Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.7 (20 reviews)

Find affordable City Of Westminster extension builders now

Extension builders rates in City Of Westminster range from £38/hour £247/day (Buci builders ltd) to £86/hour £480/day (Bspec Ltd). To see prices and availability now for your job click green button.

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

"Underpin a building" - N7, job posted 23/08/26

"Single storey extension" - SW18, job posted 23/03/26

"Concrete foundation" - W1T, job posted 16/10/25

"A 8 meter by 1 story high wall to removed clear way and rebuild" - SW4, job posted 18/08/25

"Side return extension" - NW10, job posted 14/08/25

"We have a long list of customers that need only a builder that can fit conservatory. We don’t need supplier. Please contact us if you can help. Thanks" - NW10, job posted 10/07/25

"To divide a room" - SW2, job posted 08/07/25

"Fully extend with side return and renovate dated Victorian house with loft added. Size is 100m2 currently to 160m2 on completion." - E5, job posted 19/06/25

"Need an extension builder" - N4, job posted 18/05/25

"Basement conversion" - LAMBETH, job posted 02/05/25

"Basement conversion" - E5, job posted 27/04/25

"Loft conversion" - W12, job posted 21/04/25

"Loft conversion" - W12, job posted 20/04/25

"RSJ re-installation" - N16, job posted 10/04/25

"Extension to lower ground area." - SW9, job posted 28/03/25

"Flat roof extension" - E5, job posted 18/03/25

"Single storey extension" - BALHAM, job posted 26/02/25

"Two storey extension" - HERNE HILL, job posted 12/01/25

"Loft conversion" - W12, job posted 23/10/24

Compare City Of Westminster extension builders rates

Compare City Of Westminster extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near London	£43	£273
Extension Builders near Camden Town	£44	£277
Extension Builders near Belgravia	£44	£276
Extension Builders near Chelsea	£44	£276
Extension Builders near Lambeth	£44	£275
Extension Builders near Kensington	£44	£277
Extension Builders near Islington	£45	£276
Extension Builders near Fulham	£44	£278
Extension Builders near Camberwell	£44	£276
Extension Builders near Bethnal Green	£45	£276

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 - £26,208

Garden office - £10,208

Granny annexe - £87,208

Build a flat roof extension - £22,208

Convert a Garage - £16,208

Hip to gable loft conversion - £42,208

Convert a bungalow loft - £29,208

Build a dormer loft conversion - £42,208

Build a swimming pool - £81,208

Build a Mansard loft conversion - £52,208

Concrete foundations - £6,458

Underpin a building - £17,708

Two storey extension - £88,312

Convert a basement - £39,840

Side return extension - £43,840

Loft conversion - £35,700

Garage - £18,708

Single storey extension - £59,160

Outbuilding - £10,208

Install an RSJ - £2,408

Build a kitchen extension - £42,208

More extensions & conversions cost guides...

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