Construction has begun on a new £12m building that is expected to house more than 40 charities in south London.
The Foundry, in Vauxhall, will provide a purpose-built space for organisations working in the fields of human rights and social change, and will have desks for 330 employees.
The project is being led and part-funded by the Ethical Property Company. The remainder of the funding has been provided by the Trust for London, the Barrow Cadbury Trust, the Joseph Rowntree Charitable Trust, the LankellyChase Foundation and Big Society Capital.
Simon Halls, marketing manager at the Ethical Property Company, said that work had been going on for two weeks on the site and that his organisation had already had expressions of interest for about 35 per cent of the space. He said that it was due to open in summer 2014.
"This is an exercise in mission-related investment," he said. "Already Vauxhall has a large number of well-known charities, and this new development will take the number to about 75."