What does skylight replacement in Marlborough involve?
Skylight replacement in Marlborough means replacing tired domes and failed glass with a modern rooflight. We cover the SN8 district and the rest of Wiltshire, with a survey before any price is fixed.
Western coasts take wind-driven rain, so we pay close attention to upstand height and flashing laps on exposed roofs. Think of skylight replacement for older extensions due a modern rooflight.
Jobs in Marlborough are planned around access: whether the roof can be reached from the garden, whether a hoist or crane is needed, and where we can park. We check this when we measure.
Choices for your Marlborough project
- Like-for-like size replacement
- Dome to flat glass upgrade
- Fixed to electric opening
- Roof window replacement in pitched roofs
- Misted glass unit replacement only
- Better thermal performance
- Cures most chronic leaks
What to check first
- Old glass and domes are disposed of responsibly
- Enlarging the opening changes the structure and may need approval
Do you need permission in Marlborough?
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. Listed buildings need listed building consent, flats have no householder permitted development rights, and an Article 4 direction can remove the rights in some conservation areas.
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.
What does skylight replacement cost in Marlborough?
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Replacement with upstand rebuild and opening unit | £2,995 – £4,795 | £2,495 – £3,995 |
| Dome to flat glass upgrade Typical | £1,915 – £2,995 | £1,595 – £2,495 |
| Like-for-like glass rooflight | £1,555 – £2,155 | £1,295 – £1,795 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Measure and check. A surveyor visits Marlborough, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Nearby towns
Related work in Marlborough
Skylight replacement in Marlborough: questions
Can I go bigger when replacing?
Possibly. Enlarging the opening means trimming joists, so we check the structure first.
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
Can you replace only the misted glass?
Sometimes, if the frame is sound and the maker supplies replacement units. Often a complete new rooflight costs little more and performs better.
Can you work alongside my builder in Marlborough?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do I need to be at home for the survey in Marlborough?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
