Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.67 (9 reviews)

Find affordable W5 extension builders now

Extension builders rates in W5 range from £37/hour £237/day (Elite Construction London Ltd) to £50/hour £313/day (Ferdas Design & Build Ltd). To see prices and availability now for your job click green button.

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"Loft conversion" - EALING, job posted 25/06/26

"UC beam install 2.5m only (calculations done, building control notification done, no pretty boxing etc.)" - TW8, job posted 09/03/26

"Hi there, I'm reaching out regarding a live opportunity at Heathrow Airport for the design, manufacture, and installation of a pre-fabricated pedestrian bridge next to the Longford Link Bridge. The contract is valued between £150k–£250k and runs until Jan 2027. CAS accreditation is required. If..." - W4, job posted 12/06/25

"Basement conversion" - WEST EALING, job posted 03/05/25

"Loft conversion" - EALING, job posted 29/04/25

"Kitchen extension" - WEST EALING, job posted 24/04/25

"Already have a 3m extension, I want to extend it to 6m. Main job will be the bricks, new ceiling, flooring, under floor heating." - W5, job posted 21/08/24

"Garage" - W3, job posted 18/06/24

"Outbuilding" - HANWELL, job posted 03/06/24

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Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local W5 Extension Builders or phone them directly - you’re in control!

Local Extension Builders in London Boroughs

Local Extension Builders in London Boroughs
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Extension Builders in Acton
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Extension Builders in Osterley

Job estimates from extension builders near you

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Build a timber frame extension - £26,192

Garden office - £10,192

Granny annexe - £87,192

Build a flat roof extension - £22,192

Convert a Garage - £16,192

Hip to gable loft conversion - £42,192

Convert a bungalow loft - £29,192

Build a dormer loft conversion - £42,192

Build a swimming pool - £81,192

Build a Mansard loft conversion - £52,192

Concrete foundations - £6,442

Underpin a building - £17,692

Two storey extension - £88,288

Convert a basement - £39,660

Side return extension - £43,660

Loft conversion - £35,550

Garage - £18,692

Single storey extension - £58,840

Outbuilding - £10,192

Install an RSJ - £2,392

Build a kitchen extension - £42,192

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