Working file V4
Coordinator-led vs installer-led retrofit (UK 2026)
Coordinator-led vs installer-led retrofit (UK 2026): side-by-side decision aid with capex, grant treatment, payback shape and surveyor's note.
| Dimension | Coordinator-led (PAS 2035) | Installer-led (BUS-only) |
|---|---|---|
| Process | Assessor + Coordinator + Designer (Path B/C) + monitoring | MCS install only |
| Process fee | £2,500 to £6,000 | nil |
| Risk-transfer | Coordinator carries PI on the process | Installer carries workmanship only |
| When mandatory | ECO4, GBIS, SHDF, HUG, Warm Homes Plan | Standalone BUS HP |
Surveyed 22 June 2026. Ofgem Q3 2026 cap applied (gas 7.33p, elec 26.11p, gas standing 29.04p). Next scheduled review 26 September 2026 (Q4 cap publication). [ref V4]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.