The report, from Green Party London Assembly Member and former London mayoral candidate Sian Berry, found there are 442 “dead spaces” across 25 London boroughs, with the number potentially rising to almost 800 across the whole capital.
There are an average of 24 empty units per borough, meaning there could be 781 abandoned publicly-owned buildings in London.
Among the facilities that are currently lying empty are 80 retail units, 66 industrial units and 65 offices, while the report also revealed there were several disused community meeting rooms, play spaces and schools.
Assembly Member Berry has called on the Mayor of London and central Government to “empower local people, councils and charities to take these spaces over” through funding and new legislation.
She said: “Londoners have told me they are acutely aware that community spaces and buildings in their local area are sitting empty. People have called these ‘dead spaces’ – a reflection of the strong feelings people have when they see this kind of wasted opportunity on their doorsteps.
“Across London, hundreds of community groups are crying out for easier ways to take over empty buildings. Now is the time to empower local people, councils, and charities to take these spaces over, and I want to see action from the Mayor and Government.”
Of the buildings identified in the report, the majority have been empty for between one and three years, but 13 have been empty for more than a decade including one building that has not been in use for 16 years.
During her 2021 London mayoral election campaign, Ms Berry pledged to set up a “People’s Land Commission” which would support communities in finding suitable land for new homes, green spaces and community projects.
Following the publication of her report, Ms Berry has urged Sadiq Khan to adopt the idea in order to bring empty buildings back into public use.