733 m²	1946	Poor	Crown Owned	National Research Council Canada
1519 Startop Road 1519 Startop Road, Ottawa ON	Ottawa, Ontario	1,700 m²	2014	Good	Crown Owned	National Capital Commission
Rideauview Corporate Centre 885 Meadowlands Drive East	Ottawa, Ontario	1,688 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Cereal Building 960 Carling Ave.	Ottawa, Ontario	1,675 m²	1916	Fair	Crown Owned	Agriculture and Agri-Food Canada
U-66A 500 Aileron Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	1,618 m²	1983	Fair	Crown Owned	Transport Canada
Old United States Embassy 100 Wellington Street, Ottawa, Ontario, K1P 5T1	Ottawa, Ontario	1,602 m²	1932	Critical	Crown Owned	Public Services and Procurement Canada
M-11 (E.L. Smith) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,598 m²	2004	Good	Crown Owned	National Research Council Canada
Constitution Square 350 Albert St, 19th Floor, Ottawa, ON, K1A 0K3	Ottawa, Ontario	1,587 m²	—	Good	Lease or Licence	Defence Construction Canada
M-40 (W.G. Schneider) 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,557 m²	1950	Good	Crown Owned	National Research Council Canada
M-13 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,533 m²	1942	Fair	Crown Owned	National Research Council Canada
Building 3 - Central Experimental Farm (CEF) Protected	Ottawa, Ontario	1,530 m²	1955	Critical	Crown Owned	Agriculture and Agri-Food Canada
Communications Research Centre Ottawa	Ottawa, Ontario	1,525 m²	1981	Poor	Crown Owned	Innovation, Science and Economic Development Canada
Communications Research Centre Ottawa	Ottawa, Ontario	1,525 m²	1982	Poor	Crown Owned	Innovation, Science and Economic Development Canada
Howard Building 202 Sparks Street, Ottawa, Ontario, K1P 5C1	Ottawa, Ontario	1,468 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Arboreteum Building 960 Carling Ave.	Ottawa, Ontario	1,457 m²	1924	Good	Crown Owned	Agriculture and Agri-Food Canada
Saxe (Canada Life) Building 75 Sparks Street, Ottawa, Ontario, K1P 5A5	Ottawa, Ontario	1,335 m²	1910	Critical	Crown Owned	Public Services and Procurement Canada
M-46 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	1,298 m²	1962	Poor	Crown Owned	National Research Council Canada
GC Building - Central Heating Plant NDMC 1745 Alta Vista Drive, Ottawa, Ontario, X9X 9X9	Ottawa, Ontario	1,297 m²	1963	Poor	Crown Owned	Public Services and Procurement Canada
U-72 1950 Research Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	1,228 m²	2018	Good	Crown Owned	Transport Canada
Bate Building 109 Sparks Street, Ottawa, Ontario, K1P 5B5	Ottawa, Ontario	1,228 m²	1910	Critical	Crown Owned	Public Services and Procurement Canada
Canadian Police College (CPC) Site 1 Sandridge Rd	Ottawa, Ontario	1,224 m²	1952	Fair	Crown Owned	Royal Canadian Mounted Police
Office Space 3440 Richmond Road	Ottawa, Ontario	1,216 m²	1955	Good	Crown Owned	National Capital Commission
Nitrate Film Preservation Facility 3701 Carling Ave (Shirley's Bay campus)	Ottawa, Ontario	1,200 m²	2011	Good	Crown Owned	Innovation, Science and Economic Development Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	1,168 m²	1923	Critical	Crown Owned	National Defence
Sun Life Financial Centre 50 O'Connor St, Suite 1100	Ottawa, Ontario	1,157 m²	—	Unknown	Lease or Licence	Business Development Bank of Canada
Marshall Building 14 Metcalfe Street, Ottawa, Ontario, K1P 5L1	Ottawa, Ontario	1,099 m²	1890	Poor	Crown Owned	Public Services and Procurement Canada
FCC Kanata 1000-555 Legget Drive Tower A	Ottawa, Ontario	1,055 m²	—	Unknown	Lease or Licence	Farm Credit Canada
Finance Building 960 Carling Ave.	Ottawa, Ontario	1,044 m²	1920	Fair	Crown Owned	Agriculture and Agri-Food Canada
PrimeCorp Building 275 Bank Street, Ottawa, Ontario, K2P 2L6	Ottawa, Ontario	1,040 m²	—	—	Lease or Licence	Public Services and Procurement Canada
100 Murray Street	Ottawa, Ontario	1,013 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Auriga Corporate Centre 38 Auriga Drive	Ottawa, Ontario	986 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Service Building 960 Carling Ave.	Ottawa, Ontario	966 m²	1939	Fair	Crown Owned	Agriculture and Agri-Food Canada
Fisher Building 115 Sparks Street, Ottawa, Ontario, K1P 5B5	Ottawa, Ontario	936 m²	1898	Critical	Crown Owned	Public Services and Procurement Canada
75 Albert - 9th Floor 75 Albert St	Ottawa, Ontario	921 m²	—	Good	Lease or Licence	National Capital Commission
Technical and Protective Operations Facility (TPOF) Protected	Ottawa, Ontario	918 m²	2014	Good	Crown Owned	Royal Canadian Mounted Police
U-69 615 Levy Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	865 m²	1967	Poor	Crown Owned	Transport Canada
Canada's Four Corners Building 93 Sparks Street, Ottawa, Ontario, K1P 5B5	Ottawa, Ontario	842 m²	1871	Critical	Crown Owned	Public Services and Procurement Canada
M-27 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	839 m²	1956	Poor	Crown Owned	National Research Council Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	825 m²	2001	Good	Crown Owned	National Defence
CFS Leitrim Ottawa	Ottawa, Ontario	815 m²	1962	Fair	Crown Owned	National Defence
CFB Ottawa South Ottawa	Ottawa, Ontario	762 m²	1985	Critical	Crown Owned	National Defence
Livestock 3851 Fallowfield Rd.	Ottawa, Ontario	761 m²	1971	Critical	Crown Owned	Canadian Food Inspection Agency
Engineering Building 960 Carling Ave.	Ottawa, Ontario	723 m²	1904	Fair	Crown Owned	Agriculture and Agri-Food Canada
Heritage House 960 Carling Ave.	Ottawa, Ontario	717 m²	1900	Fair	Crown Owned	Agriculture and Agri-Food Canada
Service Building 960 Carling Ave.	Ottawa, Ontario	711 m²	1936	Good	Crown Owned	Agriculture and Agri-Food Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	703 m²	2011	Fair	Crown Owned	National Defence
80 Elgin Street - Office Building 80 Elgin Street, Ottawa ON	Ottawa, Ontario	697 m²	1970	Fair	Crown Owned	National Capital Commission
1867 Merivale Road	Ottawa, Ontario	696 m²	—	—	Lease or Licence	Public Services and Procurement Canada
CFB Ottawa South Ottawa	Ottawa, Ontario	670 m²	2010	Good	Crown Owned	National Defence
Office Space 457, 457 A And 459 Sussex Drive	Ottawa, Ontario	668 m²	1850	Fair	Crown Owned	National Capital Commission
Seed Biology 960 Carling Ave.	Ottawa, Ontario	660 m²	1950	Good	Crown Owned	Agriculture and Agri-Food Canada
House of Norcano Building 69 Sparks Street	Ottawa, Ontario	654 m²	1920	Critical	Crown Owned	Public Services and Procurement Canada
Manulife Place 1210 - 55 Metcalfe Street	Ottawa, Ontario	648 m²	—	—	Lease or Licence	Federal Bridge Corporation Limited
Building 2 - Central Experimental Farm (CEF) Protected	Ottawa, Ontario	647 m²	1911	Poor	Crown Owned	Agriculture and Agri-Food Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	600 m²	1999	Good	Crown Owned	National Defence
U-91 2320 Lester Road, Ottawa, ON K1V 1S2	Ottawa, Ontario	559 m²	1981	Poor	Crown Owned	Transport Canada
Service Building 960 Carling Ave.	Ottawa, Ontario	557 m²	1922	Good	Crown Owned	Agriculture and Agri-Food Canada
Heritage House - CCSI 960 Carling Ave.	Ottawa, Ontario	556 m²	1900	Fair	Crown Owned	Agriculture and Agri-Food Canada
Cenotaph 3500 Carling Avenue	Ottawa, Ontario	550 m²	2017	Good	Crown Owned	National Capital Commission
150 Metcalfe Street 150 Metcalfe Street, Ottawa, Ontario, K2P 1P1	Ottawa, Ontario	549 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Old United States Embassy Annex - Union E 128 Wellington Street, Ottawa, Ontario, K1P 5T1	Ottawa, Ontario	535 m²	1888	Critical	Crown Owned	Public Services and Procurement Canada
Ottawa Research and Development Centre 960 Carling Ave.	Ottawa, Ontario	528 m²	1950	Good	Crown Owned	Agriculture and Agri-Food Canada
Carling Campus - Ottawa-Carleton Wildlife Centre 3500 Carling Avenue	Ottawa, Ontario	510 m²	1996	Good	Crown Owned	National Capital Commission
Canada Aviation and Space Museum 11 Aviation Parkway	Ottawa, Ontario	477 m²	1974	Fair	Crown Owned	Canada Science and Technology Museum
Chapel Street Visitor Centre 283 Chapel Street	Ottawa, Ontario	472 m²	1938	Fair	Crown Owned	Parks Canada Agency
275 Slater Street	Ottawa, Ontario	469 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Nelms Building 67 Sparks Street	Ottawa, Ontario	455 m²	1870	Poor	Crown Owned	Public Services and Procurement Canada
Ottawa West 1010-515 Legget Drive	Ottawa, Ontario	454 m²	—	—	Lease or Licence	Business Development Bank of Canada
1130 Morrison Drive	Ottawa, Ontario	448 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Building 12A - Trailer 1 Haanel Drive - Building 12A	Ottawa, Ontario	424 m²	2001	Critical	Crown Owned	Natural Resources Canada
FCC Ottawa 1460-100 Queen Street	Ottawa, Ontario	419 m²	2024	—	Lease or Licence	Farm Credit Canada
M-1B 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	419 m²	1900	Fair	Crown Owned	National Research Council Canada
Macdonald-Cartier Int'l Airport - New Terminal Building 1000 Airport Parkway	Ottawa, Ontario	413 m²	—	—	Lease or Licence	Public Services and Procurement Canada
Building 5A - Trailer 1 Haanel Drive - Building 5A	Ottawa, Ontario	402 m²	2001	Critical	Crown Owned	Natural Resources Canada
Office Space 136 Street Patrick Street	Ottawa, Ontario	383 m²	1986	Fair	Crown Owned	National Capital Commission
555 Legget Drive	Ottawa, Ontario	366 m²	—	—	Lease or Licence	Public Services and Procurement Canada
U-70A 675 Levy Private, Ottawa, ON K1V 2B1	Ottawa, Ontario	362 m²	1968	Fair	Crown Owned	Transport Canada
Building 1 Reception 3701 Carling Ave., Hwy. 17; Areas 1 to 4 and 8	Ottawa, Ontario	329 m²	1961	Fair	Crown Owned	Innovation, Science and Economic Development Canada
Office Space 225 Slack Road	Ottawa, Ontario	325 m²	1964	Good	Crown Owned	National Capital Commission
Communications Research Centre Ottawa	Ottawa, Ontario	314 m²	1954	Poor	Crown Owned	Innovation, Science and Economic Development Canada
Office Space 3448 Richmond Road	Ottawa, Ontario	311 m²	1870	Fair	Crown Owned	National Capital Commission
Carling Campus - Guardhouse #2 3500 Carling Avenue	Ottawa, Ontario	285 m²	2017	Fair	Crown Owned	Public Services and Procurement Canada
O'Brien Building 65 Sparks Street	Ottawa, Ontario	281 m²	1875	Fair	Crown Owned	Public Services and Procurement Canada
South Wing Building 335 RIVER ROAD, OTTAWA, ON	Ottawa, Ontario	278 m²	2018	Good	Lease or Licence	Public Services and Procurement Canada
Ottawa Research and Development Centre 960 Carling Ave.	Ottawa, Ontario	250 m²	1915	Good	Crown Owned	Agriculture and Agri-Food Canada
Office Space 10 A And B York Street	Ottawa, Ontario	239 m²	1920	Fair	Crown Owned	National Capital Commission
Connaught Rifle Range Ottawa	Ottawa, Ontario	228 m²	1989	Critical	Crown Owned	National Defence
Connaught Rifle Range Ottawa	Ottawa, Ontario	228 m²	1939	Poor	Crown Owned	National Defence
Farm Office 3851 Fallowfield Rd.	Ottawa, Ontario	211 m²	1985	Critical	Crown Owned	Canadian Food Inspection Agency
Service Building 960 Carling Ave.	Ottawa, Ontario	209 m²	1956	Good	Crown Owned	Agriculture and Agri-Food Canada
Lester B. Pearson Sussex Pavilion 125 Sussex Drive	Ottawa, Ontario	208 m²	2021	Good	Crown Owned	Public Services and Procurement Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	202 m²	2004	Good	Crown Owned	National Defence
Office Space 62 John Street	Ottawa, Ontario	195 m²	1831	Good	Crown Owned	National Capital Commission
Constitution Square 350 Albert St, 17th Floor, Ottawa, ON K1A 0K3	Ottawa, Ontario	192 m²	—	Good	Lease or Licence	Defence Construction Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	186 m²	1998	Fair	Crown Owned	National Defence
Carling Campus - Guardhouse #1 3500 Carling Avenue	Ottawa, Ontario	180 m²	2017	Fair	Crown Owned	Public Services and Procurement Canada
M-1 1200 Montreal Road, Ottawa, ON K1A 0R6	Ottawa, Ontario	166 m²	1992	Poor	Crown Owned	National Research Council Canada
Greenbelt Research Farm 1740 Woodroffe Avenue	Ottawa, Ontario	157 m²	1968	Fair	Crown Owned	National Capital Commission
Storage (Fletcher Wildlife) 960 Carling Ave.	Ottawa, Ontario	140 m²	1959	Fair	Crown Owned	Agriculture and Agri-Food Canada
Building 1B - Trailer 1 Haanel Drive - Building 1B	Ottawa, Ontario	138 m²	1994	Critical	Crown Owned	Natural Resources Canada
Building 2B - Trailer 1 Haanel Drive - Building 2B	Ottawa, Ontario	136 m²	2001	Poor	Crown Owned	Natural Resources Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	135 m²	1987	Fair	Crown Owned	National Defence
Connaught Rifle Range Ottawa	Ottawa, Ontario	135 m²	1995	Fair	Crown Owned	National Defence
Technical and Protective Operations Facility (TPOF) Protected	Ottawa, Ontario	132 m²	2013	Good	Crown Owned	Royal Canadian Mounted Police
CFB Ottawa South Ottawa	Ottawa, Ontario	122 m²	1948	Fair	Crown Owned	National Defence
Building 3A - Trailer 1 Haanel Drive - Building 3A	Ottawa, Ontario	114 m²	1984	Critical	Crown Owned	Natural Resources Canada
Lester B. Pearson King Edward Pavilion 125 Sussex Drive	Ottawa, Ontario	101 m²	2021	Good	Crown Owned	Public Services and Procurement Canada
Office/Storage 960 Carling Ave.	Ottawa, Ontario	93 m²	1945	Fair	Crown Owned	Agriculture and Agri-Food Canada
RCMP Facility 73 Leikin Dr	Ottawa, Ontario	89 m²	2012	Good	Crown Owned	Public Services and Procurement Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	84 m²	2011	Good	Crown Owned	National Defence
Connaught Rifle Range Ottawa	Ottawa, Ontario	82 m²	2010	Good	Crown Owned	National Defence
Guardhouse #3 3500 Carling Avenue	Ottawa, Ontario	75 m²	2017	Good	Crown Owned	National Capital Commission
Connaught Rifle Range Ottawa	Ottawa, Ontario	70 m²	2008	Good	Crown Owned	National Defence
Connaught Rifle Range Ottawa	Ottawa, Ontario	70 m²	2006	Good	Crown Owned	National Defence
Connaught Rifle Range Ottawa	Ottawa, Ontario	70 m²	2006	Fair	Crown Owned	National Defence
Building 8A - Trailer 1 Haanel Drive - Building 8A	Ottawa, Ontario	70 m²	1990	Critical	Crown Owned	Natural Resources Canada
Building 2D - Trailer 1 Haanel Drive - Building 2D	Ottawa, Ontario	67 m²	1992	Critical	Crown Owned	Natural Resources Canada
Economy Parking Lot Office 1000 Airport Parkway Private	Ottawa, Ontario	66 m²	1989	Fair	Crown Owned	Transport Canada
NRC-IRAP Ottawa Building 94, 3701 Carling Avenue, Ottawa, ON K2H 8S2	Ottawa, Ontario	54 m²	1999	Good	Crown Owned	National Research Council Canada
Building 19D - Trailer - PEER Building 1 Haanel Drive	Ottawa, Ontario	51 m²	1989	Good	Crown Owned	Natural Resources Canada
Main Parking Lot/Two Booths/Office And Shelter Airport Parkway Private	Ottawa, Ontario	46 m²	1987	Fair	Crown Owned	Transport Canada
RCMP Facility 415 Nicolls Island Rd	Ottawa, Ontario	30 m²	1969	Fair	Crown Owned	Royal Canadian Mounted Police
RCMP Guardhouse 1200 Vanier Parkway, Ottawa, Ontario, K1A 0R2	Ottawa, Ontario	29 m²	1967	Fair	Crown Owned	Public Services and Procurement Canada
NRC-IRAP Ottawa Room C272, Bldg C - Algonquin College, 215 Adjidjàk Private, Ottawa, ON K2G 1V8	Ottawa, Ontario	28 m²	—	Unknown	Lease or Licence	National Research Council Canada
NRC-IRAP Ottawa 7 Bayview Road, Ottawa, ON K1Y 2C5	Ottawa, Ontario	23 m²	—	Good	Lease or Licence	National Research Council Canada
Connaught Rifle Range Ottawa	Ottawa, Ontario	22 m²	1994	Fair	Crown Owned	National Defence
RCMP Facility 73 Leikin Dr	Ottawa, Ontario	19 m²	2012	Good	Crown Owned	Public Services and Procurement Canada
Ottawa Head Office East Tower 2701 Riverside Drive Ottawa ON K1A0B1	Ottawa, Ontario	1 m²	1993	Good	Crown Owned	Canada Post

Recorded condition

96 of these structures are rated Poor or Critical by their custodian. Condition is absent on many records and is a federal stewardship measure.

Questions

Scope of this page.

How many federal office buildings are in Ottawa - Gatineau (Ontario part)?

356 structures with an office use, 3,434,365 m² of recorded floor area. 234 are Crown owned and 122 are held on a lease or licence.

Does this show the whole office market here?

No. These are federal holdings only. Privately owned office buildings are not in this source, so the totals here describe one occupier.

Source: Directory of Federal Real Property, Treasury Board of Canada Secretariat, retrieved 2026-09-23. Contains information licensed under the Open Government Licence – Canada.

Boundary: This is the federal government’s own property holding, not the Canadian office market. It excludes every privately owned office building, and the Directory records condition on a federal assessment scale rather than a market classification. It is not a rent, vacancy or availability source.

Privacy: Official_Contact_Name, Official_Contact_Telephone and Official_Contact_Email are present in the source and are never read. The custodian named here is a federal department or Crown corporation.

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