Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.54 (12 reviews)

Find affordable Hertfordshire extension builders now

Extension builders rates in Hertfordshire range from £25/hour £194/day (EB Construction & Building Ltd) 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(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

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

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

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

"Extend my behinddddddddddddddddddddddd" - AL4, job posted 09/01/26

"Kitchen extension" - HARPENDEN, job posted 04/05/25

"Loft conversion" - ST ALBANS, job posted 04/03/25

"Loft conversion" - ST ALBANS, job posted 15/09/24

"Loft conversion" - AL4, job posted 24/06/24

"Side return extension" - ST ALBANS, job posted 17/05/24

"Single storey extension" - ST ALBANS, job posted 07/04/24

"Side return extension" - ST ALBANS, job posted 06/11/23

Compare Hertfordshire extension builders rates

Compare Hertfordshire extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near St Albans	£43	£272
Extension Builders near Hatfield	£42	£266
Extension Builders near Harpenden	£45	£282
Extension Builders near Borehamwood	£42	£271
Extension Builders near Welwyn Garden City	£42	£269
Extension Builders near Hemel Hempstead	£43	£276
Extension Builders near Potters Bar	£43	£273
Extension Builders near Bushey	£43	£278
Extension Builders near Dacorum	£42	£275
Extension Builders near Watford	£43	£280

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 - £26,184

Garden office - £10,184

Granny annexe - £87,184

Build a flat roof extension - £22,184

Convert a Garage - £16,184

Hip to gable loft conversion - £42,184

Convert a bungalow loft - £29,184

Build a dormer loft conversion - £42,184

Build a swimming pool - £81,184

Build a Mansard loft conversion - £52,184

Concrete foundations - £6,434

Underpin a building - £17,684

Two storey extension - £88,276

Convert a basement - £39,570

Side return extension - £43,570

Loft conversion - £35,475

Garage - £18,684

Single storey extension - £58,680

Outbuilding - £10,184

Install an RSJ - £2,384

Build a kitchen extension - £42,184

More extensions & conversions cost guides...

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