What are sliding rooflights?
Across West Sussex, our sliding rooflights work covers box rooflights whose glass lid slides back for walk-out roof access. Survey first, fixed price second, fitting third.
Orangery-style extensions with lanterns are popular across the South East, and solar-control glass makes a big difference on south-facing gardens. Across the South East, single-storey kitchen extensions on 1930s semis and post-war detached houses are where most flat rooflights and lanterns go.
Towns in West Sussex
Options we can specify
- Double or triple glazing
- Electric drive with safety edge
- Box (glazed sides) or flat sliding lid
- Integrated balustrade on some ranges
- Rain sensor
- Full-width, walk-out access to a roof terrace
- Daylight down the stair when closed
Planning and building rules in England
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. 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.
Sliding rooflights prices in West Sussex
These are typical supply-and-fit ranges. For an address in West Sussex, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 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.
Sliding rooflights in nearby areas
Common questions
How heavy is it?
Box sliders weigh hundreds of kilograms, so delivery may need a crane or lifting gear, and the structure must be checked.
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 it lockable?
Yes. Units lock from inside and the drive holds the lid closed.
Can children open it?
Controls can be key-switched or placed out of reach. We will set the controls up to suit the household.
Will I need planning permission in West Sussex?
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.
