Large roof lanterns in Chelmsford
Choosing a large roof lantern for a house in Chelmsford? Start with the guide prices below, check the planning and building regulations notes for England, then ask for a fixed quote with delivery to CM1.
Price a large roof lantern for Chelmsford
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Large roof lanterns for Chelmsford homes
Lanterns of three metres and more for open-plan extensions, with intermediate rafters.
Winter daylight in Chelmsford lasts about 7h 47m, against 16h 41m in midsummer. Glass in the roof makes the most of the short days, and the right glass keeps the long ones comfortable.
- Delivered as a frame kit with glass
- Lengths from about three to six metres
- Fitting can be quoted on request
Delivery and fitting in Chelmsford
Your quote includes delivery to Chelmsford at a confirmed price, usually to the kerbside or driveway on pallets.
Need it fitted? Send your postcode and we will confirm whether we have fitting cover in Chelmsford before quoting.
Delivery to CM1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Large roof lantern prices for Chelmsford
Typical guide prices for large roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 2000 × 3000 mm | 6.00 m² | £3,195–£3,695£2,662 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,095–£4,795£3,412 ex VAT from | Configure |
| 2500 × 4000 mm | 10.00 m² | £4,895–£5,695£4,079 ex VAT from | Configure |
| 3000 × 4000 mm | 12.00 m² | £5,695–£6,595£4,746 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour. Your fixed price is confirmed in writing on your quote before you order.
Planning and building regulations for Chelmsford
In England, building regulations energy guidance sets a limiting U-value of 2.2 W/m²K for new and replacement rooflights in existing homes, measured horizontally.
Lanterns on permitted development extensions are part of the extension's height limits. Adding one to an existing roof is different: over 150 mm of projection can mean a planning application.
Building regulations in Chelmsford are checked by your local authority building control team or a registered building control approver. Replacing a rooflight in an existing home is building work. Installers registered with a competent person scheme can self-certify; otherwise building control must be involved.
Sources: Approved Document L, GOV.UK · Planning Portal
Questions from Chelmsford
Do large lanterns overheat a room?
A large area of south-facing glass can make a room warm on sunny days. Solar-control glass, an opening vent and good background ventilation all help. Our guide on overheating explains the options.
Does a large lantern need structural calculations?
The roof structure around it usually does. Your engineer or building control body will want the lantern's weight and the opening size.
Can you fit a roof lantern in Chelmsford?
We can quote for fitting where we have cover. Send your postcode and photos of the roof and kerb, and we will confirm before quoting.
Do I need planning permission for a roof lantern in Chelmsford?
Often not, but it depends on the roof, the property and whether it is listed or in a conservation area. Check with your district, borough or unitary council before ordering.