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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threshold drainage channel

Level threshold patio doors: accessibility meets drainage

Explore level threshold patio doors for seamless indoor-outdoor access. Enjoy easy movement, stunning views, and effective drainage solutions.

The Extension Works 19 August 2026
Level threshold patio doors: accessibility meets drainage