Electric opening rooflights in Cornwall: the essentials
Across Cornwall, our electric opening rooflights work covers hinged rooflights that open on an electric actuator for fresh air. Survey first, fixed price second, fitting third.
Stone cottages, slate roofs and conservation areas are common in the South West, and conservation-profile rooflights keep the roofline quiet. Many South West towns mix Georgian and Victorian terraces with modern estates, so the right product differs street by street.
Towns in Cornwall
Specification options in Cornwall
- Electric actuator with wall switch or remote
- Rain and wind sensor
- Smart-home or app control (manufacturer dependent)
- Frame colour to match your doors
- Integral blind
- Electric opening — no poles or winding
- Clears cooking steam and summer heat at ceiling level
Planning and building rules in England
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.
Guide prices
Prices below are shown including and excluding VAT. In Cornwall, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large with rain sensor and blind | £4,195 – £5,995 | £3,495 – £4,995 |
| Mid-size electric with rain sensor Typical | £2,995 – £4,195 | £2,495 – £3,495 |
| Small manual or electric opening unit | £2,395 – £3,115 | £1,995 – £2,595 |
How the job runs
- Tell us about the roof. Send the postcode, rough sizes and a photo or two through the form, WhatsApp or the guide-price tool.
- Free survey. For new installations a surveyor measures the opening, checks the roof build-up and talks through glass and options.
- Fixed written quote. You get the product, the work and the price in writing. Nothing is ordered or paid for until you agree.
- Fitting and handover. We fit, seal and make good, then hand over product data, warranties and any certificate paperwork.
Opening rooflights in nearby areas
Common questions
Can it open in a power cut?
Most electric units stay where they are during a power cut. Some manufacturers offer a manual override or battery backup — we will tell you which option the chosen model has.
Is it secure when open?
An opening rooflight is a vent, not an access hatch, so the gap is small. For security, close it when the house is empty — a rain sensor does not lock the unit.
Can I control it from my phone?
Some ranges link to smart-home hubs or their own app. If that matters, say so at survey and we will specify a compatible model.
Does it need an electrician?
The rooflight wiring needs a suitable supply. We can arrange it, or your own electrician can provide the spur and we connect the unit.
Do you fit electric opening rooflights across Cornwall?
Yes. We survey and fit electric opening rooflights across Cornwall, including Redruth, Falmouth, St Austell.
