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Table 1 Minimum standards for energy and water at each code level
Code level123456
Energy/carbon emissions (% improvement over ADL1 2006)10%18%25%44%100%zero carbon
Water (litres per bedspace per year)12012010510580 80
Table 2 Baseline costs and performance of the house types
Unit TypeBase Cost (per unit)Area (m²)Cost per m²Target emission rate (kg CO2 m²)
Masonry detached house£91,206116£78624.1
Masonry end-of-terrace house£75,235101£74521.1
Low-rise flat£79,20059£1,34220.6
High-rise flat£124,50075£1,66024.9
Weber Haus, terraced house£59,95877£77926.7
SixtyK house£60,00077£77919.3
Estimated extra cost for site-wide heat and power services£9,60177£125Ìý
Table 4 Costs of meeting the energy standards for code level three
House typeTraditional detached houseTraditional terraced houseLow rise apartmentHigh rise apartmentSixtyK HouseWeber Haus
Scenario 1£3,916£3,692£2,907£5,952£0*£120
Scenario 2£1,693£1,693£1,600£3,751ÌýÌý
Scenario 3£2,622£2,622£1,349£1,695ÌýÌý
Scenario 4£4,481£3,917-£3,917ÌýÌý
* Costs of SixtyK House do not include for costs associated with provision of CHP and PV as these are to be provided by an Esco