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

Find affordable Castletown extension builders now

Extension builders rates in Castletown range from £16/hour £130/day (OCC Construction) to £42/hour £624/day (John Barrett Joiner Builder). To see prices and availability now for your job click green button.

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"Domer building to house" - SR4, job posted 02/07/26

"Loft conversion" - SR4, job posted 02/07/26

"Two storey extension" - SR5, job posted 15/06/26

"Loft conversion" - SR6, job posted 25/01/26

"Single storey extension" - NE34, job posted 08/01/26

"Build a two storey extension" - SR2, job posted 27/11/25

"Loft conversion" - SUNDERLAND, job posted 07/10/25

"Build a dormer loft conversion" - SR3, job posted 02/09/25

"Loft conversion" - SUNDERLAND, job posted 23/08/25

"Loft conversion" - SUNDERLAND, job posted 30/07/25

"Extend above garage on semi detached house" - SUNDERLAND, job posted 24/07/25

"RSJ installation" - SUNDERLAND, job posted 16/07/25

"Bungalow loft conversion" - SUNDERLAND, job posted 10/07/25

"Loft conversion" - SOUTH TYNESIDE, job posted 04/06/25

"Loft conversion" - SUNDERLAND, job posted 10/05/25

"Two storey extension" - SUNDERLAND, job posted 30/03/25

"Single storey extension" - SUNDERLAND, job posted 12/03/25

Compare Castletown extension builders rates

Compare Castletown extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near South Tyneside	£34	£261
Extension Builders near Sunderland	£33	£251
Extension Builders near Jarrow	£34	£262
Extension Builders near Washington	£33	£254
Extension Builders near South Shields	£36	£257
Extension Builders near Hebburn	£34	£246
Extension Builders near Wallsend	£34	£245
Extension Builders near Tynemouth	£36	£257
Extension Builders near Seaham	£35	£235
Extension Builders near North Tyneside	£35	£253

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 - £26,112

Garden office - £10,112

Granny annexe - £87,112

Build a flat roof extension - £22,112

Convert a Garage - £16,112

Hip to gable loft conversion - £42,112

Convert a bungalow loft - £29,112

Build a dormer loft conversion - £42,112

Build a swimming pool - £81,112

Build a Mansard loft conversion - £52,112

Concrete foundations - £6,362

Underpin a building - £17,612

Two storey extension - £88,168

Convert a basement - £38,760

Side return extension - £42,760

Loft conversion - £34,800

Garage - £18,612

Single storey extension - £57,240

Outbuilding - £10,112

Install an RSJ - £2,312

Build a kitchen extension - £42,112

More extensions & conversions cost guides...

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