Listed building consent and windows

A common and expensive misunderstanding is that listing protects a facade, or the parts of a building that can be seen from the street. It does not. Listing applies to the whole of the building, inside and out, and to structures within its curtilage.

Windows are rarely incidental to that. In most period buildings they are among the most significant surviving elements: their proportions set the rhythm of the elevation, and their glazing, horns and glass carry the date of the building more legibly than almost anything else. Work to them is very often work that requires consent.

Applications concerning windows tend to succeed or fail on evidence rather than on intention. An officer assessing a proposal is asking what is there now, how much of it is original, what condition it is actually in, and whether the proposed intervention is the least that will answer the problem.

A survey answers the first three of those questions with photographs and description rather than assertion. Where an application proposes replacement, the case rests on demonstrating that repair was properly considered and found insufficient, and that is a much stronger position when the assessment was made by someone with no interest in which way it went.

It is worth saying plainly that a report does not guarantee consent. The decision rests with the local planning authority, and a well-evidenced application can still be refused.