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Builders in HA1, Harrow

Planning an extension, loft conversion or renovation in Harrow (HA1)? Describe the project and up to 3 local builders will get in touch to quote.

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📍 Builders covering HA1

HA1 covers Harrow in the London Borough of Harrow. Enter your full postcode above and we'll send your job to builders who work in HA1 and nearby.

💷 Typical builder prices in HA1 (Harrow)

Single-storey rear extension£2,800 to £4,000 per m²
Dormer loft conversion£55,000 to £85,000
Kitchen refit (labour and fitting)£8,000 to £25,000
General builder day rate£250 to £350
Typical London prices in 2026. A guide only; your quotes will depend on the job.

💬 Questions about hiring a builder in Harrow

Do I need planning permission in Harrow?

Many rear extensions and loft conversions fall under permitted development, so they don't need full planning permission. Rules are stricter in conservation areas and for flats. Check with the council or ask builders when they quote.

How many quotes should I get?

Three is a good number for building work. It gives you a sense of the fair price and lets you compare how each builder plans the job, not just the total.

What should a builder's quote include?

A written breakdown of labour and materials, a start date and timeline, a payment schedule tied to stages of work, and who is responsible for skips, waste and making good.

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