PAS 2035 Retrofit Assessment

Our Retrofit Assessors are fully accredited with Elmhurst Energy and ECMK, and qualified to PAS 2035 Level 3. With extensive experience—having completed hundreds of assessments for local councils—our team brings the highest level of competence and professionalism to every project. We also hold ABBE Level 3 qualifications in Energy Efficiency for Older and Traditional Buildings.

Comprehensive Retrofit Assessments

A retrofit assessment provides a complete picture of your home’s energy performance and identifies the most effective steps for improvement.
Our assessments typically cost £150–£300, depending on your location and the size or complexity of your property.

Each assessment includes:

• Energy Report – analysing your home’s current energy use

• Condition Survey – evaluating the building’s fabric and any potential issues

• Occupancy Assessment – examining how and when energy is used within your home

Once completed, your assessment is securely lodged in the TrustMark Data Warehouse, where Retrofit Coordinators and other stakeholders can access the information to progress your retrofit project.

A Whole-House Approach

We follow a whole-house, fabric-first methodology—widely recognised as the most effective way to improve energy efficiency.

• Whole-house approach: We take a holistic view of your home, considering how improvements work together and how the building will be ventilated, rather than applying isolated measures.

• Fabric-first approach: We ensure the building’s structure is sound before recommending further improvements and prioritise simple, effective energy-saving actions such as installing low-energy lighting or upgrading to a smart meter.

Understanding PAS 2035

PAS 2035 is the government-endorsed standard for domestic retrofit projects. Created to support the growth of the green energy sector, the standard ensures retrofitting is carried out safely, effectively, and with long-term performance in mind. Because older homes require specialist knowledge—especially when adding insulation—PAS 2035 provides clear guidance to protect homeowners and ensure quality workmanship.

Moving Forward With the Work

If you choose to proceed with the recommended improvements, you should select installers who operate in line with PAS 2035 standards. A qualified Retrofit Coordinator will be required to manage the project and ensure all work is carried out to the correct specification.