Working file P1
Retrofit Assessor cost (UK 2026)
Retrofit Assessor cost (UK 2026): working anatomy of the fee line, deliverables, when mandatory.
Cost in 2026
A PAS 2035 Retrofit Assessor charges £400to£800 for a single property. The deliverable is an RdSAP energy assessment, an occupancy assessment and a condition report.
What you get back
- RdSAP file with EPC band before and modelled after.
- Occupancy assessment (vulnerable persons, heating habits).
- Condition report flagging damp, structure, services.
- Improvement Option Evaluation feeding into the MTIP.
Where to find one
The TrustMark directory and Retrofit Academy directory list PAS 2035 Assessors by region. Many Assessors trade as one-person businesses; lead times in 2026 are typically two to six weeks.
Surveyed 1 October 2026. Ofgem cap for 1 October to 31 December 2026 applied (gas 7.97p, elec 26.32p, gas standing 29.68p, elec standing 54.83p). Next scheduled review 25 November 2026 (January cap announcement). [ref P1]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.