Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.6 (20 reviews)

Find affordable London extension builders now

Extension builders rates in London range from £30/hour £238/day (Lp Townsend Brickwork) to £112/hour £448/day (Imq). To see prices and availability now for your job click green button.

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"Job 1 New drain line , to be connected to mains. Job 2 Ground work to be done , to construct 1st floor, and 2nd floor of the building. Job 3 new roof to be done for new building, 1st and 2nd floor. Job 4 plumbing work and adjusted with old plumbing. Work must be done according to plan and..." - RM5, job posted 28/10/26

"Granny annexe" - KINGSTON UPON THAMES, job posted 21/10/26

"Loft conversion(dormer) with bedroom and en-suite bathroom on a bungalow and a rear single storey 5x4 flat roof extension" - AL2, job posted 09/10/26

"Single storey extension" - N17, job posted 28/09/26

"Single storey extension" - SL9, job posted 27/09/26

"Two storey extension" - NW6, job posted 27/09/26

"Change mascerator as its overflowing, its behind a cabinet that would need to be o pened up" - SE18, job posted 21/09/26

"Build a dormer loft conversion" - BR3, job posted 19/09/26

"Two storey extension" - RM15, job posted 17/09/26

"Convert a Garage" - SE13, job posted 14/09/26

"Loft conversion" - WD7, job posted 13/09/26

"Single storey extension" - AL4, job posted 09/09/26

"Dormer loft extension" - RM13, job posted 08/09/26

"Loft conversion" - RM13, job posted 08/09/26

"Speculative quote ahead of a prospective purchase" - E3, job posted 31/08/26

"New loft and side extension roof changing" - UB2, job posted 30/08/26

"Loft conversion" - WD7, job posted 30/08/26

"New loft and side extension roof changing" - SOUTHALL, job posted 30/08/26

"Loft conversion" - RM14, job posted 26/08/26

"Underpin a building" - N10, job posted 26/08/26

Quickly find an Extension Builder in London

Use these steps to find Extension Builders in London for FREE!

Post your job: Click "Get quotes" and briefly describe your job.
Enter your details: We’ll match you with Extension Builders in London. We’ll notify you via text or email when an Extension Builder is available to quote.
Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local London Extension Builders or phone them directly - you’re in control!

Compare London extension builders rates

Compare London extension builders rates
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Belgravia	£44	£276
Extension Builders near Lambeth	£44	£275
Extension Builders near Camden Town	£44	£277
Extension Builders near Chelsea	£44	£276
Extension Builders near Islington	£45	£276
Extension Builders near Camberwell	£44	£276
Extension Builders near Kensington	£44	£277
Extension Builders near Bethnal Green	£45	£276
Extension Builders near Hackney	£45	£278
Extension Builders near Fulham	£44	£278
Extension Builders near Hammersmith	£44	£279
Extension Builders near Earlsfield	£44	£277
Extension Builders near Greenwich	£44	£268
Extension Builders near Muswell Hill	£44	£273
Extension Builders near Lewisham	£43	£268
Extension Builders near Wimbledon	£43	£273
Extension Builders near Plaistow	£42	£268
Extension Builders near Brent Cross	£43	£273
Extension Builders near Walthamstow	£45	£278
Extension Builders near Merton	£43	£272
Extension Builders near Ealing	£44	£275
Extension Builders near Redbridge	£41	£265
Extension Builders near Bromley	£43	£268
Extension Builders near Croydon	£42	£267
Extension Builders near Barking	£43	£261
Extension Builders near Kingston Upon Thames	£43	£271
Extension Builders near Sutton	£43	£274
Extension Builders near High Barnet	£43	£272
Extension Builders near Harrow	£43	£270
Extension Builders near Hounslow	£43	£272
Extension Builders near Richmond Upon Thames	£43	£274
Extension Builders near Bexley	£42	£265
Extension Builders near Hillingdon	£43	£276
Extension Builders near Romford	£45	£274

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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