Skylight installation in Trowbridge: what is involved?
Skylight installation in Trowbridge means survey, supply and fit — new openings, extensions and fit-only work. We cover the BA14 district and the rest of Wiltshire, with a survey before any price is fixed.
Stone cottages, slate roofs and conservation areas are common in the South West, and conservation-profile rooflights keep the roofline quiet. Skylight installation suits builders' projects and retrofits into finished roofs.
We work across Wiltshire, including Trowbridge, and in neighbouring towns such as Melksham and Bath. Access, parking and how the glass reaches the roof are all checked at the survey.
Choices for your Trowbridge project
- Fit only (customer-supplied units)
- Electrics coordination
- New openings with joist trimming
- Upstands and flashings
- Supply and fit
- Fixed price in writing before work
- Free survey for new installations
Things we check at survey
- Fit-only work relies on the product being suitable and complete
- Building Regulations approval (a building warrant in Scotland) may be needed
Planning and building rules for Trowbridge
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. 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. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
Our planning guide covers each nation in more detail.
Skylight installation prices in Trowbridge
Prices below are shown including and excluding VAT. In Trowbridge, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Trowbridge address.
- Measure and check. A surveyor visits Trowbridge, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Neighbouring towns
Related work in Trowbridge
Skylight installation in Trowbridge: questions
How long does installation take?
Fitting into a prepared upstand takes about a day. A new opening in an existing roof, including making good, often takes two to three days.
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.
Who handles building control?
We tell you which route applies — building control approval, a building warrant in Scotland, or in England and Wales self-certification by a registered competent person — and supply the product data.
Is the survey in Trowbridge free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in Trowbridge?
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.
