The trio have already collaborated on policy issues, but they are now working towards moving to shared premises, with combined finance and IT resources, by the end of 2008.
The membership bodies revealed their plans at the launch of a feasibility study, Working together for better office infrastructure, on Monday.
"We know there are overlaps and a huge amount of work we can do together to strengthen the three organisations," Stephen Bubb, chief executive of Acevo, said at the launch. He added that there were no plans to merge the bodies.
The feasibility study was funded by the ChangeUp National Infrastructure Modernisation Fund and drafted by third sector consultants Sayer Vincent.
Nick Aldridge, director of strategy and communications at Acevo, said earlier: "It has long been decided that we were going to move together, but until now the time had never been right. Then the Cabinet Office funding gave us the chance to work on why we want to work together.
"We would like to see the sector's professional bodies based together and working together to provide better services for our members."
In a joint statement, Gail Scott-Spicer, deputy chief executive of Acevo, Lindsay Boswell, chief executive of the Institute of Fundraising, and Keith Hickey, chief executive of CFDG, said collaboration and innovation were "essential traits" of successful third sector organisations.