Dome rooflight replacement across Cornwall

Guide prices in Cornwall

Like-for-like dome

£395 – £695including VAT at 20%

Old dome taken off, new multi-skin dome fixed to the sound existing kerb

Dome with kerb adaptor

£695 – £1,195including VAT at 20%

New dome where the kerb needs an adaptor or packing

Upgrade to glass

£1,095 – £1,695including VAT at 20%

Dome swapped for a double-glazed glass rooflight on the existing sound kerb, as in our replacement service

Guide ranges for supply & fit, per dome; building control notice fee extra on homes in England and Wales. Your price is fixed in a written quote after we have seen photos or surveyed. Scaffold, access towers or a crane are priced separately if the job needs them, and building control fees, where a job needs them, are shown as their own line.

Towns we list in Cornwall

Coverage in Cornwall works by postcode, not by distance from an office. Give us the full postcode and we will confirm whether it is standard cover, as it is for most of England, or one of the few remote and island areas handled by arrangement. Either way, you get a written quote before any work is booked, with travel included in the price.

The Isles of Scilly are covered by arrangement, with travel priced into the quote before you commit.

What we do on the day

Inside checked for drips and the trim refitted
New multi-skin dome or glass unit fixed and sealed
Kerb checked for rot, size and height before the new unit goes on
Fragile dome safety — We treat old domes as fragile at all times.
Is the kerb sound? — We check each kerb for rot and movement before quoting a dome swap.

Rules that apply in England

Replacing a rooflight in an English home is a controlled fitting: it has to be self-certified by a scheme-registered installer or notified to building control. We are not registered with a competent person scheme, so replacements we fit are notified with a building notice, and the new unit has to meet current energy limits. Adding a new one usually means a building regulations application, because joists or rafters are trimmed. On the planning side, most house rooflights are permitted development if they project 0.15 m or less; on a side slope the glass must be obscured and fixed unless the opening part is over 1.7 m above the floor.

Common questions in Cornwall

How long does fitting take?

Fitting a dome rooflight into an existing, correctly sized opening is often a day's work. New openings take longer, because joists or rafters need trimming, an upstand or flashing has to be built or fitted, and the inside needs finishing. Large units that need lifting gear, and days lost to rain, can stretch things further. Your written quote gives a realistic estimate for your roof.

What if my roof opening is the wrong size for the dome rooflight?

We find out before the fitting day, not on it. If the opening is slightly out, it can usually be adjusted by trimming or by packing out the upstand. If it is a long way off, the choice is between altering the opening and changing the unit. Bear in mind that rooflights are often sold by builder's opening size rather than external size, so check which one your measurement refers to.

Do you cover Cornwall?

Yes, with some addresses by arrangement. Mainland towns are covered in the usual way. Island and remote addresses are taken on case by case, with travel, dates and any ferry costs confirmed in the written quote before you commit.

Dome rooflight replacement in Cornwall