They join long-term advisers Devonshires and Trowers & Hamlins. The four firms pitched for places with a total of 25 firms.
The advisers have been appointed to work on corporate, finance and governance, real estate, commercial, housing management and employment and pensions for a period of three years.
Executive director of communications and governance at Circle Anglia Kai Boschmann said: “We’re delighted that Devonshires and Trowers & Hamlins, who have both worked with us for a number of years, have been successful in this process.
“We also welcome the newcomers to the panel and hope that this’ll be the beginning of a long and successful relationship with Cobbetts and Wragge & Co.”
The organisation, which had a turnover of £170m in 2007-08, provides affordable housing, care and support services across London, East Anglia, Bedfordshire, Hertfordshire, Surrey, Kent and Essex.
The Homes and Communities Agency – the newly created public body charged with regenerating housing stock, land and infrastructure - also recently completed a review with 14 firms appointed (1 February 2010).