Roof lanterns for Blackheath: the essentials
Roof lanterns in Blackheath means hipped glass lanterns that lift the ceiling of orangeries and extensions. We cover the SE3 district and the rest of Greater London, with a survey before any price is fixed.
Victorian and Edwardian terraces with narrow side returns are typical of much of London, and a glass roof or long flat rooflight is the usual way to keep the back rooms bright once the return is built over. In Blackheath, as anywhere, roof lanterns are the usual choice for orangeries, kitchen-diners and single-storey extensions.
Blackheath sits about 2 km from Greenwich and 3 km from Catford, and we cover the whole SE3 postcode district and the roads in between.
What you can choose
- Solar-control or self-cleaning glass
- Rectangular, square or bespoke sizes
- Internal and external colours
- LED lighting in the plaster box
- Opening vents with electric control
- Slim aluminium bars, more glass
- Can include opening vents
What to check first
- Some designs project above the roof enough to affect planning on certain houses
- Plaster-box depth affects how the lantern looks from below
Planning and building rules for Blackheath
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.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. 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.
Read the planning permission guide before you commit to a design.
What do roof lanterns cost in Blackheath?
Guide prices for roof lanterns in Blackheath are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or bespoke aluminium lantern | £5,995 – £10,795 | £4,995 – £8,995 |
| Mid-size aluminium lantern (2 × 3 m) Typical | £3,955 – £5,995 | £3,295 – £4,995 |
| Small lantern (1 × 2 m) | £2,995 – £3,955 | £2,495 – £3,295 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
Other services in Blackheath
Roof lanterns in Blackheath: questions
Do roof lanterns get hot?
They can in summer if clear glass is used on a south-facing roof. Solar-control glass and an opening vent make a big difference.
Roof lantern or flat rooflight?
A lantern adds height and sky from all sides; a flat rooflight is lower-profile and cleaner from outside. Our guide compares them in detail.
Can a lantern go on an existing extension?
Yes, if the flat roof structure can be opened up and trimmed. We check joists and the roof build-up at survey.
Do you fit roof lanterns in Blackheath?
Yes. We survey and fit roof lanterns in Blackheath and across Greater London. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Blackheath?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
