How we approach flat rooflights in Mitcham
Flat rooflights in Mitcham means fixed double or triple glazed rooflights for flat roofs and extensions. We cover the CR4 district and the rest of Greater London, with a survey before any price is fixed.
Victorian and Edwardian terraces with narrow side returns are typical of much of London, and a glass roof or long flat rooflight is the usual way to keep the back rooms bright once the return is built over. Flat rooflights suit landings, bathrooms and rear extensions with flat roofs.
Mitcham is around 12 km from central London, and we survey and fit throughout that part of Greater London, including the CR4 district.
Options we can specify in Mitcham
- Double or triple glazing
- Solar-control or self-cleaning outer pane
- Rain sensor if paired with an opening unit
- Plastered or lined internal reveal
- Frame colours: anthracite, black, white or RAL
- Double or triple glazed with a warm-edge spacer
- Even, top-down daylight across the whole room
What to check first
- New openings in an existing roof need a structural check on joists
- The roof membrane must be dressed up the upstand before the unit goes on
Consents for flat rooflights in Mitcham
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. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
Flat rooflights prices in Mitcham
Prices below are shown including and excluding VAT. In Mitcham, 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 |
How the job runs
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
Related work in Mitcham
Questions about flat rooflights in Mitcham
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.
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.
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 you fit flat rooflights in Mitcham?
Yes. We survey and fit flat rooflights in Mitcham and across Greater London. Send your postcode and we will offer a survey date when we reply.
How do I book a survey in Mitcham?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
