On-Construction Domestic Energy Assessors

SAP & On-Construction EPCs

Part L compliance support for new-builds, conversions and extensions, from design stage to as-built completion, with no surprises at sign-off.

• A desktop service, available UK-wide.
• Not just for new-builds: we also cover conversions, change of use and extensions, demonstrating L1B compliance for barn conversions, commercial-to-residential projects, other newly created dwellings and extensions to existing homes.
• Design-stage SAP calculations to measure your proposed specification's compliance with Building Regulations Approved Document L before you build.
• Early advice on fabric, heating and renewables to hit U-value, TPER, TER and TFEE requirements to ensure you achieve Part L compliance.
• As-built SAP calculations using the actual construction details and air-tightness test results, with the compliance report your building control body needs.
• On-construction EPCs lodged on the government register at completion.
• Optional add-ons (quoted separately): fabric specifications to hit U-value targets and, where approved details fall short, bespoke psi-value calculations to improve results and avoid costly over-specification.