How we approach roof lanterns in St Helens
We handle roof lanterns across Merseyside, including St Helens. In short: hipped glass lanterns that lift the ceiling of orangeries and extensions. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Exposed hillside towns in the North West need flashing and seal details that cope with wind-driven rain. Roof lanterns suit orangeries, kitchen-diners and single-storey extensions.
We work across Merseyside, including St Helens, and in neighbouring towns such as Prescot and Ashton-in-Makerfield. Access, parking and how the glass reaches the roof are all checked at the survey.
Options we can specify in St Helens
- Internal and external colours
- Aluminium or uPVC systems
- Opening vents with electric control
- Rectangular, square or bespoke sizes
- Solar-control or self-cleaning glass
- Light from every angle across the day
- Classic look that suits period and modern homes
Before you order: points to check
- Plaster-box depth affects how the lantern looks from below
- Larger lanterns may need a steel or timber ring beam
Do you need permission in St Helens?
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line. 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. 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.
Roof lanterns prices in 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 |
|---|---|---|
| Large or bespoke aluminium lantern | £5,995 – £10,795 | £4,995 – £8,995 |
| Mid-size aluminium lantern (2 × 3 m) Typical | £3,955 – £5,995 | £3,295 – £4,995 |
| Small lantern (1 × 2 m) | £2,995 – £3,955 | £2,495 – £3,295 |
The process, step by step
- Tell us what you have. Send the WA10 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits St Helens, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
More we do in St Helens
Questions about roof lanterns in St Helens
How big can a lantern be?
Aluminium systems go to around three by six metres in standard ranges; larger sizes are made to order.
Aluminium or uPVC?
Aluminium gives slimmer bars and a longer life; uPVC costs less. We fit both.
Can a lantern go on an existing extension?
Yes, if the flat roof structure can be opened up and trimmed. We check joists and the roof build-up at survey.
Do you fit roof lanterns in St Helens?
Yes. We survey and fit roof lanterns in St Helens and across Merseyside. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in St Helens?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
