retrofitcost.co.ukA surveyor's working file. Q4 2026 Ofgem cap applied.
Home/Pas 2035/Medium Term Improvement Plan
Working file P4

Medium-term improvement plan (PAS 2035)

Medium-term improvement plan (PAS 2035): working anatomy of the fee line, deliverables, when mandatory.

What the MTIP is

The MTIP is a sequenced 5-to-25-year plan for the property, written by the Coordinator. It is the deliverable that distinguishes a PAS 2035 retrofit from a one-shot installer-led job.

Ownership

The homeowner owns the MTIP after handover. It is the document a future Coordinator, valuer or mortgage lender will read first.

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 P4]
By Oliver Wakefield-Smith, Founder, Digital Signet. Corrections to oliver at digitalsignet dot com.