Roof lanterns in Coulsdon: what is involved?
For Coulsdon homes and buildings we offer roof lanterns: hipped glass lanterns that lift the ceiling of orangeries and extensions. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. In Coulsdon, as anywhere, roof lanterns are the usual choice for orangeries, kitchen-diners and single-storey extensions.
From Coulsdon to Purley, Banstead and Wallington, the same survey-first process applies: measure, specify, fix the price, then fit.
Specification options
- Internal and external colours
- Rectangular, square or bespoke sizes
- Opening vents with electric control
- LED lighting in the plaster box
- Aluminium or uPVC systems
- Slim aluminium bars, more glass
- Adds visual height to a single-storey room
Before you order: points to check
- Needs a strong, level kerb or upstand
- Some designs project above the roof enough to affect planning on certain houses
Planning and building rules for Coulsdon
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge. 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. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Our planning guide covers each nation in more detail.
What do roof lanterns cost in Coulsdon?
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 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 |
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.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in Coulsdon
Common questions
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.
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.
How big can a lantern be?
Aluminium systems go to around three by six metres in standard ranges; larger sizes are made to order.
Do you fit roof lanterns in Coulsdon?
Yes. We survey and fit roof lanterns in Coulsdon and across Greater London. Send your postcode and we will offer a survey date when we reply.
Do I need to be at home for the survey in Coulsdon?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
