Builders in Harrow
Looking for builders in Harrow, Greater London? Here's everything you need to know about hiring a builder locally — typical prices, common jobs, and what to ask before you book.
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Common builders jobs in Harrow
FAQ — hiring a builder in Harrow
How much does a builder cost in Harrow?▾
Builders in Harrow typically work on day rates of £200–£400 per labourer. Full extension projects are quoted as a fixed price — usually £1,800–£3,000 per m² depending on spec.
Do I need planning permission?▾
Many extensions in Harrow fall under Permitted Development, but it depends on size, location and conservation status. A reputable builder will help you check before quoting.
Will the builder hire other tradespeople?▾
Most main builders manage the full project — bringing in plumbers, electricians, plasterers and roofers as needed. Confirm in writing whether their quote covers all sub-trades.
How long do extensions take in Harrow?▾
A single-storey rear extension typically takes 10–16 weeks from breaking ground to completion. Two-storey work and structural changes can take 4–6 months.