Planning Retrofit Work in Surrey? Start With a Proper PAS 2035 Assessment

Insulate a wall the wrong way, or draught-proof a house without fixing the ventilation, and you can turn a cold room into a damp one. A PAS 2035 retrofit assessment is the check that happens before any of that work starts, not after someone’s already pulled up the floorboards.
Current Rate: £165.00 – £200.00
Why Retrofit Work Goes Wrong Without This Step
- The Wrong Measure: Insulating a solid wall on the wrong side, or sealing a house too tightly without extra ventilation, can trap moisture where it has nowhere to go.
- The Grant Rejection: Most retrofit funding — ECO4, GBIS, the Home Upgrade Grant — won’t release money without a PAS 2035-compliant assessment sitting behind the application.
- The Comeback Job: Skip the survey and you’re the one paying twice: once for the work, and again for the damp patch or mould that turns up six months later.
Why Choose Our Retrofit Assessment Service
We’re PAS 2035 accredited retrofit assessors, and we look at the whole building — walls, roof, ventilation, heating — before recommending anything. No cookie-cutter measure lists, and no upselling work your property doesn’t need.
What You Get
- Full Property Survey: a walk-through covering fabric, ventilation, and heating, not just a desktop calculation.
- PAS 2035 Compliant Report: the exact document funders and installers ask for.
- RdSAP/SAP Assessment: the energy calculation behind your improvement options.
- Condensation Risk Check: assessed against BS 5250, so ventilation gets addressed alongside insulation.
- Medium-Term Improvement Plan: a phased plan you can hand straight to a grant application or a contractor.
Serving Retrofit Assessments in Surrey, Brighton, Morden & Beyond
We carry out retrofit assessments face-to-face across the South East:
Surrey: Guildford, Woking, and Epsom.
South London: Morden, Sutton, and Croydon.
Coastal: Brighton & Hove and surrounding Sussex areas.
Accredited Assessments at a Transparent Price
No inflated call-out fees and no pressure to book extra work you don’t need — just an accredited assessment from someone who has to stand behind the report.
Current Rate: £165.00 – £200.00