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Design & Construction

New Build

All new build dwellings require a SAP calculation which confirms compliance with Part L of the Building Regulations.


Resolution Energy is fully accredited through Elmhurst Energy to provide SAP calculations and Building Regulations Part L compliance. Claire has been an Elmhurst accredited SAP Assessor for over 10 years and has experience of working on a wide range of house and construction types.


  • We can assess new build housing and also conversions such as office to residential, or division of houses to flats.


  • We will review your drawings and advise on any improvements that may be needed, for example to insulation, air tightness, heating systems, ventilation or renewable energy technologies. SAP calculations do not generally require a site visit so we are able to offer this service nationwide.


  • On completion of the build we will provide the ‘As Built’ compliance reports for Building Control and lodgement of Energy Performance Certificates (EPCs).

We can help with


SAP calculations


Energy Performance Certificates (EPCs)


Part L compliance


Part G water efficiency calculations

new build regulations

SAP Calculations for Extensions

Extensions with large areas of glazing such as roof lanterns or bifold doors will generally need a SAP calculation which will be requested by your Building Control Officer.


We will review your design and advise of any changes that may be needed to meet the requirements.

SAP calculations for extensions
quote mark


'I have used Claire as an external consultant extensively for all our design work where we need to assess the thermal characteristics of existing properties and how to upgrade them and also how to achieve ever-increasing demands on the thermal efficiency requirements for new build residential developments. Resolution Energy has always provided a clear and informative solution.'


Chris Tomes

Tomes Architects


'We found Resolution Energy by chance online, but could not have done better. Amazing service with clear answers to questions and lots of great guidance. In the end our work was completed on time to a great standard.'


Ashley Winston

on behalf of Britannia Property Investment

'We recently designed and built our own home and couldn't have done it without the help of the professionals. Claire at Resolution Energy has been absolutely amazing in guiding us through the Building Regulations and providing an extensive SAP report, as required for NFDC.  Nothing was too much trouble, she was always at the end of the phone and such an asset when the stress levels were rising.  Would highly recommend this company without reservation.'

Vicki Gritt