Assessment preparation

How to Prepare for a Home Energy Assessment

First confirm which assessment you need. A proposed home is assessed from plans. A completed home normally needs an on-site visit. A general audit may answer a narrower question but does not automatically produce an official rating.

Reviewed 2026-09-01Written for household decisions. Official sources are linked below for rules and program details.
Before you book

Explain the decision the assessment must support

Plan-based assessment

Send coordinated drawings and specifications

Use one drawing revision

Tell the assessor which revision is current. A certificate based on superseded plans can create rework and may not describe the approved design.

On-site assessment

Make the home safe and accessible

After the assessment

Check what you will receive

The quote should name the certificate, report, ratings or recommendations included and explain any follow-up needed. Ask how assumptions, inaccessible areas and missing evidence will be recorded.

Keep the final output with the plans, photos and evidence that support it. Update the assessment when material parts of the design or home change.

Check the source

Current official guidance

Confirm the assessment before collecting every document

The five-minute call checks the property stage, location and required output so you can prepare the right evidence.

Book a five-minute call