The framework deal will cover Neath, Swansea and Port Talbot with up to 16 contractors appointed.
Coastal is looking to work with local firms and larger national operators on the three-tier framework which will cover health, leisure and education buildings as well as housing.
The work will be divided into contracts up to £1.5m, £1.5m to £4.5m and £4m plus.
Interested firms must be in touch by November 23 and should contact Cyril Sweett Ltd Charterhouse, Links Business Park, St Mellons Procurement and Supply Chain Management Tony Newberry CF3 0LT Cardiff UNITED KINGDOM +44 2920839180 [email protected]