The merged group has more than 1,500 staff and 75,000 customers across Wiltshire, Hampshire, Somerset, Dorset, Berkshire, Devon and Cornwall.
Aster Communities and Synergy Housing will manage more than 27,000 affordable homes. Aster Property will carry out 60,000 repairs and maintenance jobs a year. Aster Living will provide care and support for around 20,000 customers.
The new group’s development business, Aster Homes, will build around 600 new homes each year from 2013, for open market sale and for rent as affordable housing.