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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insulation for extensions

Avoid Weeks of Delay: Fuseboard Upgrades for Extensions in England

Plan fuseboard upgrades into your extension in England to secure Part P and BS 7671 sign off, avoid DNO delays and costly rework.

The Extension Works 26 September 2026
Avoid Weeks of Delay: Fuseboard Upgrades for Extensions in England