House extensions in HA1, Harrow
House extensions in Harrow (HA1): more kitchen, more bedroom, more you. Describe the project and up to 3 local builders will get in touch to quote.
✅ What your house extensions covers in HA1 (Harrow)
- Plans and drawings, or working to yours
- Building regulations and party wall help
- Foundations, walls, roof and windows
- Plastering, electrics and plumbing coordinated
- A clear timeline and staged payments
💷 Typical house extensions prices in HA1 (Harrow)
| Single-storey rear extension | £2,800 to £4,000 per m² |
| Double-storey extension | £2,200 to £3,500 per m² |
| Side return extension | £3,000 to £4,200 per m² |
💬 Questions about house extensions in Harrow
Do I need planning permission in Harrow?
Many rear extensions 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 long does an extension take?
A single-storey extension is often 3 to 5 months from first dig to final snag, plus time for plans and approvals. Your builder will give you a timeline.
What should the quote include?
A written breakdown of labour and materials, a start date, a payment schedule tied to stages of work, and who handles skips and waste.
📍 House extensions 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, like HA2 (South Harrow), HA3 (Kenton, Wealdstone) and HA5 (Pinner).