How we approach flat rooflights in Kingston upon Thames
We handle flat rooflights across Greater London, including Kingston upon Thames. In short: fixed double or triple glazed rooflights for flat roofs and extensions. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Typical uses for flat rooflights include kitchen extensions, side returns and flat-roofed back rooms.
Kingston upon Thames sits about 3 km from Twickenham and 3 km from Richmond, and we cover the whole KT1 postcode district and the roads in between.
What you can choose
- Frame colours: anthracite, black, white or RAL
- Plastered or lined internal reveal
- Solar-control or self-cleaning outer pane
- Square, rectangular or long-format sizes
- Double or triple glazing
- Double or triple glazed with a warm-edge spacer
- Slim sightlines from inside — mostly glass, little frame
Before you order: points to check
- The roof membrane must be dressed up the upstand before the unit goes on
- Rooflights count toward glazing in an extension, which matters for Building Regulations energy and overheating rules
Planning and building rules for Kingston upon Thames
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. 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. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Our planning guide covers each nation in more detail.
Flat rooflights prices in Kingston upon Thames
These are typical supply-and-fit ranges. For an address in Kingston upon Thames, 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 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 |
From enquiry to finished job
- Tell us what you have. Send the KT1 postcode, a rough size and a couple of photos.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Related work in Kingston upon Thames
Common questions
Will it make the room too hot?
A big unglazed-to-sky area can add solar gain in summer. Solar-control glass, a blind, or pairing a fixed unit with an opening one keeps it comfortable.
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.
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 Kingston upon Thames?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Is the survey in Kingston upon Thames free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
