Specialist service
SAP Calculations Scotland
SAP calculations for residential projects across Scotland. We work from architectural drawings and specifications to assess the design, identify changes needed and coordinate the completion-stage energy information.
From £200 + VAT
Starting price for straightforward assessments. Final pricing depends on property size, complexity, available information and site requirements. We confirm the scope and full cost before work begins.
What is included
What you get with this service
A clear, practical scope covering the assessment, technical work and final outputs needed for the project.
Who this is for
Designed for the teams responsible for delivery and compliance
We work directly with the people who need clear answers, dependable reporting and a straightforward route to completion.
Last reviewed: . Reviewed against the official and technical sources below.
What are SAP calculations?
SAP is the Standard Assessment Procedure for the Energy Rating of Dwellings. It evaluates dwelling energy performance from geometry, fabric and services information. It is a calculation method used for residential assessment, whereas SBEM addresses non-domestic buildings.
When is SAP required?
New dwellings normally need calculations demonstrating the applicable Scottish domestic energy standards. For a conversion or extension, the evidence route depends on the work and the relevant handbook provisions; not every alteration needs the same full-dwelling calculation. Confirm the scope with the design team and verifier.
How do Scottish Building Standards affect the assessment?
Scottish projects should use the applicable Section 6 guidance and approved software for their warrant date, rather than assuming England’s Part L applies. The domestic handbook for warrants from 6 April 2026 is linked below. Older warrants may need an earlier edition and its transitional arrangements.
What is the difference between design and as-built SAP?
Design-stage calculations test the proposed construction before key specifications are fixed. As-built calculations are updated to reflect installed products, construction changes and supporting test evidence. Keeping a change record helps avoid late discrepancies between the approved design and completion information.
Does SAP produce the final EPC?
SAP assessment information can support the new dwelling’s EPC, but a design-stage calculation alone is not the final lodged certificate. Confirm completion evidence and EPC delivery within the agreed instruction. An existing home assessment may use a different evidence process.
When should the architect commission the work?
Begin once coordinated plans and an initial specification are available. Testing insulation, glazing, heating, hot water and ventilation options at this stage is more useful than discovering a shortfall after procurement. Provide the warrant deadline and intended completion date when requesting a programme.
What information should I send?
- Dimensioned plans, elevations, sections and orientation
- Wall, roof and floor build-ups; window and door specifications
- Heating, hot-water, ventilation and renewable-system details
- Thermal-bridge evidence, airtightness target and completion test results
- Warrant date, dwelling schedule and record of design changes
Send what you have through our quote request form or contact the Glasgow team to confirm the scope. See our selected projects for the buildings and estates featured in our portfolio.
Related assessments
Official guidance and sources
Requirements depend on the property, proposed work and relevant dates. The sources below distinguish statutory guidance from assessment methodology; SES provides assessment services, not regulatory approval.
Need this service?
Send us the project details and we will confirm the scope.
Share the property type, location, project stage and target date. We will come back with the information we need and the next available delivery window.
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