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 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 V4]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.