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The 101 Guide to SAP Assessments

July 22, 2019

Andrew Sadler

Hi, I am the Director here at Buildpass, I have experience across the whole spectrum of services...

Andrew Sadler



There’s no escaping it. If you’re working on any new residential developments, conversions and even some extensions, Building Regulations insist you have a SAP calculation on your property.

But what is a SAP calculation and what does it mean?

We’re glad you asked. A SAP calculation stands for a Standard Assessment Procedure calculation. Or, in other terms, the means of showing that your new build complies with energy and carbon requirements set out in the current Building Regulations.

Basically? It’s your measure of the energy and environmental performance of your new dwelling and your assessment of the energy your new development is likely to consume. 

Why is SAP required?

Firstly, is use by your Building Control Officer to ensure that your home meets both the carbon emissions and fabric performance standards set out in Part L of the Building Regulations.

Thirdly it can be used to demonstrate compliant with a planning condition relating to carbon or energy saving.

Lastly, it is used to produce your Energy Performance Certificate.

What is the difference between SAP and EPC?

The SAP calculation is the methodology behind the Energy Performance Certificate, basically a big list of calculation used to judge the overall performance of the building.

How do we judge a SAP calculation?

When we carry out a SAP calculation, there are a whole host of things we take into account:

You’ll get a score of 1 – 100+ which will then determine your energy running costs. The higher the score, the lower your cost. Simple!

What happens after the SAP calculation?

Once your SAP has been calculated, it will be used to form:

  1. Your SAP rating
  2. Your Predicted Energy Assessment (PEA)
  3. Your Energy Performance Certificate (EPC)

These are necessary components required when your new property is completed and ready for sale or occupation. 

Do I need a SAP calculation for an extension?

This depends on the type of extension, other works that form part of the extension on the amount of glazing, we have a dedicated post on the subject. Do I need a SAP Calculation for my extension ?

How do I arrange a SAP calculation?

That’s where we come in. At Buildpass, we provide SAP calculations as well as your EPC as part of the same service at no extra cost.

Our expert team will eliminate the complexities of navigating SAP calculations by taking ownership of the process from beginning to end. And by including your EPC within the package, you’ve immediately got one less thing to worry about.

How much does a SAP Cost?

This very much depends on the size of the property and the number of units being assessed. Prices range from anywhere between £50 and £300.

Speak to the experts

Find out more about SAP calculations and your EPC by getting in touch with our friendly team. We’re always happy to chat through our services in order to find the perfect way to support you.

AECB Building Knowledge
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