How we approach skylight installation in St Helens
Skylight installation in St Helens means survey, supply and fit — new openings, extensions and fit-only work. We cover the WA10 district and the rest of Merseyside, with a survey before any price is fixed.
Rear kitchen extensions on North West semis often have small domes from decades ago that leak or have yellowed. Think of skylight installation for new extensions, new openings and fit-only jobs.
From St Helens to Prescot, Ashton-in-Makerfield and Huyton, the same survey-first process applies: measure, specify, fix the price, then fit.
What you can choose
- Electrics coordination
- New openings with joist trimming
- Fit only (customer-supplied units)
- Supply and fit
- Upstands and flashings
- Fixed price in writing before work
- Free survey for new installations
What to check first
- Fit-only work relies on the product being suitable and complete
- Building Regulations approval (a building warrant in Scotland) may be needed
Consents for skylight installation in St Helens
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 Helens
These are typical supply-and-fit ranges. For an address in St Helens, 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 |
|---|---|---|
| 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 |
How the job runs
- Tell us what you have. Send the WA10 postcode, a rough size and a couple of photos.
- 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.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in St Helens
Common questions
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 you work with builders?
Yes — on new extensions we fit to the builder's programme once the upstand or roof is ready.
Is the survey free?
Yes, for new installations. Repair visits are charged.
Is the survey in St Helens free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in St Helens?
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.
