How we approach skylight replacement in Sherborne
We handle skylight replacement across Dorset, including Sherborne. In short: replacing tired domes and failed glass with a modern rooflight. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Many South West towns mix Georgian and Victorian terraces with modern estates, so the right product differs street by street. Skylight replacement suits older extensions due a modern rooflight.
From Sherborne to Yeovil, Dorchester and Bridport, the same survey-first process applies: measure, specify, fix the price, then fit.
What you can choose
- Roof window replacement in pitched roofs
- Fixed to electric opening
- Like-for-like size replacement
- Misted glass unit replacement only
- Upstand rebuild and insulation
- Clearer view and more light
- Usually done in a day
Before you order: points to check
- Upstand and roof condition decide the scope
- Old glass and domes are disposed of responsibly
Planning and building rules for Sherborne
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. 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. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
What does skylight replacement cost in Sherborne?
These are typical supply-and-fit ranges. For an address in Sherborne, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 |
How the job runs
- 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.
- 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
Other services in Sherborne
Common 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.
Do I need building regulations approval to replace a rooflight?
Replacements in existing homes generally need to meet current thermal standards and may need notification or approval. We advise on the route for your job.
How do I book a survey in Sherborne?
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 Sherborne free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
