Based on Building Regulations (2006) you will be providing an energy rating and report to building control for your new houses using SAP calculation (Standard Assessment Procedure) or new built EPC.
For all homes that are finished on or after 6 April 2008, there will be a requirement to provide an SAP calculations Certificate to the owner, with evidence shown to Building Control.
If you do any building work to your house which creates a separate dwelling that has heating, hot water or air conditioning, then you will need to provide an SAP calculation for your property.
When you finish your building work, Building Control ask you to submit a notice which includes an energy rating calculation to demonstrate your building complies with the Building Regulations 2006-2010 etc. By the same date on the notice, you must get a SAP certificate from an accredited SAP Energy Assessor, give the SAP calculation to the owner of the building and tell building control that this has been done based on standards.
This is what you have to do under the Building Regulations, Approved SAP Inspector Regulations and the Energy Performance of Buildings Regulations, and Building Control will not give you a final completion certificate until they are sure that everything has been done nicely and based on standards.
If the completed home is being advertised for sale, the SAP certificate and SAP rating is available for potential buyers, for the next 12 months.
In 2006, the Government in England introduced new Building Regulations which established the energy efficiency standards which new homes must achieve. New homes that are built to meet these regulations save more energy have lower carbon emissions (CO2) and cost less to run (fuel bills).
In order to meet the Building Regulations, builders need to make sure that any new properties they build meet a minimum target for energy performance rating.