Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.6 (15 reviews)

Find affordable Blackburn extension builders now

Extension builders rates in Blackburn range from £26/hour £154/day (Comprehensive Property Services) to £106/hour £848/day (Ridgesmart Roofing Ltd). To see prices and availability now for your job click green button.

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"Loft conversion" - BB1, job posted 26/05/26

"Garage conversion" - BB6, job posted 06/09/25

"Loft conversion" - BLACKBURN, job posted 24/07/25

"Loft conversion need a quote" - BLACKBURN, job posted 17/05/25

"Underpinning" - ACCRINGTON, job posted 06/04/25

"Two storey extension" - BLACKBURN, job posted 01/04/25

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

"Loft conversion for a storage" - BB1, job posted 15/03/25

"Side return extension" - BLACKBURN, job posted 26/12/24

"Side return extension approx 7 square metres" - BLACKBURN, job posted 16/07/24

"Side return extension" - BLACKBURN, job posted 21/04/24

"Single storey extension 3metres by 6" - BB2, job posted 10/02/24

"Side return extension" - BLACKBURN, job posted 01/01/24

"Side return extension double patio doors with steal beam to remove wall" - BB2, job posted 19/12/23

"Loft conversion" - BLACKBURN, job posted 10/12/23

Compare Blackburn extension builders rates

Compare Blackburn extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Blackburn	£33	£247
Extension Builders near Darwen	£34	£255
Extension Builders near Accrington	£33	£244
Extension Builders near Bamber Bridge	£30	£216
Extension Builders near Chorley	£30	£221
Extension Builders near Rawtenstall	£29	£213
Extension Builders near Preston	£30	£218
Extension Builders near Leyland	£30	£223
Extension Builders near Fulwood	£31	£217
Extension Builders near Burnley	£29	£219

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 - £25,944

Garden office - £9,944

Granny annexe - £86,944

Build a flat roof extension - £21,944

Convert a Garage - £15,944

Hip to gable loft conversion - £41,944

Convert a bungalow loft - £28,944

Build a dormer loft conversion - £41,944

Build a swimming pool - £80,944

Build a Mansard loft conversion - £51,944

Concrete foundations - £6,194

Underpin a building - £17,444

Two storey extension - £87,916

Convert a basement - £36,870

Side return extension - £40,870

Loft conversion - £33,225

Garage - £18,444

Single storey extension - £53,880

Outbuilding - £9,944

Install an RSJ - £2,144

Build a kitchen extension - £41,944

More extensions & conversions cost guides...

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