Whole House SAP for Your Extension

Small Property <80m²

£225.00 fixed fee

A SAP comparison covering your existing home and extension. We compare the proposed scheme with a reference scheme and explain any improvements needed.

Check the proposed extension before committing to the specification, with advice on balancing the additional heat loss.

What you'll receive

  • Reference house SAP calculations
  • Proposed house SAP calculations
  • U-value calculations

Part L compliant calculations and reports, accepted by building control.

Advice and revisions for your selected assessment are included.

Turnaround: 4 working days. Once we have your drawings and specification.

Project stage
Complex assessment (+30%)
e.g. mezzanine, vaulted / sloping ceilings, non-standard geometry.