uPVC Windows & Doors for Conservation Areas

The Timber Alternative

What planning officers look for

When assessing replacement windows in a conservation area, planning authorities focus on appearance, not material. The key factors are profile dimensions, sightline widths, joint finish, colour, and glazing. Timberlook flush casement and flush sash windows are specifically designed to match these criteria — the sash sits level with the frame, mimicking traditional timber behaviour, while concealed trickle vents avoid the exposed canopies that planning officers commonly reject on standard uPVC frames.

Approved across the UK — including Cotswold Council

Gaining approval for uPVC windows in a conservation area can be difficult. Here's what one heritage officer said after reviewing our flush casement windows on a live project:

"[Timberlook] uPVC units have been accepted as a variation on Condition 11, they are considered to successfully mimic traditional flush casements, and care has been taken over details such as the sill and trickle ventilation."
— Heritage Officer, Cotswold Council

Our flush casements have also satisfied planning officers on projects outside designated conservation areas governed by Article 4 directions. If you need help preparing a product specification for your planning officer, our team can assist.