Dormers & Rooflights in Camden Town

A rooflight sitting flush or near-flush with the roof slope generally needs planning permission only if it projects more than 15cm above the roof surface, sits higher than the roof ridge, or falls on a front-facing slope in an area covered by an Article 4 direction. On rear slopes outside conservation constraints, rooflights are often achievable without a planning application at all — making them the quickest way to bring daylight into a loft that already has adequate head height.

A rooflight conversion that leaves you short of usable floor space isn't really a saving if a second, larger project follows later, and a dormer pushed through on a roof — or a street — that doesn't suit one can mean a longer planning process for a result that doesn't match the extra time and cost. We size the recommendation to what the space will actually be used for and what the property and its conservation status will realistically support.

A dormer window typically requires planning permission if it's on a front roof slope, rises above the original ridge height, or — for a terraced house — adds more than 40 cubic metres of volume to the roof (50m³ for other house types). Properties inside a conservation area lose most of these automatic allowances, meaning a full application is usually needed regardless of size. We handle the drawings, the supporting statement, and liaison with Camden's planning team as part of the design phase.

A large part of our coverage area — Primrose Hill, South Hampstead, Bartholomew Estate, Dartmouth Park, and pockets around King's Cross and Mansfield — sits within a conservation area. This doesn't rule out a dormer or rooflight conversion; it changes how it needs to be designed. Set-backs from party walls, matching roof materials (slate, hanging tiles), and keeping the dormer visually "subordinate" to the host roof are the details that get planning officers to approve rather than reject an application.