SAP Calculations
SAP Calculations & SAP Assessments Across the UK
Part L Compliance Support Since 2005
Crowther Solutions provides SAP calculations and Part L compliance support for new builds, conversions and extensions across the UK. With construction and energy assessment experience dating back to 2005, we help clients optimise specifications, resolve compliance issues and achieve compliance without unnecessary over-specification.
Need a SAP Calculation?
Send us your drawings and available specification for a project-specific quotation.
Request a Quote
Why Experience Matters in SAP
Successful SAP compliance requires more than entering information into assessment software. Crowther Solutions reviews how the building fabric, heating, ventilation, thermal bridging and renewable technologies work together, identifying where changes will have the greatest impact. This helps clients achieve Part L compliance efficiently while avoiding unnecessary specification upgrades and costly late-stage redesign.
“We approached Matthew as we were in need of a pragmatic and communicative SAP Consultant who could bring value to our project portfolio. The service provided by Crowther Solutions is always first rate and very professional no matter what size job is being carried out. Crowther Solutions not only lead you through processes logically but offer sound advice and reassurance, which makes them an integral part of the design team.”
Morgan Lloyd Jones Architects — Garrard Dennis, Design Director
Our SAP Services Include:
New Build SAP Calculations: Design-stage and As-Built assessments to demonstrate compliance with the applicable Part L requirements using the relevant SAP methodology.
Conversions & Extensions: SAP assessments for conversions and extensions, including heavily glazed extension calculations where required.
U-Value Calculations: Thermal performance calculations for walls, floors, roofs, windows and other building elements.
Technical Compliance Advice: Practical guidance on heating systems, thermal bridging, ventilation and renewable technologies to help achieve compliance efficiently.
Design-Stage SAP Calculations for New Dwellings
Completing the SAP assessment at design stage helps identify compliance risks before specifications are fixed and construction begins. We assess the proposed fabric, heating, ventilation, thermal bridging and renewable technologies to identify where changes will have the greatest benefit. Resolving these issues early can help avoid unnecessary upgrades, late design changes and problems when completing the As-Built SAP assessment and New Build EPC.
Extension SAP Calculations & Highly Glazed Extensions
Where an extension exceeds the usual glazing limits, a SAP-based assessment can be used to compare the proposed design against a compliant notional extension. This allows improvements elsewhere in the specification to offset additional heat loss from larger areas of glazing, helping retain the intended design while still achieving Part L compliance.
Read more about Extension SAP Calculations
Future Homes Standard & SAP 10.3
The Future Homes Standard introduces significant changes to the energy-performance requirements for new dwellings, including low-carbon heating, renewable electricity generation and SAP 10.3 for projects falling under the new requirements.
Projects should establish which Building Regulations and transitional arrangements apply before deciding which SAP methodology should be used. Early assessment can help project teams understand how proposed fabric, heating, ventilation and renewable technologies may affect compliance before the specification is fixed.
Read our Future Homes Standard & SAP 10.3 Guide
Need More Information About SAP Calculations?
Our SAP Calculations Explained guide covers when SAP calculations are required, what information is needed, the difference between Design-Stage and As-Built SAP, and what happens if an assessment does not initially comply.
Read our SAP Calculations Explained Guide
Request a SAP Calculation Quote
Send us your drawings and project information and Crowther Solutions will review the assessment requirements and provide a project-specific quotation. We support projects across the UK and can provide guidance throughout the SAP assessment process where required.
