Flat rooflights for Southampton: the essentials
We handle flat rooflights across Hampshire, including Southampton. 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.
Period cottages and conservation-area streets are common in the South East, so slim conservation rooflights are often the right choice. Typical uses for flat rooflights include landings, bathrooms and rear extensions with flat roofs.
We cover all of Southampton and the SO14 district, and nearby Hythe and Totton.
Specification options
- Solar-control or self-cleaning outer pane
- Frame colours: anthracite, black, white or RAL
- Rain sensor if paired with an opening unit
- Integral or fitted blinds
- Insulated kerb or timber upstand built to suit
- Pairs with an opening unit where you also need ventilation
- Even, top-down daylight across the whole room
What to check first
- Needs a properly formed upstand — usually at least 150 mm above the finished roof surface (check the manufacturer's figure)
- The roof membrane must be dressed up the upstand before the unit goes on
Planning, building control and Southampton
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. 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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. 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 Southampton
These are typical supply-and-fit ranges. For an address in Southampton, 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 |
What happens next
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Southampton address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- 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.
Flat rooflights near Southampton
Other services in Southampton
Flat rooflights in Southampton: questions
Double or triple glazing?
Double glazing suits most domestic jobs. Triple glazing improves thermal performance and cuts noise from rain, which is worth it over bedrooms or where the energy calculation is tight.
Can a flat rooflight be walked on?
Not unless it is designed as a walk-on unit with structural laminated glass. A standard flat rooflight is for light only — if the roof is used as a terrace, choose a walk-on rooflight instead.
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 Southampton?
Yes. We survey and fit flat rooflights in Southampton and across Hampshire. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Southampton?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
