One of Canberra's biggest developers has vowed not to pursue land development after buying the Canberra Equestrian Centre at Stromlo.

The 600-acre rural block was sold in June to Cooleman Pty Limited, a subsidiary of the Doma Group.

The Doma Group is responsible for major residential and commercial development across Canberra, including Dockside at Kingston and Realm Park at Barton.

Despite concerns from some residents and horse riders, Doma director Jure Domazet said the land would not be developed.