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New roof (new build / extension) in London

New roof construction on an extension or new build — full covering, underlayment, structure coordination.

Greater London · updated 2026-04-11 · 1 local roofer in directory

Typical cost in London

£110–£268/m²

Mid-market: £171/m². Local factor 1.22× national baseline (higher labour/access costs in this region). Ranges are indicative; real quotes vary with scope, access, and materials.

See the full UK roofing cost guide for the methodology and the factors that move a quote up or down.

What the job involves

A new roof on an extension or new build is specified as part of the overall project. The roofer’s scope usually starts once the rafters and boarding are in place: laying the underlayment, fitting battens, and installing the chosen covering.

Building Regulations Part L and Part C apply to all new construction. The covering has to hit specific U-values, the underlayment has to resist the passage of moisture, and the detailing at abutments and eaves has to handle wind uplift — all covered in BS 5534.

London — local context

Traditional material: Welsh slate on Georgian and Victorian terraces, clay tile in the outer boroughs.

London has the highest concentration of listed buildings and conservation areas in England, which commonly restrict re-roofs to like-for-like materials; inner boroughs also add parking suspension fees that push scaffold-assisted jobs above the baseline.

What changes the price

  • Covering material and underlayment specification.
  • Coordination with the main contractor and other trades.
  • Complexity — dormers, rooflights, solar provision.
  • Height, pitch, and scaffolding plan.

Timeline: Roofer’s portion of a new-build extension is usually 3–8 days depending on complexity.

Roofers serving London

Listings are drawn from public Companies House records and enriched where verified. See our methodology for how we build and rank this directory.

  • London Elite Roofers

    New roof · Re-roof · Flat roofing · Commercial

    Verified listing

Directory being expanded — if you're a London roofer and want to be listed, add your business.

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Common questions

Who is responsible for Part L compliance — me or the roofer?

For a new build or extension, the person commissioning the work is the “relevant person” under Building Regulations. In practice the main contractor (or for a roof-only job, the roofer) takes responsibility for issuing the compliance certificate, often via CompetentRoofer self-certification.

Can I use a different covering from the rest of the house?

In most situations yes, but in conservation areas and on listed buildings the planning authority may require the extension roof to match the main house.

What does new roof (new build / extension) typically cost in London?

A typical new roof (new build / extension) job in London falls in the £110–£268/m² range, with the middle of the market around £171/m². London’s labour and access factor (1.22× the national baseline) means prices run slightly above the UK average. Actual quotes vary with access, materials, and specifics of the job.

Are there any London-specific things that affect price?

London has the highest concentration of listed buildings and conservation areas in England, which commonly restrict re-roofs to like-for-like materials; inner boroughs also add parking suspension fees that push scaffold-assisted jobs above the baseline.

How many roofers serve London through this site?

1 company in our directory currently serve London. More are added regularly as we verify new listings from Companies House and trade body records.

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