The Department of the Environment works with builders whose new homes achieve Sap ratings of 80 or more. The list of housebuilders includes: Admiral Homes, Chestnut Homes, Dibben Homes, Mylcrist Builders, Potton and Linden Homes. Others using high Sap/NHER ratings include Beazer Homes, Hamilton Knight and Bellway Homes. A low-energy demonstration house is currently being built alongside the Create Environment Centre in Bristol (0117 925 0505). The Eco House has a Sap energy rating of 100. When it is open to the public in the summer, the geometric structure will house a caretaker-cum-tenant.


Wates claims to be the first UK housebuilder to provide a water-saving Pressure Butt. The system, featured at Wates' Rivermead development in East Molesey (prices: pounds 225,000 - pounds 305,000), recycles up to 35 per cent of the waste water and makes an estimated saving of 14 gallons a day. For further information on the Pressure Butt, telephone 01797 320140. Houses at Hassall Homes' Knightswood estate in Nottingham feature an intelligent TotalHome electronic system which controls heating, lighting and a security alarm.


Frankl & Luty, 0171 924 2261. For Bill Dunster's Hope House project contact Michael Hopkins & Partners on 0171 724 1751. For a nationwide list of architects telephone the Royal Institute of British Architects (0171 580 5533) and ask for the Clients Advisory Service.


Dr John Miles's lecture "Where is the Henry Ford of Future Housing Systems?" is open to all and free, on May 15 at the Royal Academy of Engineering, 29 Great Peter Street, London SW1. Telephone Ove Arup on 0171 636 1531 for reservation details. Riba's 2000 Homes project welcomes responses from the public. Write to Chris Palmer, 2000 Homes, Riba, 66 Portland Place, London W1N 4AD.