Listed buildings and conservation areas
An air-source unit is fixed to a listed rear wall. Has the survey consented that fixing?
No. The survey has not consented the fixing of the air-source unit to the listed rear wall. Listing covers the whole building, not a front facade alone, so the rear wall is part of the listed building. Consent is a decision for the planning authority. The visit recorded that a unit is fixed to that wall. It has not granted listed building consent, has not checked that consent exists, and has not approved the brackets, the penetrations or the pipework.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Fixing plant to a listed wall can affect fabric the listing protects. Brackets, chased pipes and a new opening are physical changes. The survey can see they are there. It cannot legalise them. Conservation-area controls, if they also apply, are a further legal layer the inspection does not decide. The mechanism is simple: recording a fixture is not consent. The unit may be properly consented, or it may not. This report does not know which.
Ask the solicitor for any listed building consent, planning permission or listed building consent application that names this unit on the rear wall. Do not treat silence in the survey as approval. A lender may want the consent in the pack. The survey has not measured noise and has not set a noise limit. If the paper is missing, the solicitor takes that up. The inspection will not issue consent afterwards.
What should you ask your surveyor?
- Is the unit fixed through the listed wall or only standing against it?
- Is any listed building consent in the papers for this unit?
- Does listing include the rear wall as well as the front?
What are the typical next steps?
- Ask the solicitor for listed building consent for the unit on the rear wall.
- Do not read the survey as having consented the fixing.
- Keep any planning paper separate from the condition report.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
Does listing stop at the front elevation?
No. Listing covers the whole building, including the rear wall this unit is fixed to. It does not stop at the street front. The survey has not granted consent for the fixing and has not limited listing to the front. The solicitor and the list entry are where the extent is read. The visit only recorded the unit on the wall.
Has the survey measured noise from the outdoor unit?
No. The survey has not measured noise and has not set a limit or a distance. It saw an air-source unit fixed to a listed rear wall and has not consented that fixing. Noise, if it matters to you, is a separate question for the papers and for any specialist. It is not a result this inspection produced.