HC Deb 16 May 1994 vol 243 c378W
75. Mr. Austin-Walker

To ask the Secretary of State for the Environment what proportion of houses constructed in the last 10 years would qualify for a standard assessment procedure rating of(a) 55, (b) 60, (c) 65, (d) 70 and (e)

Sir George Young

[holding answer 13 May 1994]: To answer the question as posed would require exact data on the characteristics of all dwellings built in the period. This information is not held centrally and could be obtained only at disproportionate cost.

However, the proposed revisions to the building regulations, in addition to leading to an improvement in energy efficiency of between 25 and 35 per cent. compared with the current standards, will also require all new dwellings and conversions to dwellings to obtain an SAP rating.