Build a single storey extension in Gwynedd from £40,120

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Single storey extension cost in Gwynedd

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WJ Builders

From £43,640

Location

Pwllheli, LL53

WJ Builders is an established and experienced local extension builder in Gwynedd. Please contact us for a free, no obligation quote and competitive...

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Building & Flat Roofing Contractors

From £40,120

Location

Caernarfon, LL54

Building & Flat Roofing Contractors is a trusted extension builder serving customers in Gwynedd and the surrounding area. Contact us to today to ge...

Extension builder estimates (based on hourly rates) to build a single storey extension in Gwynedd

Estimates for single storey extension near Gwynedd

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Location in UKHourly RateDaily Rate
Single Storey Extension near Conwy£28£211
Single Storey Extension near Conway£28£211
Single Storey Extension near Llandudno£28£211
Single Storey Extension near Colwyn Bay£28£211
Single Storey Extension near Rhyl£28£209

Estimates for common extension builder jobs in Gwynedd;

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.

Underpin a building

Underpin a building - £16,844

Two storey extension

Two storey extension - £87,016

Build a timber frame extension

Build a timber frame extension - £25,344

Build a swimming pool

Build a swimming pool - £80,344

Single storey extension

Single storey extension - £41,880

Side return extension

Side return extension - £34,120

Install an RSJ

Install an RSJ - £1,544

Outbuilding

Outbuilding - £9,344

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,344

Loft conversion

Loft conversion - £27,600

Build a kitchen extension

Build a kitchen extension - £41,344

Hip to gable loft conversion

Hip to gable loft conversion - £41,344

Granny annexe

Granny annexe - £86,344

Garden office

Garden office - £9,344

Convert a Garage

Convert a Garage - £15,344

Garage

Garage - £17,844

Build a flat roof extension

Build a flat roof extension - £21,344

Build a dormer loft conversion

Build a dormer loft conversion - £41,344

Concrete foundations

Concrete foundations - £5,594

Convert a bungalow loft

Convert a bungalow loft - £28,344

Convert a basement

Convert a basement - £30,120

More extensions & conversions cost guides...