Notice: Please note there is scheduled update work planned on the JSAP website on Thursday 27 February 2019 at 4pm. The site will be unavailable for a short time. Apologies for any inconvenience this might cause.


Welcome to Jersey SAP

BRE SAP Engine


This website provides support for the use of a tool designed to produce energy performance assessments for domestic buildings as required by the Jersey Building Bye-laws. When provided with details about the dwelling configuration the Calculator will show if the energy performance targets set by the building bye-law have been met, and it will provide an energy performance certificate giving an estimate of the likely running costs, SAP ratings, etc.

The Jersey SAP tool was created by BRE.

Sign up now to Jersey SAP!

If you have already registered, please log in to access your account.

Otherwise, in order to use Jersey SAP users must be registered. To begin the registration process please click here.

If you have any difficulty with the registration process please click here for help. If you have any more general questions about the Jersey SAP Calculator please visit the Frequently Asked Questions page in the first instance, or click on the 'Contact us' link at the top of this page if your question is not already answered.