SAP Help
SAP Help and Guidance
Straightforward guidance on SAP calculations, Part L compliance and some of the common issues that can affect a residential SAP assessment.
What Information Do You Need for a SAP Calculation?
Find out which drawings, specifications and project details are needed for SAP calculations, and what can be confirmed later.
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How Much Do SAP Calculations Cost? A Guide to Prices and Quotes
Compare indicative SAP calculation prices from £150 and find out what affects the cost of an assessment for your project.
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SAP Calculations for New Builds: A Step-by-Step Guide
A practical guide to new-build SAP calculations, from design and Building Regulations compliance to as-built assessments and EPCs.
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SAP Calculations for Extensions: When Are They Required?
Find out when house extensions need SAP calculations, how the 25% glazing rule works and which Part L compliance options are available.
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SAP Calculations for Conversions and Changes of Use
Find out when conversions and changes of use may need SAP calculations, including barn conversions, commercial-to-residential projects and houses converted into flats.
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Retrospective SAP Calculations: What If Building Work Is Already Complete?
Already completed building work but still need SAP calculations? Find out what evidence is required and how retrospective assessments work.
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What is a SAP calculation and what is it used for?
What SAP measures, when it is needed and the information an assessor works from.
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How to comply with Part L Building Regulations
The main design factors that typically affect residential Part L compliance.
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Common reasons a SAP assessment can fail
Design and information issues that often lead to non-compliance, and what can be reviewed.
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Need help with a live project?
If you need a SAP calculation or want us to review your project information, you can start an enquiry online.
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