PAS 2035:2023 is the British standard governing domestic retrofit. Before any government-funded energy upgrade can be installed, a qualified Retrofit Assessor must survey the whole house. Envirocept delivers the complete PAS 2035 assessment package that installers, Retrofit Coordinators and funders require.
What the assessment includes
- Occupancy Assessment — how the household actually uses energy, hot water and heating.
- Property Condition Survey — structural condition, damp, mould and repair flags that must be resolved before measures are installed.
- Ventilation Audit — ensuring indoor air quality is protected when the building is made more airtight.
- RdSAP Energy Evaluation — the baseline energy model your Retrofit Coordinator specifies improvements against.
Unlock ECO4 and Boiler Upgrade Scheme funding
Qualifying households can access ECO4 support for insulation and heating measures, and the Boiler Upgrade Scheme contributes £7,500 toward an air source heat pump installation. Solar and heat pump installers use our assessments to satisfy funding criteria for their customers — we work directly with installer partners across the UK.
What's included
- Occupancy Assessment (actual household energy use)
- Property Condition Survey (checking for damp & mould)
- Ventilation System Audit (ensuring indoor air hygiene)
- Full RdSAP energy evaluation & baseline report
- Essential pre-requisite for coordinator specs