Flat rooflights in Whitstable: what is involved?
Flat rooflights in Whitstable means fixed double or triple glazed rooflights for flat roofs and extensions. We cover the CT5 district and the rest of Kent, with a survey before any price is fixed.
Larger gardens in much of the South East mean deeper rear extensions, and deeper rooms need light from above rather than only from the doors. Flat rooflights suit kitchen extensions, side returns and flat-roofed back rooms.
Neighbouring towns include Herne Bay (7 km) and Canterbury (10 km). We offer a survey date when we reply to your enquiry.
What you can choose
- Integral or fitted blinds
- Square, rectangular or long-format sizes
- Rain sensor if paired with an opening unit
- Solar-control or self-cleaning outer pane
- Plastered or lined internal reveal
- Double or triple glazed with a warm-edge spacer
- Even, top-down daylight across the whole room
What to check first
- Rooflights count toward glazing in an extension, which matters for Building Regulations energy and overheating rules
- The roof membrane must be dressed up the upstand before the unit goes on
Consents for flat rooflights in Whitstable
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.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. 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.
Read the planning permission guide before you commit to a design.
Flat rooflights prices in Whitstable
Prices below are shown including and excluding VAT. In Whitstable, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or triple glazed (1500 × 2500 mm and up) | £2,395 – £4,195 | £1,995 – £3,495 |
| Mid-size double glazed (1000 × 2000 mm) Typical | £1,675 – £2,395 | £1,395 – £1,995 |
| Small double glazed (up to 1000 × 1000 mm) | £1,195 – £1,795 | £995 – £1,495 |
What happens next
- Tell us what you have. Send the CT5 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits Whitstable, measures and checks structure and access.
- 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.
Neighbouring towns
Related work in Whitstable
Common questions
Can you fit into my existing flat roof?
Yes. We form a new opening, trim the joists, build and waterproof an upstand and make good the ceiling. A survey confirms the joist direction and roof build-up first.
Do flat rooflights leak?
A well-fitted flat rooflight should not leak. Leaks almost always come from the upstand or membrane detailing, not the glass unit, which is why the upstand height and the way the roof covering is dressed up and under the frame matter more than the brand.
How long does it take?
Fitting into a prepared upstand usually takes a day. Forming a new opening in an existing roof, including making good inside, is often two to three days.
Do I need to be at home for the survey in Whitstable?
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 Whitstable?
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.
