Transitional arrangements have been cut from the usual maximum of three years to just 12 months to speed up take up of the regulations to maximise their impact on climate change.
These regulations have already been brought in two years ahead of schedule.
Yvette Cooper said:
'Tackling climate change is one of the biggest long-term challenges we face. That is why on this occasion we need the building industry to comply with the new regulations much more rapidly than normal.
'These new regulations, combined with those in 2002, deliver a 40 per cent increase in energy efficiency standards in just four years, and cut householders' fuel bills too.'
The normal transitional arrangements for new building regulations last for up to three years. The last time that Part L was updated in 2002 the building industry had three years from the lodging of plans in which to commence work under the transitional arrangements.
Building work which has already received full building plans approval where work has not yet started will need to begin before 1 April 2007 rather than the usual three year period in order to be covered by the transitional arrangements this time.
Smaller building works that have not started before 6 April which do not require full building plans approval will need to comply straight away unless contracts have already been signed.
Where contracts have been entered into before 6 April, they will need to commence work within 6 months to be covered by the transitional arrangements. This will ensure that smaller builders and householders who may not be fully aware of the technical changes are not unreasonably affected.
1. The revised Part L 2006 regulations come into effect from 6 April 2006. From that date any building work must comply with the revised Part L 2006 regulations unless:
Work has started before 6 April 2006 in accordance with a building notice, full plans, initial notice or amendment notice.
Where full plans are not required to be deposited, a contract is entered into before 6 April 2006, provided that the work is started before 1 October 2006.
Full plans have been deposited and approved before 6 April 2006, provided that work is started before 1 April 2007.
A plans certificate or plans certificate combined with an initial notice has been given to a local authority before 6 April 2006, provided that the work is started before 1 April 2007.
2. Any building work carried out under the transitional arrangements will be subject to the current Part L (2002) regulations and energy efficiency standards.
3. Amendments to Parts L (Conservation of Fuel and Power) and F (Ventilation) of the Building Regulations were announced on 13 September 2005. These changes are being implemented together because they are closely linked and to help the industry to comply with the changes.
4. The amendments raise the energy performance of new building by 20 per cent for dwellings and up to 27 per cent for other buildings. Taking account of changes already made in 2002 energy efficiency standards will have been raised 40 per cent over four years.
5. The implementation date for the revised Part L regulations has been brought forward from the spring of 2008 as previously stated to April 2006 to increase their contribution to tackling climate change.
6. The revisions to Part L to be implemented in April 2006 will set maximum carbon dioxide emissions for whole buildings. This performance-based approach will offer designers the flexibility to choose solutions that best meet their needs, and that are cost-effective and practical. However, the revisions to Part L will raise performance standards to a level that will provide a strong incentive to designers to consider Low and Zero Carbon systems.