Define what like-for-like actually preserves
The phrase can hide important differences. A replacement handle may match colour but not dimensions; a new vent may alter the opening; modern timber sections may change a visible profile. Record material, size, finish, fixing position and operation before removal. Photograph less obvious evidence such as hinge recesses, screw centres and weather seals. Ask the relevant authority whether the proposed work is repair, replacement or alteration in its terms. Where a sound component can be adjusted or locally repaired, that may retain more fabric, but it must still be safe and serviceable. Do not use a superficial visual match to justify incompatible hardware or conceal decay. A clear schedule makes quotation and approval refer to the same physical detail.

