Building regulations

Standard Assessment Procedure (SAP) 

""Standard Assessment Procedure (SAP) calculations are required to prove Building Regulations Part L compliance for all new build properties, all conversions and extensions where the glazed area is over 25% of the floor area. The first part of the SAP calculations involves the assessor working out a Target Emission Rating (TER) for the dwelling. The next step is calculation of the Dwelling Emission Rate (DER). If this is equal to or less than the TER then the SAP rating shows a pass, the SAP calculations are complete and the building is certified as compliant with Part L of the Building Regulations. 

The SAP calculations are used to determine how a property scores on Energy and CO2 emissions category under the Code for Sustainable Homes. 

More information on Code for Sustainable Homes

Energy Performance Certificates 

From October 2008 all buildings, whenever sold, built or rented, need an Energy Performance Certificate (EPC). 

The certificate provides energy efficiency A-G ratings and recommendations for improvement. The ratings - similar to those found on products such as fridges - are standard so the energy efficiency of one building can easily be compared with another building of a similar type.

Nottingham Declaration

Nottingham Council's Executive Board adopted a policy in 2007 requiring 10% of the energy supply (interpreted through carbon emissions) in all new developments over 1,000 square metres to be gained on-site and renewably and/or from a decentralised, renewable or low carbon energy supply.
All planning applications to which this requirement applies must be accompanied by an Energy Statement. This is a technical report, written as a supplement to a Design and Access Statement, clearly showing how a development proposal will meet the City Council’s sustainable energy planning requirement.

So far, 300 councils have voluntarily signed up to the Nottingham Declaration framework.

For more information please visit

If you need help in meeting the legislation and regulations that affect you, call us on 0800 051 5687 (Mon-Fri, 9am-5pm) or email us.

Merton Rule

The Planning and Energy Private Members Bill would allow councils to set targets in their areas for on site renewable energy, on site low carbon electricity and energy efficiency standards in addition to the national regulations.

The bill would cover England and Wales and would require developers to source at least 10% of any new building’s energy from renewable sources. The so called “Merton Rule” is named after the sustainable planning policy first adopted by London Borough of Merton. The Bill is currently being debated in the House of Lords. However, some councils and Local Authorities have adopted the Merton Rule voluntarily

Display Energy Certificates

From October 2008 large public buildings need to have on public view a Display Energy Certificate (DEC) showing the building's energy efficiency rating.

The DEC is based on the energy consumption of the building as recorded by gas, electricity and other meters. The DEC should be clearly displayed at all times and clearly visible to the public. A DEC is always accompanied by an Advisory Report that lists cost effective measures to improve the energy rating of the building. 

Display Energy Certificates are only required for buildings with a total useful floor area over 1,000 square meters that are occupied by a public authority and institution providing a public service to a large number of persons and therefore visited by those persons. They are valid for one year. The accompanying Advisory Report is valid for seven years.