These developers are Persimmon, Taylor Wimpey, Lovell, McCarthy and Stone, Countryside, Vistry, Redrow, Crest Nicholson, St Modwen, Bellway and Barratt.
Y datblygwyr hyn yw Persimmon, Taylor Wimpey, Lovell, McCarthy and Stone, Countryside, Vistry, Redrow, Crest Nicholson, St Modwen, Bellway a Barratt.