Curo manages close to 14,000 homes for more than 25,000 people across the West of England.
It plans to build between 250 and 300 new social homes every year over the next five years and deliver between 100 and 200 private market sales annually.
The housing association is planing to set up a panel of preferred contractors and developers to call off projects over this period.
Under the present procurement timetable it aims to name it preferred partners on 8 August.
Firms wishing to bid should click here for details. The closing date is 28 May.