The Extension Works
UK only: we design and build extensions in London & the South East of England (Surrey, Hampshire & Berkshire) — we can’t quote for projects outside the UK.
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benefits of integrated design

One Contract for UK Homeowners: Design and Build Benefits

See how design and build gives UK homeowners one firm, earlier pricing, faster sequencing, and checks for bespoke finishes and Building Regulations.

The Extension Works 16 October 2026
One Contract for UK Homeowners: Design and Build Benefits