BEFORE FABRIC, HEATING OR VENTILATION CHANGES

Understand the dwelling before choosing the work.

Retrofit decisions affect a whole home. An assessment gathers the relevant energy, condition and ventilation evidence for the agreed project brief, giving the next stage a better starting point.

Before booking a London assessment

Price and property details

The dwelling, project requirements and assessment outputs determine the price. Include any report requirements supplied by the scheme or project team.

Does the assessment include installation?

An assessment gathers evidence about the existing home. Design, coordination and installation are separate project stages unless the accepted quotation expressly includes them.

Planning a London visit

Tell the team about access, parking or concierge restrictions, the preferred visit and the date you need the report. Availability and turnaround are agreed for the London address.

Official guidance: check the relevant requirements. Reviewed 8 November 2026.

Insulation and roof structure around two skylights in a renovation
Insulation and roof structure around two skylights in a renovation. Illustrative stock photograph, not a completed EPC London job.
ForExisting dwellings
Price routeProject quotation

Start with the project requirements

Tell us why the assessment is being commissioned and who will use it. A privately planned renovation and a particular delivery programme can require different records, formats and follow-up roles. Confirm the expected assessment framework in the scope.

Look at how the home works together

Fabric, heating, ventilation and condition are connected. Information about occupancy and known problems can also matter to the brief. Disclose damp, leaks, defects and earlier work so concerns can be recorded rather than overlooked.

Give the next professional useful evidence

The accepted quotation should say what records are included and how they will be delivered. An assessment can inform coordination and design, but it does not automatically appoint every specialist needed for the later work.

Avoid treating the visit as approval

An assessment does not itself award a grant, approve an installer’s proposal or guarantee a final EPC band. Resolve the relevant constraints and responsibilities before committing to products or installation.

Getting ready

  • Describe the intended programme or renovation.
  • Provide the existing EPC and relevant building records.
  • List known moisture, condition or ventilation concerns.
  • Confirm required outputs with the person coordinating the project.

The output to agree

The assessment records and evidence specified for the project.

Work outside this brief

Funding decisions, retrofit coordination, detailed design, installation and specialist investigations are not automatically included. Each additional role needs its own agreed scope.

Questions about Retrofit Assessment

Does this guarantee eligibility for funding?

No. Funding decisions follow the relevant programme’s rules and evidence requirements.

Can a retrofit assessment replace an EPC?

The outputs have different purposes. Ask which certificates and assessment records your project requires.

Should I mention damp or a previous leak?

Yes. Known condition issues can affect the suitability and sequencing of later improvements.

YOUR NEXT PROPERTY JOB

Put the property details in the right hands.

The form collects the information relevant to this assessment so the instruction can be reviewed.

Open the Retrofit Assessment form
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