Conservation rooflights in Lewisham: what is involved?
Our conservation rooflights service in Lewisham covers slim, low-profile steel-look rooflights for period and listed roofs. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Typical uses for conservation rooflights include period, listed and conservation-area roofs.
Lewisham is around 8 km from central London, and we survey and fit throughout that part of Greater London, including the SE13 district.
What you can choose
- Blinds
- Steel or aluminium frames
- Manual or electric opening
- Central vertical glazing bar
- Flashings for slate or plain tile
- Suits slate and plain-tile roofs
- Traditional slim profile, sits low in the roof
What to check first
- Conservation officers may specify size and position
- Projection above the roof line is limited — usually as flush as possible
Do you need permission in Lewisham?
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Lewisham
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or electric conservation rooflight | £2,755 – £4,195 | £2,295 – £3,495 |
| Standard conservation rooflight Typical | £2,035 – £2,755 | £1,695 – £2,295 |
| Small conservation rooflight | £1,795 – £2,155 | £1,495 – £1,795 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Conservation rooflights near Lewisham
Other services in Lewisham
Common questions
Do I need consent for a conservation rooflight?
On a listed building you need listed building consent. In a conservation area, check with the council — many areas have Article 4 directions affecting roof alterations.
Do they suit slate roofs?
Yes — flashings are made for slates and for plain tiles.
Can they open?
Yes, most are top-hung or side-hung for ventilation and cleaning, with manual or electric operation.
Is the survey in Lewisham free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in Lewisham?
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line.
