EPCs, PAS 2035 retrofit assessments, thermal imaging surveys — the technical inspections that unlock UK grant funding and de-risk every home upgrade. Match in 60 seconds with TrustMark-registered assessors in your area.
An EPC rates a property A–G for energy efficiency and gives a separate environmental-impact rating. It is produced by a Domestic Energy Assessor (DEA) accredited under a government-approved scheme such as Elmhurst, ECMK, Stroma or Quidos, and lodged on the official UK EPC register where it remains valid for 10 years.
By law, a valid EPC is required before selling or letting a home in England, Wales or Northern Ireland (Scotland has its own scheme). It's also a precondition for most grants: ECO4 and Warm Homes: Local Grant require an EPC of D–G, and the Boiler Upgrade Scheme requires a valid EPC with no outstanding loft or cavity insulation recommendations.
Tell us your postcode, property type and reason for the EPC (sale, let, grant, mortgage). We match you with an accredited DEA in your area.
Typically 45–90 minutes. The assessor measures rooms, photographs key features, and inspects boiler/insulation/glazing.
You receive a digital PDF certificate within 1–3 working days, lodged on the UK EPC register. It's instantly available to estate agents, solicitors, and grant funders.
A Retrofit Assessment is a whole-house technical inspection carried out by a TrustMark-registered Retrofit Assessor under PAS 2035. It goes far beyond an EPC — it considers the fabric, services, occupant context, ventilation, and moisture risk in one integrated view.
The assessment output is a Retrofit Assessment report that feeds into the Retrofit Coordinator's plan and the Retrofit Designer's spec. Every measure funded by ECO4 or the Warm Homes Plan must be preceded by this assessment — it's the legal gatekeeper for whole-house funding.
Tell us your postcode, property type and which grant you're targeting (ECO4 / WHLG / private retrofit). We route you to the right Retrofit Assessor.
Typically 2–4 hours. Whole-house inspection, photos, U-value evidence, occupant interview, ventilation tests.
Within 5–10 working days the Retrofit Assessor produces a TrustMark-compliant assessment report with risk path scoring and recommended measures.
If proceeding with works, the report passes to a Retrofit Coordinator who oversees design and installation through to commissioning.
PAS 2035:2019 (updated 2023) is the British Standard that defines how energy retrofits should be carried out on domestic buildings in the UK. It was developed after the Each Home Counts review uncovered systemic failures in earlier retrofit schemes — most notably damp and ventilation problems caused by piecemeal installations.
Since 2020, every UK government-funded retrofit measure — ECO4, the Boiler Upgrade Scheme (insulation prerequisites), GBIS (now Warm Homes: Local Grant) and the Warm Homes Plan from 2027 — must follow PAS 2035. It defines the framework, the standards, and the four required professional roles.
You cannot receive ECO4 or Warm Homes funded measures without a current PAS 2035 retrofit assessment in place. It's the gatekeeper.
The risk path scoring forces the design to address ventilation and damp risk — preventing the post-install moisture failures common before 2019.
All PAS 2035 work is covered by TrustMark's consumer-protection guarantee, including financial protection against installer failure.
The Retrofit Coordinator lodges the project on the TrustMark portal — creating a single auditable record from assessment through to install.
A thermal imaging survey uses an infrared camera to visualise heat radiating from a building's surfaces. Warm areas appear yellow/red, cold areas appear blue/purple — instantly revealing problems invisible to the naked eye: missing insulation, air leaks, thermal bridges, hidden damp and water ingress.
The survey is best performed in winter, when the temperature differential between inside and outside is largest (BS EN 13187 recommends at least 10°C ΔT). A typical domestic survey takes 1–2 hours on site and produces a report with annotated thermal images.
Identify exactly where heat is escaping so the retrofit design targets the worst areas first — better ROI than blanket measures.
Verify that loft, cavity or external wall insulation has been installed without gaps. Catches sloppy workmanship before sign-off.
Locate the source of recurring mould or staining when a visual inspection can't find the cause.
Spot construction defects before the build warranty expires; quantify them with blower-door pressure differentials.
EPC, retrofit assessment, thermal imaging — book individually or grab the Bundle and save up to £300. Matched in 60 seconds to TrustMark-registered assessors.