Surrey County Council has made more than £60 million selling land including school playing fields and care homes to property developers since 2015.
The deals were part of an £87.7 million sell-off of public assets by the cash-strapped local authority, with £31 million set to be reinvested by 2021 in "transformation projects" designed to save the council money.
Around half the sales have come since April 2016, when the government allowed local councils to use money raised by selling property to fund money-saving initiatives. Previously, such money could only be used for further property purchases.
By far the largest sale came in March 2017, when the council sold the former De Burgh School playing fields to developers London Square for £24.2 million, according to data provided by the Bureau of Investigative Journalism. The company has planning permission to build 229 houses on the 15-acre site in Chetwode Road, Tadworth .
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Other plots sold to housing developers include the former Badgers Wood care home in Slade Road, Ottershaw , sold for £2.2m to Stratfield Homes in June 2018, and a section of playing fields at Therfield School in Leatherhead , which was sold to A2 Dominion in February 2016 for £2 million.
The sale of the playing field, which the school no longer used, was meant to fund new facilities at the Therfield, and a 90-home development has been built there.
The council has also agreed a deal with CALA Homes regarding the former Portesbery School site in Camberley for £1.1 million, although an entry in the Land Registry suggests the council is still the owner of the building, situated behind another CALA development on the site of the old Camberley police station.
Earlier sales include Farthings in Leatherhead, sold to Bewley Homes for £14 million in August 2015, and two pieces of land to the north-west of Horley, which were sold for a combined total of £14.4 million in February 2015 and 2016 as part of plans to build a major new housing development in the area.
Not all properties were sold to housing developers. In January 2017, the council sold an office block in Epsom, Parkside House, to the local borough council for £12.4 million.
The sale came less than four years after Surrey County Council bought the property for £9.9 million.
Chris Botten, Liberal Democrat group leader at Surrey County Council, said: "The sale of property by SCC has been conducted in a haphazard and obscure fashion with no apparent strategy or coherent plan.
"A sixties care home building has been empty for over three years in my division, and there are empty sites strewn across the county as testament to this incoherence.
"There is supposed to be a joint venture with a property company to generate affordable housing but we can't get a list of the properties on it or any timescales for us to see benefits. Blighted neighbours are frustrated by inaction and valuable assets stand boarded up.
"Meanwhile there are substantial cuts to services and a hike in council tax. Residents are entitled to expect better."
County council documents claim the authority takes a "strategic approach" to selling assets considered "surplus to requirements".
Documents discussed during the budget meeting on February 5 state the council "considers a range of options for [assets'] future use including suitability for alternative use, eg. extra care accommodation, the business case for commercial or residential development against the benefits to be gained from marketing for sale.
"The council has recently entered into a joint venture arrangement with Places for People to undertake approved development schemes for a number of its vacant sites."
The data compiled by the Bureau of Investigative Journalism only covers the period up to June 2018, and more sales are likely as Surrey County Council plans to spend around £24 million of its capital receipts between 2019 and 2021 on money-saving programmes.
