Opening roof lanterns in Chelmsford
Order opening roof lanterns for delivery to Chelmsford and nearby Billericay and Witham. Every lantern is checked against your measurements before it is ordered, and the price on your quote is fixed for the specification shown; any extra work is agreed with you first.
Price an opening roof lantern for Chelmsford
Postcode and kerb size first, then your details. We reply with a fixed written quote.
Opening roof lanterns for Chelmsford homes
Electric opening vents to let warm air out at the highest point of the room.
At 51.74°N, Chelmsford sees roughly 7h 47m of daylight in late December and 16h 41m in late June. A lantern faces the bright overhead sky all year, so it brings in useful light even on the short, grey days.
- Helps keep kitchens cool in summer
- One or two vents depending on size
- Plan the power supply early
Delivery and fitting in Chelmsford
Delivery to CM1 is quoted for your postcode and arrives on pallets at the kerbside, so plan enough people to unload.
Fitting in Chelmsford can be quoted on request by installers working under S&K, subject to cover for your postcode.
Delivery to CM1 is standard mainland delivery, priced for your postcode and confirmed in writing before you order.
Opening roof lantern prices for Chelmsford
Typical guide prices for opening roof lanterns, supply only and including VAT:
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1500 mm | 1.50 m² | £1,990–£2,190£1,658 ex VAT from | Configure |
| 1500 × 2500 mm | 3.75 m² | £2,990–£3,390£2,492 ex VAT from | Configure |
| 2000 × 3000 mm | 6.00 m² | £3,890–£4,390£3,242 ex VAT from | Configure |
| 2000 × 4000 mm | 8.00 m² | £4,790–£5,490£3,992 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour, including one electric vent. Your fixed price is confirmed in writing on your quote before you order.
Planning and building regulations for Chelmsford
England's Approved Document L caps the U-value of new or replacement rooflights in existing homes at 2.2 W/m²K, calculated with the glass horizontal.
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
What happens if it rains while the vent is open?
With a rain sensor the vent closes automatically. Without one it stays where you left it, so a sensor is worth having.
Can a vent be added later?
Usually not to an existing fixed lantern. Decide before ordering.
Is it worth having solar-control glass in Chelmsford?
With the midsummer sun about 61.7° high at noon, roof glass in Chelmsford gets strong summer sun. Solar control is recommended for large or south-facing lanterns.
How quickly can I get a roof lantern in Chelmsford?
Stock sizes are typically ready in 5–10 working days, made-to-measure in 3–4 weeks, plus delivery. Your quote gives the date for CM1.