Flat Roofing in Westminster

Westminster at a glance

Postcode districts: W1K, W1C, W1H, W1U, W1M, W1G, W1, W1J and 20 more
Council area: City of Westminster
Building approval: City of Westminster 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 Westminster?

Green and sedum roofs

In a place like Westminster, many people look out over a flat extension or garage roof from upstairs. Grey felt or rubber isn't much of a view, and a sedum roof turns it into something green that changes colour through the seasons and flowers in summer.

Emergency leak repairs

Leaves and debris build up in outlets and gutters on flat roofs around Westminster, especially under trees. A blocked outlet can turn a normal rainstorm into a flood over the upstands. Clearing it is often part of the emergency visit, and the permanent fix looks at why it blocked.

EPDM rubber roofing

EPDM makes sense for a property in Westminster when the roof is a straightforward shape, such as a garage or rear extension, and nobody needs to walk on it. A single sheet leaves few joins to fail, and because it is cold-applied there is no naked flame near timber fascias or a lived-in home.

All flat roof services in Westminster:

How much does a flat roof cost in Westminster?

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
Condition survey and leak investigation	£180–£360
Dormer (8 m²), GRP, scaffold	£1,700–£3,200
Single garage (18 m²), torch-on felt	£1,800–£3,150
Extension (20 m²), EPDM, insulation + 1 rooflight upstand	£3,600–£6,300
Extension (20 m²), felt, new deck + insulation	£3,250–£5,600

What flat roofs are typical in and around Westminster?

In a town like Westminster flat roofs are mostly on Victorian and Edwardian terraces with flat-roofed back additions and mansion blocks and purpose-built flats with large flat roofs. The climate is part of the brief. 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 Westminster?

Where approval is needed it goes to City of Westminster 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 Westminster do we cover?

Flat roofing in Westminster: questions

Do you cover Westminster?

Yes, including postcode districts W1K, W1C, W1H, W1U, W1M, W1G and 22 more. Send your postcode with your enquiry and we'll arrange a survey.

Can you repair a leaking flat roof in Westminster?

Yes. We trace where the water is actually getting in first, because the leak inside is rarely under the defect outside, then repair with materials compatible with your roof.

What's the best flat roof system for a house in Westminster?

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 Westminster?

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.