The firm will build a £45m extra care village at Hughenden Valley in High Wycombe for the ExtraCare Charitable Trust.
It is the eighth such village for the trust and will contain 260 one and two-bedroom apartments situated around centralised health and leisure facilities.
Partnerships has also been chosen by Birmingham Municipal Housing Trust to construct a new 116-home development at Jarvis Road in the north of the city.
The £16m scheme will create 58 affordable homes and 58 for open market sale.
Peter Truscott, Chief Executive of Galliford Try, commented: “Our Partnerships business is rapidly turning into a real success story and these latest contracts demonstrate the trust that clients have in Partnerships to deliver the homes they need across a range of different housing types and tenures.”