The Quantum team will work for Bethel Retirement Villages, which is part of property development and investment company Partners To Group.
Bethel has submitted plans to Canterbury City Council to redevelop a Christian holiday centre site. If approval is given, work on the site could begin later this year.
Quantum director Adrienne Robins said the work included overseeing consultation events through to the development of a sales and marketing plan.
The agency will raise awareness within the surrounding communities through a mix of on- and offline marketing materials and associated PR channels.