The contractor will start mobilising for the programme this month with works starting in April.
Mulalley has worked in partnership with Croydon Council for the past ten years delivering its Decent Homes contracts as well as external redecoration and associated repairs work.
Mulalley Operations Director Bruce Benson said: “We are thrilled to have won this significant contract continuing Croydon Council’s transformation of their housing stock.
“I think this win highlights the strength of our team, our approach to partnering and the quality and value of the work we have delivered over the last ten years.
“We look forward to using our local knowledge and expertise and again providing employment for local supply chains, training and apprenticeships, to make a considerable difference to the Croydon area over the coming years.”