Derbyshire
Roof lanterns and rooflights for rear extensions in Derbyshire
Lanterns, flat rooflights and walk-on glass that bring light deep into the plan. Rear extensions in Derbyshire: we cover 22 towns including Derby, Chesterfield and High Peak, with design, approvals and the build under one contract.
Rear extensions in Derbyshire gain most from a rooflight placed against the old back wall, where the room would otherwise be darkest. Red-brick terraces and semis are typical of Derbyshire. Coal-mining legacy areas in parts of the East Midlands can need a Coal Authority check before foundations are designed.
What does it cost in Derbyshire?
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 Derbyshire?
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 Derbyshire 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 Derbyshire?
We cover 22 towns and districts in Derbyshire, including Derby, Chesterfield and High Peak.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.