Flat Roofing in Barnet

Barnet at a glance

Postcode districts: N20, N11, N14, N12, EN4, N3, EN5, NW7 and 1 more
Council area: London Borough of Barnet
Building approval: London Borough of Barnet 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 Barnet?

Dormer roofs

Buyers' surveys in Barnet 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.

Commercial flat roofing

Safety planning matters on commercial sites in Barnet. Every job is planned under CDM, with a method statement, edge protection and covers over rooflights and fragile areas. If asbestos is found, a licensed specialist surveys and removes it before our work starts, so nobody is put at risk.

Warm roof insulation upgrades

Small commercial buildings in Barnet with large flat roofs can lose a lot of heat through them. Where the roof is being replaced, upgrading the insulation at the same time is required in most cases and helps reduce running costs for the occupier.

All flat roof services in Barnet:

How much does a flat roof cost in Barnet?

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
Upstand or flashing repair	£300–£780
Single garage (18 m²), GRP fibreglass	£2,150–£3,900
Dormer (8 m²), GRP, scaffold	£1,700–£3,200

What flat roofs are typical in and around Barnet?

In a town like Barnet flat roofs are mostly on mansion blocks and purpose-built flats with large flat roofs and shops with flat-roofed stores below flats above. Local weather shapes the specification. 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 Barnet?

Where approval is needed it goes to London Borough of Barnet 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 Barnet do we cover?

Flat roofing in Barnet: questions

Do you cover Barnet?

Yes, including postcode districts N20, N11, N14, N12, EN4, N3 and 3 more. Send your postcode with your enquiry and we'll arrange a survey.

Is a free survey available in Barnet?

Yes, for new and replacement roofs. A standalone condition survey or leak investigation report is a paid service.

How much is a new flat roof in Barnet?

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 Barnet 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 Barnet that's London Borough of Barnet building control, or a registered building control approver. We tell you at the survey and handle it.