Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.61 (9 reviews)

Find affordable Hounslow extension builders now

Extension builders rates in Hounslow range from £36/hour £237/day (J&M HOME IMPROVEMRNTS LTD) to £49/hour £305/day (JTB Developments). To see prices and availability now for your job click green button.

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"Porch construction on the side entrance of the house" - TW3, job posted 21/08/26

"Basement conversion" - TW2, job posted 04/05/26

"Loft conversion" - TWICKENHAM, job posted 01/07/25

"Granny annexe" - TWICKENHAM, job posted 30/06/25

"Want to build a outbuilding 6meters by 4 meters with brick fibre roof 1 double glazing door 1 glazing window will need to do electrics to the outhouse fit in lighting and plug sockets" - HESTON, job posted 08/05/25

"Underpinning a house" - TW7, job posted 06/05/25

"Loft conversion" - TWICKENHAM, job posted 03/03/25

"Concrete foundation" - HOUNSLOW, job posted 17/01/25

"Loft conversion" - TWICKENHAM, job posted 03/06/24

"Very good at what they do and cheaper than bigger companies. they dont cut corners and design is extra ordinary. they gave me 40% off bathroom and Kitchen products and sanitary ware and tiles. had 5 bathrooms and Kitchen and utility room." - HAMMERSMITH,reviewed 17/12/17, DAVID MASH

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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

More extensions & conversions cost guides...

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