• MenuMenu
  • Home
SAP Assessments and EPC

Our SAP Assessors are fully accredited Domestic Energy Assessors (DEAs)

Sadler Energy provide SAP Calculations and Energy Performance Certificate on domestic properties as required for both L1A and L1B Compliance.

SAP Calculation

Sadler Energy provide SAP Calculations and Energy Performance Certificate as required for both L1A and L1B Compliance. Whether you are building a new dwelling, converting an existing building or planning an extension we can provide the assessment, certification and support you need to make the process as easy as possible.

What is a SAP Calculations and when do I need one?

When someone asks for a SAP Assessments what they are actually interested in is the Governments Standard Assessment Procedure for Energy Rating of Dwellings and forms part of the latest requirements under the Building Regulations in England and Wales. Any new build domestic dwellings including conversions and extension will be required to undertake a SAP Assessment to prove compliance with the Building Regulations, in particular Part L. Part L1A of the building regulations details the requirements for new build dwellings, while Part L1B details the requirements of existing dwellings, such as conversions and extensions. The full details of these two Parts can be downloaded from the Government Website, and can be useful to have a read through before undertaking your project. L1A and L1B Compliance Documents.

  • New build dwellings
  • Change of use from commercial to domestic property
  • Barn conversions
  • Extensions

At Sadler Energy and Environmental Services our SAP Consultants are accredited to produce Design Stage and As Built SAP Assessments, as well as Energy Performance Certificates (EPCs), with fully qualified Domestic Energy Assessors (DEAs). This page specifically details the requirements of new build dwellings, if you need information on a conversion or extension you can find more information by viewing the extension sap calculation page.

Why do I need a SAP?

The Building Regulations for England and Wales Compliance Part L1 require all new properties to be assessed using Standard Assessment Procedure (SAP) calculations for energy conservation. The SAP Assessment comprises a detailed report highlighting the Environmental Impact Rating (EIR) and the subsequent running costs of the dwelling.

Part L1 of the Building Regulations (England and Wales) also requires that the Dwelling Emission Rate (DER) should be equal to or lower than the Target Emission Rate (TER) for the dwelling and that the Designed Fabric Energy Efficiency (DFEE), should be equal or lower than the Target Fabric Efficiency (TFEE).The SAP Calculation is used to show compliance with this part of the regulations.

If you have a commercial property you need testing, instead of a SAP Assessment you will require a SBEM Calculation which we can undertake for you.


SAP Requirements

Are SAP Assessments the same as an EPC?

At the dwelling design stage your dedicated SAP Consultant will produce a Predictive Energy Assessment (PEA) highlighting those areas of the design which are crucial to ensure that you meet your Target Emission Rate. The Energy Performance Certificate (EPC) records a home's energy and CO2 emission performance. The certificate uses a scale from A to G to show the energy efficiency of the dwelling. A Band A dwelling is the most efficient and should therefore should save the most on energy bills.

The SEES Approach

As a fully accredited provider of SAP Assessments, our qualified On Construction Domestic Energy Assessors and Consultants will inspect your building plans to assess and certify the energy rating on individual properties and apartments enabling you to comply fully with the Building Regulations requirements. We also offer both Predictive Energy Assessments (PEAs) and Energy Performance Certificates (EPCs), which help buyers and homeowners easily understand the energy efficiency of their homes.

Our qualified team are able to offer support in the following ways

  • We have a wealth of experience within the building industry are constantly researching Energy Saving technologies and materials. This knowledge and experience enables us to guide you in the right direction and, when we produce the SAP Assessment, we will also highlight areas of potential improvement. We are fully accredited with Elmhurst Energy a leading body in Energy Assessments.
  • In addition to our SAP Assessments, we also offer a full Technical Advisory Service to architects and developers wishing to achieve high efficiency SAP ratings in order to increase sales potential and property value.

What you can expect

  • Planning Stage: We will look at the proposed design and help with putting together a proposal that will meet the local planning authorities requirements. If there is a particular policy in place, such as the London Plan or renewable contribution, we can formulated a robust report.
  • Design Stage: We will work closely with your design team to ensure that the fabric, space and water heating will meet the required standards and where renewable and low carbon technologies are required we can suggest the best approach.
  • As Built Stage: At the as built stage we send you a SAP Summary detailing the specification we have within the SAP Calculation, we can then register the address with Landmark if required and where applicable enter the air test figure and lodge the EPC. We can even send Building Control the As Built SAP, Compliance Document and EPC on your behalf. We can also undertake the air tightness test to make your life that little bit easier.

Why not ask us for a quote?

We have extremely competitive pricing, why not get a free non-commital quote.


Ready for a quote?

We have extremely competitive pricing, why not get a free non-commital quote. Call us on 01962 718870 or use the link below.


Why choose Sadler Energy for your next construction project?

There must be a reason why our clients keep coming back to us.

On Time

On Budget


Great Ideas


Happy Clients

© 2006 - 2016 Sadler Energy and Environmental Services Ltd.
[Site Map] [Privacy] [Environmental Policy]

SAPs • Code For Sustainable Homes • EPCs • Air Testing
Covering Southern England: Hampshire, Dorset, Sussex, Wiltshire, Berkshire, Surrey and London.


We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on the Sadler Energy website. However, if you would like to, you can change your cookie settings at any time.

More Information