The freehold of Southwark Council's Tooley Street headquarters has been put up for sale with a £150 million price tag.
Barnet and Chase Farm Hospitals NHS Trust is a late addition to the Sitematch London event on 6 November, when the trust hopes to meet developers.
Southwark Council has pledged to build some 1,000 new council homes by 2020, targeting under-used, vacant or currently problematic sites for the developments, which will be funded through other regeneration work.
London's public sector landowners want to meet housebuilders and retail occupiers in particular at next week's Sitematch London event.
The Metropolitan Police is planning to sell off a third of its property estate, including its Scotland Yard headquarters in Victoria, central London, to help save £500 million over coming years.
Department of Health official Matthew Kershaw has indicated that certain sites owned by a financially troubled NHS Trust should be sold off.
Contact details for key council officers have been added to the Sitematch London website, which also boasts an upgraded homepage.
The latest statistics on planning performance for London councils, released by the UK Statistics Authority, have been uploaded to Sitematch London.
Ealing Council has confirmed that it will push ahead with plans to apply for a compulsory purchase order (CPO) for the site of the former Empire Cinema in Uxbridge Road.
Supermarket Sainsbury's has agreed the purchase of 10 acres of the Sanofi site in Dagenham for the construction of a 5500 metre store and petrol station.