The appointment was made without a pitch and comes two weeks after MediaVest and MediaVest Manchester won the housing developer's media planning and buying business following a shoot-out against MediaCom.
It reunites CHI with Mark Clare, the former managing director of British Gas' residential energy business, who joined Barratt Developments in September 2006 as its group chief executive.
CHI has been briefed to rebrand Barratt Homes and relaunch the brand with a TV campaign later in the year.
In February, Barratt Developments purchased the rival developer Wilson Bowden in a cash and shares deal worth £2.2 billion. The deal created the joint-largest listed house building company by market value with Persimmon.
The group encompasses four brands: Barratt Homes, David Wilson Homes, Ward Homes and Wilson Bowden Developments.
In July, Barratt Homes revealed it had signed contracts for forward sales worth £1.01 billion, a 20 per cent increase on the same period the previous year. The average Barratt house price rose 2.3 per cent to £169,700 over the period.