Kent
Roof lanterns and rooflights for rear extensions in Kent
Lanterns, flat rooflights and walk-on glass that bring light deep into the plan. Across Kent we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Maidstone, Gillingham and Chatham.
Rear extensions in Kent gain most from a rooflight placed against the old back wall, where the room would otherwise be darkest. Commuter semis and detached houses make up much of Kent, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
What does it cost in Kent?
As a guide, £2,200–£4,500 including VAT. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
What approvals does it need in Kent?
New fabric must meet Approved Document L (2021 edition incorporating 2023 amendments): walls 0.18, roof 0.15 and floor 0.18 W/m²K, windows 1.4 W/m²K or Band B. Under the simple route, new windows, doors and rooflights should not exceed 25% of the extension floor area plus any openings removed; more glass is possible with a whole-house calculation.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.
Where in Kent do we work?
FAQ
Questions people ask
Lantern or flat rooflight?
A lantern gives height and a feature; a flat rooflight is cleaner and lower-profile.
Do rooflights count towards the 25% glazing limit?
Yes, in England's simple route; more is possible with a calculation.
Can a rooflight open?
Yes, manually or electrically, with rain sensors.
Do you cover all of Kent?
We cover 31 towns and districts in Kent, including Maidstone, Gillingham and Chatham.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.