Twenty five properties that the Government of Canada considered selling in 2007.

1. Asticou Centre - 241 Boulevard de la Cite-des-Jeunes. The Asticou Centre is a public service training centre in Hull, Quebec, built on a 64 acre parcel of land.
2. Constitution Building - 305 Rideau Street, Ottawa.
3. East Memorial Building - 284 Wellington Street, Ottawa.
4. Gatineau Preservation Centre - 625 Boulevard du Carrefour.
5. Lester B. Pearson Building - 125 Sussex Drive, Ottawa.
6. Library and Archives Canada - 395 Wellington Street, Ottawa.
7. Lorne Building - 90 Elgin Street, Ottawa.
8. Major General G.R. Pearkes Building - 101 Colonel By Drive, Ottawa.(Update: 10,000 Department of National Defence employees will be relocated to the former Nortel campus at 3500 Carling Avenue in Ottawa. Coincidentally, the Rideau Centre shopping mall across the street from 101 Colonel By was Federal property, and the National Capital Commission sold the Mackenzie King Bridge to the City of Ottawa in 1995.)
9. National Printing Bureau, 45 Sacre-Coeur Boulevard, Gatineau Quebec.
10. Place du Portage - Phase 1 & 2 - 50 Victoria Street-located in the Hull sector of Gatineau, Quebec.
11. Place du Portage - Phase 111 - 11 Laurier Street, Hull.
12. Place du Portage - Phase 1V - 140 Promenade du Portage, Hull.
13. Plouffe Park (includes dome) - 1010 Somerset Street, Ottawa. (Update: According to the Canadian Environmental Assessment Agency website, in 2012 the warehouse will be demolished "in order to make use of the site or dispose of the land.") 
14. RCMP HQ and Trailers - 1200 Vanier Parkway, Ottawa.(Update: RCMP staff are moving to the JDS Uniphase campus at 3000 Merivale Road in Ottawa.)
15. Sir Charles Tupper Building - 2720 Riverside Drive, Ottawa.
16. Sir John Carling Building - 930 Carling Avenue. Ottawa.( Update:The building is now vacant, and will soon be bulldozed.)
17. Sir William Logan Building - 580 Booth Street, Ottawa.
18. Skyline Tower 1 to V11 - 1400 Merivale Road, Ottawa.
19. Taxation Data Centre - 875 Heron Road, Ottawa.
20. Temporary Building Site # 8 at Prince of Wales Drive, Ottawa.
21. Thomas D'Arcy McGee Building - 90 Sparks Street in Ottawa. 
22. Tunney's Pasture Complex - Scott Street, Ottawa. 
23. Wellington Building - 180 Wellington Street, Ottawa.
24. West Memorial Building - 344 Wellington Street, Ottawa.
25. 111 Sussex Complex - 111 Sussex Drive, Ottawa.( In 1958, Princess Margaret officially opened the building. Canadian architect Moshe Safdie added a modern extension to "Green Island" in 1988.)

(From: An Ottawa Citizen newspaper article, February 21, 2007).
The former Ottawa City Hall is now called "The John G. Diefenbaker Building" (Bytown Pavilion). The photos of 111 Sussex were taken by Simon Pulsifer in May 2005, and posted on Wikipedia.

The Taxation Data Centre property at 875 Heron Road in Ottawa encompasses 150 acres of land. (From: "The 1992 Federal Directory of Real Property"):