Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.79 (14 reviews)

Find affordable Garston extension builders now

Extension builders rates in Garston range from £31/hour £235/day (COMPLETE CIVIL ENGINEERING) to £50/hour £317/day (Mandala Building Services). To see prices and availability now for your job click green button.

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

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

"Loft conversion" - WD19, job posted 07/05/26

"Looking for a loft conversion with a flat shed dormer (1 bed and bathroom) i have plans which have been submitted so looking for quotes" - WD24, job posted 26/12/25

"Loft conversion" - WD24, job posted 07/12/25

"Side return extension" - WD18, job posted 09/10/25

"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Existing Kitchen Width (internal): 2.01 metres ..." - WD18, job posted 07/08/25

"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Property Type: Mid-terrace house Location: WD18,..." - WATFORD, job posted 07/08/25

"Single storey extension" - WATFORD, job posted 26/05/25

"Hip to gable loft conversion" - WD24, job posted 28/01/25

"Loft conversion - (2 Rooms and a shower) Total Area - 40 square metres)" - WD19, job posted 29/12/24

"Loft conversion" - WD17, job posted 27/12/24

"Two storey extension" - WATFORD, job posted 16/12/24

"Side return extension" - WD17, job posted 05/03/24

Compare Garston extension builders rates

Compare Garston extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Watford	£43	£280
Extension Builders near Bushey	£43	£278
Extension Builders near Rickmansworth	£43	£282
Extension Builders near Borehamwood	£42	£271
Extension Builders near St Albans	£43	£272
Extension Builders near Dacorum	£42	£275
Extension Builders near Hemel Hempstead	£43	£276
Extension Builders near Harrow	£43	£270
Extension Builders near Hatfield	£42	£266
Extension Builders near High Barnet	£43	£272

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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