Flat Roofing in Kensington and Chelsea

Kensington and Chelsea at a glance

Postcode districts: W8, SW5, SW7, W11, SW10, SW3, W10
Council area: Royal Borough of Kensington and Chelsea
Building approval: Royal Borough of Kensington and Chelsea building control, or a registered building control approver
Guide price region: London (+20% on West Midlands rates)

What flat roof work do we do in Kensington and Chelsea?

Dormer roofs

Buyers' surveys in Kensington and Chelsea often flag dormer roofs, because they are hard to see from the ground and easy to neglect. A recent replacement, with building control sign-off where needed and written guarantees, answers that question before it becomes a problem in the sale.

Flat roof repairs

Flat roofs in Kensington and Chelsea face the same enemies as anywhere else: rain driven against walls, leaves blocking outlets, sun drying out older felt and frost opening small cracks. People tend to notice when a stain appears on a ceiling after a storm, or when water is still sitting on the roof days after rain.

Green and sedum roofs

Small commercial buildings and blocks in Kensington and Chelsea with a flat roof sometimes add an extensive green roof as part of a refurbishment. The structural check and safe access for maintenance matter even more on these larger roofs, which may need edge protection or fall-arrest points for each visit.

All flat roof services in Kensington and Chelsea:

How much does a flat roof cost in Kensington and Chelsea?

Guide prices at London rates including VAT. New and replacement roofs get a fixed price after a free survey; repair prices are confirmed once we've found the problem.

Job	Guide price inc VAT
Extension (20 m²), EPDM, insulation + 1 rooflight upstand	£3,600–£6,300
Emergency temporary weatherproofing visit	£220–£540
Single garage (18 m²), liquid-applied	£2,450–£3,900
Single garage (18 m²), EPDM rubber	£1,900–£3,350
Extension (20 m²), EPDM, new deck + insulation	£3,350–£5,850

What flat roofs are typical in and around Kensington and Chelsea?

In a town like Kensington and Chelsea flat roofs are mostly on shops with flat-roofed stores below flats above and mansard and dormer loft conversions. Rain and wind decide how a flat roof is detailed. The Thames basin is one of the drier parts of Britain at roughly 730 mm of rain a year, but summer heat is the bigger test here: dark membranes on south-facing roofs swing a long way in temperature. Approximate 1991–2020 regional averages based on Met Office data.

Who approves flat roof work in Kensington and Chelsea?

Where approval is needed it goes to Royal Borough of Kensington and Chelsea building control, or a registered building control approver. Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. How the rules work.

Which places near Kensington and Chelsea do we cover?

Flat roofing in Kensington and Chelsea: questions

Do you cover Kensington and Chelsea?

Yes, including postcode districts W8, SW5, SW7, W11, SW10, SW3 and 1 more. Send your postcode with your enquiry and we'll arrange a survey.

What's the best flat roof system for a house in Kensington and Chelsea?

For most garages and extensions it's EPDM or GRP; torch-on felt is the budget option and liquid suits detailed or overlay jobs. We recommend one at the survey.

How much is a new flat roof in Kensington and Chelsea?

A typical 18 m² EPDM garage roof is £1,900–£3,350 and a 20 m² insulated EPDM extension roof is £3,350–£5,850, at London guide rates including VAT.

Do flat roofs in Kensington and Chelsea need building control approval?

Often. Replacing more than half of a roof over a heated room usually means insulating it to current standards and notifying building control, and structural changes need approval too. In Kensington and Chelsea that's Royal Borough of Kensington and Chelsea building control, or a registered building control approver. We tell you at the survey and handle it.