Windows for a Listed Building or Conservation Area

Listed building consent and conservation area rules are the reason most period window projects stall. The good news is that officers are broadly consistent about what they will accept, so the specification can be got right before the application goes in.

We work on Grade II listed and conservation area properties across Devon, Cornwall, Dorset and Somerset and supply drawings and product documentation for consent applications.

Listed building vs conservation area

If the building is listed, replacing windows almost always needs listed building consent, including like for like on some authorities. Doing it without consent is an offence, not just a planning problem.

In a conservation area the building itself may not be listed. Controls usually bite on elevations facing a highway or public space, and an Article 4 direction can extend that to the whole property.

The specification that usually gets approved

• Timber frames rather than uPVC on principal elevations
• Slim double glazed units, commonly around fourteen millimetres overall
• Flush casements or correctly weighted sliding sashes
• Putty line or slim bead detailing rather than chunky beads
• True or integral glazing bars matching the original pattern
• Traditional colours, often off whites, heritage greens and greys

The practical route through

Survey and photograph every opening, record the existing profiles, then agree the specification before the application. Officers respond much better to a drawn proposal that copies the original than to a product brochure.

Where full replacement will not be consented, refurbishment plus draught sealing and secondary glazing is often accepted and can transform comfort without touching the frontage.

Questions people ask