This is what happens, when Canadian federal properties are privatized.

Central Experimental Farm, Ottawa.

A 1988 Privy Council Order-in-Council. The Municipality of Ottawa sold the 91 acres of land to a developer who created the high-density "Central Park" housing development.

A 1975 front page Ottawa Journal newspaper article.  Federal Minister of Agriculture Eugene Whelan  refused to sell any Farm land, despite pressure from the Chairman of the National Capital Commission Douglas Fullerton.

The Montgomery's Tavern National Historic Site of Canada, 2384 Yonge Street, Toronto, Ontario -
Montgomery's Tavern became the Headquarters for William Lyon Mackenzie's "Upper Canada Rebellion." The building later became Postal Station K.

The former Canada Post building at 2384 Yonge Street. Parks Canada did not try to preserve the two-storey landmark. The photo is from flickr.com.
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The Chateau Laurier Hotel, Ottawa resembles a European medieval castle. The proposed addition to the hotel should be banned, because of guidelines outlined in the document "Rideau Canal National Historic Site-Principles for Good Waterfront Development": 2.) Conserve historic buildings and cultural heritage features. It is particularly important to conserve and reuse historic houses and cottages; lodges, mills, barns, fences and other cultural heritage features to preserve the landscape character of the Rideau Corridor. 4.) New buildings should be designed to complement the landscape character and architectural style of the surrounding area. Buildings should be in proportion to the size and frontage of the property to fit in with the surrounding built environment." The Rideau Canal was designated a UNESCO World Heritage Site in 2007.

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Kingston Penitentiary, Kingston ,Ontario - Three of the  walls that surround the former pen will be removed; guard towers will be preserved "if possible" and eleven limestone buildings are slated for demolition. High rise condominiums, townhouses, a hotel and commercial establishments will be constructed on the site.
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The Macdonald House Canadian Embassy, One Grosvenor Square, Mayfair, London, England - sold by Gordon Campbell a few years ago. Now demolished.
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Fairmont Hotel Macdonald, Edmonton Alberta - a 1953 addition, called "the box" was demolished in 1986.
Fairmont Fort Garry Hotel, Winnipeg, Manitoba - a residential tower was built on former hotel property.
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CBC parking lot, Toronto, Ontario
CBC parking lot, Vancouver, British Columbia
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The American Embassy, 490 Sussex Drive, Ottawa - The site where the building is located was a greenspace and a parking lot owned by the National Capital Commission. The architectural design of the Embassy would never be approved today, because the building looms over the ByWard Market, and the style of the Embassy does not conform to the style of nearby landmarks - the Parliament Buildings; the Connaught Building, 555 Mackenzie Avenue that resembles a castle; the Chateau Laurier Hotel and the Conference Centre on Rideau Street. At one time Sussex Drive was known as "Ottawa's Mile of History".
The American Embassy in Ottawa is similar to the William J. Clinton Museum and Library, 1200 President Clinton Avenue, Little Rock Arkansas. President Clinton attended the official opening of the American Embassy on Sussex Drive, Ottawa, which is sometimes called "the battleship". Did Bill Clinton participate in designing "the battleship"?
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 The Sir John Carling Building can be seen in the distance. The Carling building is gone, YouTube has several videos of the demolition, including slow motion and high-definition views. The National Capital Commission and several politicians want to see a new Civic Hospital built on the land. The noise and light pollution, helicopters landing on the roof, massive influx of cars and emergency vehicles and the disruption caused by construction will ruin Little Italy; Dow's Lake; the Dominion Observatory Campus and Commissioner's Park, which is sacred ground. The Ottawa Tulip Festival is one of the most popular tourist attractions in the City. The following politicians want to see a new hospital constructed on the green space:
Federal Environment Minister Catherine McKenna
Federal Minister of Heritage Melanie Joly
Ottawa Centre Member of Provincial Parliament Yasir Naqvi
Somerset Ward Ottawa politician Catherine McKenney - Catherine McKenney also approved the massive redevelopment of federal land at 933 Gladstone Avenue; the influx of high rise condominiums in Little Italy, and the huge redevelopment of government property at the Natural Resources Canada Booth Street property.

A politician who is opposed to a new Civic Hospital being built on Experimental Farm land:
Former Capital Ward City councillor and candidate for Mayor of Ottawa Clive Doucet.

A YouTube video called "Ottawa prepares to hand over Historic Federal Farm land to Corporate Developers" outlines the reasons why a new Civic Hospital should not be located on the Agriculture Canada land.
The government of Pierre Trudeau created a compendium with the images and descriptions of numerous government properties. For example: The former Energy, Mines and Resources campus, now called the Booth Street Complex: 

The Natural Resources Canada Booth Street Complex, Ottawa - 1983.

 The Pierre Trudeau government also:
---Refused to transfer Ottawa's Experimental Farm land to the National Capital Commission, a commercial Crown corporation that privatizes and leases government of Canada properties.

--Conducted an inventory of all Canadian National Railway real estate in 1980, when the CNR said they were creating a real estate subsidiary. That inventory included hotels, train stations; 100,000 acres of land; bridges; culverts; roundhouses; CN Towers in Toronto; Edmonton; Saskatoon and London, Ontario; warehouses, more...

---The Trudeau government documented how many properties Canada Post owned, which was 2,200, worth $2 Billion dollars in 1984, see the "1984 Report of the Auditor General of Canada" Chapter 13.

-- PM Pierre Trudeau tried to return Canadian Pacific Railway land to the people of Canada, see my blogs.

---Created a Crown corporation called "Harbourfront" after the government of Canada bought 100 acres of industrial waterfront land in Toronto. The land was supposed to be green space "for future generations".

----A government of Canada official signed the" UN Convention for the Protection of Cultural and Natural Heritage"treaty in 1976. UNESCO was created to protect international cultural landmarks and landscapes that are threatened by war; redevelopment or neglect. Quebec City and Lunenburg,  Nova Scotia are already UNESCO World Heritage cities---I believe that Canada's lighthouses, and the Kingston Penitentiary and nearby buildings should be protected by UNESCO.

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Fisheries and Oceans Canada privatized their entire portfolio of lighthouses, 1,000. That includes Peggy's Cove and the Bonaventure Lighthouse, which can be seen in a YouTube video: Google "This Land is Your Land Canada (music video)" by The Travellers.

Building 55, Downsview Toronto, before.

Building 55 after.