Skylight installation in St Austell: what is involved?
Skylight installation in St Austell means survey, supply and fit — new openings, extensions and fit-only work. We cover the PL25 district and the rest of Cornwall, 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. In St Austell, as anywhere, skylight installation is the usual choice for new extensions, new openings and fit-only jobs.
Jobs in St Austell 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.
Options we can specify in St Austell
- Internal plaster reveal
- New openings with joist trimming
- Supply and fit
- Upstands and flashings
- Electrics coordination
- Free survey for new installations
- Fixed price in writing before work
What to check first
- Structural changes may need an engineer's check
- Work at height is planned with suitable access
Planning and building rules for St Austell
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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. 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.
Guide prices for St Austell
Guide prices for skylight installation in St Austell 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 |
|---|---|---|
| New opening in an existing roof, supply and fit | £2,395 – £5,395 | £1,995 – £4,495 |
| Supply and fit into a new extension Typical | £1,435 – £3,595 | £1,195 – £2,995 |
| Fit only, customer-supplied unit | £595 – £1,195 | £495 – £995 |
From enquiry to finished job
- Get in touch. Use the form, WhatsApp or the guide-price tool with your St Austell address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Neighbouring towns
Related work in St Austell
Questions about skylight installation in St Austell
Is the survey free?
Yes, for new installations. Repair visits are charged.
Do you fit rooflights bought elsewhere?
Yes. We check the product and the opening first, and our workmanship terms cover the fitting rather than the product.
Do I need a structural engineer?
For new openings that cut joists or rafters, a structural check is sensible and building control may ask for calculations.
Can you work alongside my builder in St Austell?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Is the survey in St Austell free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
