SAP Calculations for New Build

SAP Calculations for New Build

SAP calculations are required for domestic/residential new build projects, in order to demonstrate compliance with Part L1a (and regional equivalents) of the Building Regulations/ Standards.  

Any house builder or developer in the UK looking to build a new home will be asked by Building Control for New Build SAP Calculations before (Design Stage) and after (As-Built) a dwelling is built.

Whatever the size of your project, Elmhurst Energy Services can complete your SAP calculations to ensure building compliance and can produce that all important Energy Performance Certificate (EPC).

Part L1a SAP Calculations?

Part L of the the Building regulations covers guidance for the conservation of fuel and power within existing buildings. Part L1a exclusively covers the conservation of fuel in power in new dwellings, whereas Part L1b covers existing dwellings including extensions and conversions.

Standard Assessment Procedure (SAP) calculations, measure the energy efficiency of buildings in compliance with Part L1A of Building Regulations in England and Wales, It is the government approved method of assessing and measuring the energy rating of any new build residential building.

Different regulations apply in Scotland (Section 6) and Northern Ireland (Part F).

TER and DER Calculations 

Through approved SAP software we can determine the Target Emission Rate (TER) and Dwelling Emission Rate (DER) both at design and as-built stage. 

The TER is determined from a notional dwelling of the same, shape, size and orientation of the actual dwelling. The DER must be equal to or lower than the TER in order for the property to achieve a PASS from a Building Control Officer or Verifier. 

SAP Calculations for New builds- How we can help

Our team of experienced consultants are able to offer you the advice needed to meet the necessary requirements and help you to achieve compliance.

We work from architect drawings (including: plans, elevations & sections) and a building specification to produce those calculations in the office, with no site visit required.

In addition to helping clients demonstrate building regulations and building standards compliance, Elmhurst Energy also offers the following services:

  • Specification reviews
  • U-value calculations – measure of heat transfer through individual building elements (walls, roofs & floors)
  • Water efficiency calculations (Part G)
  • Environmental/ sustainability statements

Whether for a single property or a large-scale phased development, our experienced team of  consultants will ensure a hassle-free service.

Call us now on

01455 883 259

 and discuss your project with us, there’s no obligation and we’re happy to advise you.

Or why not complete our 'Get a quote' form



Related Links

SAP Calculations> SAP Calculations for Conversions> SAP Calculations for Extensions >

Get a quote

Please provide a few details below and we'll get back to you as quickly as possible


Elmhurst Energy Services Ltd. 16, St Johns Business Park, Lutterworth, Leicestershire, LE17 4HB

© Elmhurst Energy Services Ltd 2019. All rights reserved. Elmhurst Energy Services Limited is registered in England, Company Number: 06087105