What do conservation rooflights in Trowbridge involve?
Thinking about conservation rooflights in Trowbridge? The short answer: slim, low-profile steel-look rooflights for period and listed roofs. The longer answer depends on your roof, which is why we survey before we price.
Barn and chapel conversions in the South West often need bespoke or shaped rooflights to suit the original structure. In Trowbridge, as anywhere, conservation rooflights are the usual choice for slate and plain-tile roofs where a quiet roofline matters.
Trowbridge sits about 8 km from Melksham and 12 km from Bath, and we cover the whole BA14 postcode district and the roads in between.
What you can choose
- Toughened or laminated double glazing
- Flashings for slate or plain tile
- Central vertical glazing bar
- Steel or aluminium frames
- Manual or electric opening
- Double glazed behind a period look
- Steel or aluminium frame in black or grey
Things we check at survey
- Lead or matching flashings may be required
- Projection above the roof line is limited — usually as flush as possible
Consents for conservation rooflights 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. 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.
Conservation rooflights 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 |
|---|---|---|
| Large or electric conservation rooflight | £2,755 – £4,195 | £2,295 – £3,495 |
| Standard conservation rooflight Typical | £2,035 – £2,755 | £1,695 – £2,295 |
| Small conservation rooflight | £1,795 – £2,155 | £1,495 – £1,795 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Trowbridge address.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- 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 Trowbridge
Common questions
Do I need consent for a conservation rooflight?
On a listed building you need listed building consent. In a conservation area, check with the council — many areas have Article 4 directions affecting roof alterations.
Do they suit slate roofs?
Yes — flashings are made for slates and for plain tiles.
Can they open?
Yes, most are top-hung or side-hung for ventilation and cleaning, with manual or electric operation.
Can you work alongside my builder in Trowbridge?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Is the survey in Trowbridge free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
