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WJ Builders
Mark Ward jones
WJ Builders is an established and experienced local extension builder in Barmouth. Please contact us for a free, no obligation quote and competitiv...
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 - £25,432
Garden office - £9,432
Granny annexe - £86,432
Build a flat roof extension - £21,432
Convert a Garage - £15,432
Hip to gable loft conversion - £41,432
Convert a bungalow loft - £28,432
Build a dormer loft conversion - £41,432
Build a swimming pool - £80,432
Build a Mansard loft conversion - £51,432
Concrete foundations - £5,682
Underpin a building - £16,932
Two storey extension - £87,148
Convert a basement - £31,110
Side return extension - £35,110
Loft conversion - £28,425
Garage - £17,932
Single storey extension - £43,640
Outbuilding - £9,432
Install an RSJ - £1,632
Build a kitchen extension - £41,432
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