Cost model: Procuring social housing | Features

How the Amphion consortium is monitoring continuous improvements
Innovation stage	Technology	Process	Site size (units)	Adjusted base cost (£/m2)*	Construction speed (weeks)	Quality achieved	Contractor profitability
1	Cassette roofs	Project partnering	28	770 (out-turn)	40	Good	Yes (1-2%)
2	Platform panels in lieu of balloon-frame technology; lightweight cladding	PPC2000	17	735 (contract sum)	36	Better	Not known
3	Factory-fixed windows and doors	Increased speed on sites; corporate deals with supply chain	84	700 (estimate)	51	Expected to be much better	Not known
* Examples based on sites committed to the Amphion programme. Construction cost at 1Q2000 prices based on south-east England. Costs include external works and external services.