Roof lanterns in Harrow: what is involved?
Thinking about roof lanterns in Harrow? The short answer: hipped glass lanterns that lift the ceiling of orangeries and extensions. The longer answer depends on your roof, which is why we survey before we price.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Roof lanterns suit rooms that need height as well as light.
Harrow sits about 4 km from Wembley and 4 km from Northolt, and we cover the whole HA2 postcode district and the roads in between.
Choices for your Harrow project
- Opening vents with electric control
- Internal and external colours
- Rectangular, square or bespoke sizes
- Solar-control or self-cleaning glass
- Aluminium or uPVC systems
- Classic look that suits period and modern homes
- Slim aluminium bars, more glass
Before you order: points to check
- Larger lanterns may need a steel or timber ring beam
- Some designs project above the roof enough to affect planning on certain houses
Do you need permission in Harrow?
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. 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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Read the planning permission guide before you commit to a design.
Guide prices for Harrow
Prices below are shown including and excluding VAT. In Harrow, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
What happens next
- Tell us what you have. Send the HA2 postcode, a rough size and a couple of photos.
- 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.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
More we do in Harrow
Common questions
Do they leak?
Modern lanterns are sealed systems. Leaks usually trace back to the kerb or roof membrane detail, which we form and check ourselves.
Aluminium or uPVC?
Aluminium gives slimmer bars and a longer life; uPVC costs less. We fit both.
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 Harrow?
Yes. We survey and fit roof lanterns in Harrow and across Greater London. Send your postcode and we will offer a survey date when we reply.
How do I book a survey in Harrow?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
