Roof lanterns in Purley: what is involved?
Thinking about roof lanterns in Purley? 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.
Many London roofs are reached only through the house or over neighbouring property, so lifting heavy glass is planned at survey rather than on the day. Roof lanterns suit rooms that need height as well as light.
Purley sits about 3 km from Coulsdon and 3 km from South Croydon, and we cover the whole CR8 postcode district and the roads in between.
Choices for your Purley project
- Aluminium or uPVC systems
- Opening vents with electric control
- Internal and external colours
- LED lighting in the plaster box
- Solar-control or self-cleaning glass
- Slim aluminium bars, more glass
- Double or triple glazed with solar-control options
Things we check at survey
- Larger lanterns may need a steel or timber ring beam
- Plaster-box depth affects how the lantern looks from below
Planning and building rules for Purley
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.
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. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
Roof lanterns prices in Purley
Guide prices for roof lanterns in Purley 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 |
From enquiry to finished job
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Purley address.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
More we do in Purley
Questions about roof lanterns in Purley
Aluminium or uPVC?
Aluminium gives slimmer bars and a longer life; uPVC costs less. We fit both.
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.
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 do I book a survey in Purley?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Is the survey in Purley free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
