Putting a monetary value on a Canadian government property is a kiss of death.

1.)   All of the infrastructure in Canada's National Parks - valued at $8.2 billion dollars not long ago.
2.)   Kingston Penitentiary - (1835-2013) -  $17 million.
3.)  Dominion Public Building, One Front Street West ,Toronto - sold a few years ago to Larco Investments.
4.)   Dow's Lake Parking Lot, Ottawa -$4 million dollars.
5.)   Prison for Women, Kingston Ontario - (1936-2008).
6.)   Moffatt Farm near Mooney's Bay, Ottawa - was classified by the City of Ottawa as waterfront, open space, green space and environmentally sensitive. The City wanted the 88-acre parcel to remain a green space and offered $400,000 dollars for the land.Their offer was rejected in 2002.
7.)   The Greenbelt, Ottawa - "The City of Ottawa has identified more than 13,700 acres of the Greenbelt, worth about $1.6 billion dollars that could be developed, and in their view, without damaging its overall integrity." (Greenbelt-Wikipedia.) Governing body is the National Capital Commission.
8.)  Natural Capital: The Economic Value of NCC Green Space - $5 billion dollars over 20 years.
9.)  A huge new prison will be constructed in Kingston, Ontario and "the complex would be populated from the consolidation of existing institutions"-
Piitsburgh
Joyceville
Warkworth
Kingston Penitentiary
Regional Treatment Centre
Millhaven. (Page 198/265, "A Roadmap to Strengthening Public Safety.")
Prisons that have outlived their usefulness will be decommissioned. Joyceville and Pittsburgh farmland could be worth $2 million dollars. (Page 208/265, "A Roadmap to Strengthening Public Safety".) Warkworth will be demolished, Kingston Penitentiary converted to a heritage site and Corrections Canada will maintain Millhaven.
10.)  Sir Leonard Tilley Building and Annex, 719 Heron Road, Ottawa. The building is valued at $45 million dollars. Vacant.

Stone Gables and St. Helen's are worth $17 million dollars according to the document "A Roadmap to Strengthening Public Safety" by Rob Sampson, page 208.  

"Let the Future Begin" 1997. The document is recommending the privatization of Government of Canada real estate including the CBC and Canada Post.
  Canada Post owned 2,200 buildings with a market value of  $1.4 billion dollars according to the 1984 Report of the Auditor General of Canada-Chapter 13-13.6.
. Also, Canadians have to pay "user fees" to enter our publicly-owned National Parks. And Parks Canada is considering the sale of highways, nature trails, culverts, bridges, tunnels, etc. in National Parks. People who live in Ontario are well aware of what happened when the taxpayer-funded Highway 407 was sold to a foreign country (Spain.)

Two Fraser Institute documents from the late 1990's. 

In 1980 the Department of Public Works was known as "The country's largest realtor". The Harry Hays Federal Building in Calgary, Alberta was privatized in 2007 and the owner is Larco Investments.
(This document is from a book at Library and Archives Canada on Wellington Street, Ottawa.)