Listed buildings and conservation areas
Secondary glazing is screwed through the staff bead of a sash in a listed house. What consent has the survey not looked up, and what rot in the bead was only partly seen?
Listed building consent for the secondary glazing has not been looked up, and rot in the staff bead was only partly seen. Screws through the bead of a sash in a listed house are an alteration the inspection can describe. They are not a consent the survey has checked or granted. Historic England explains that listing covers the whole building. Softness in the bead is a timber note from the parts that could be reached. Hidden decay behind the secondary frame was not fully exposed.
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?
The staff bead is the small timber that holds the inner face of the sash. Driving screws through it fixes the secondary glazing, and it also punctures the bead. Where the timber felt soft, that softness is only the face the surveyor could touch. The secondary frame covers the rest. Listing does not stop at the front elevation. It covers the whole building, so this bead is part of what was listed, but the survey has not decided the consent.
Ask the solicitor to check whether listed building consent exists for the secondary glazing, and keep that search separate from the timber note. The survey does not grant consent. If the bead matters, a joiner who understands sash windows can look once the secondary frame is released, which this visit did not do. Do not treat a photograph of screws as either a consent or a full decay survey.
What should you ask your surveyor?
- Which consent for the secondary glazing did you not look up?
- How much of the staff bead could you actually see and probe?
- Did you leave hidden rot behind the secondary frame undescribed?
What are the typical next steps?
- Ask the solicitor whether listed building consent exists for the glazing.
- Treat softness in the bead as a partial timber note.
- Do not read the survey as consent, or as a full decay inspection.
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
If the secondary glazing is neatly fitted, is consent implied?
No. Neat screws show careful fitting, not a consent. Historic England explains that listing covers the whole building. The survey has not looked up consent and does not grant it, however tidy the secondary frame appears. Appearance of the screws is not a search of the planning record.
Does a hard bead at one point clear the sash?
No. Hardness where a probe could reach says nothing about timber hidden behind the secondary frame. The rot note was only partial. The survey has not cleared the rest of the bead or the sash stile. The secondary frame still covers the timber the surveyor could not reach, so the bead is only partly described.