How we approach sliding rooflights in Crawley
We handle sliding rooflights across West Sussex, including Crawley. In short: box rooflights whose glass lid slides back for walk-out roof access. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Across the South East, single-storey kitchen extensions on 1930s semis and post-war detached houses are where most flat rooflights and lanterns go. Typical uses for sliding rooflights include walk-out access where a hatch would feel cramped.
We cover all of Crawley and the RH11 district, and nearby Horley and Horsham.
Specification options
- Anthracite, black or RAL frames
- Rain sensor
- Electric drive with safety edge
- Box (glazed sides) or flat sliding lid
- Integrated balustrade on some ranges
- Full-width, walk-out access to a roof terrace
- Daylight down the stair when closed
Things we check at survey
- The stair opening and headroom must meet Building Regulations
- Electric units need a dedicated supply and commissioning
Consents for sliding rooflights in Crawley
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. 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.
What do sliding rooflights cost in Crawley?
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large box slider with electric drive | £11,995 – £20,395 | £9,995 – £16,995 |
| Standard box slider Typical | £8,995 – £13,195 | £7,495 – £10,995 |
| Flat sliding lid | £7,195 – £9,595 | £5,995 – £7,995 |
How the job runs
- Tell us what you have. Send the RH11 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Crawley, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Sliding rooflights near Crawley
Related work in Crawley
Questions about sliding rooflights in Crawley
What if it is raining?
Fitted with a rain sensor, an electric unit closes automatically. Most also have a manual override for power cuts.
Is a sliding rooflight better than an access hatch?
For daily use, usually yes — you walk out under open sky instead of climbing through a hinged hatch. A hatch costs less and suits occasional access.
Does it need planning permission?
A box unit that projects above the roof plane can need planning permission, especially on the front of a house or in a conservation area. We check before you order.
Do I need to be at home for the survey in Crawley?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Will I need planning permission in Crawley?
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.
