Build a single storey extension in Castle Cary from £45,560

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Single storey extension cost in Castle Cary

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STONEWALK CONSTRUCTION LTD

From £57,560

(rates verified 15/09/26)

Location

Ilminster, TA19

STONEWALK CONSTRUCTION LTD is an established and experienced local extension builder in Castle Cary. Please contact us for a free, no obligation qu...

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ABS Abbott Preservation

From £54,040

(last active 19/09/26)

Location

Langport, TA10

Experienced extension builder ready to quote for your work. ABS Abbott Preservation is the best extension builder in Castle Cary. No obligation fre...

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C O JOYCE LIMITED

From £45,560

(last active 15/09/26)

Location

Street, BA16

Reliable cheap clean over 50 years experience 

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Firestone Surfacing Ltd

From £52,120

(last active 15/09/26)

Location

Yeovil, BA21

Firestone Surfacing Ltd is a trusted extension builder serving customers in Castle Cary and the surrounding area. Contact us to today to get a comp...

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CLARKE BUILDING:ROOFING

From £57,560

(last active 31/08/26)

Location

Cheddar, BS27

Colin Clarke building:roofing has been successfully in business for 30 years. A vast amount of skills and knowledge has been gained and used to cre...

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Jeremy Blythe

From £50,360

(last active 31/08/26)

Location

Chew Valley, BS40

Trusted and professional extension builder in Castle Cary. Experienced in all extension buildering work and keeping within budget and on quote. Jer...

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K STOBBS BUILDING CONTRACTOR

From £54,520

(last active 26/08/26)

Location

Radstock, BA3

K STOBBS BUILDING CONTRACTOR is an established extension buildering business in Castle Cary. We come highly recommended and provide competitive quo...

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Adrian Fowler Property Maintenance & General Building

From £54,840

(last active 24/08/26)

Location

Street, BA16

Adrian Fowler Property Maintenance & General Building is a trusted extension builder serving customers in Castle Cary and the surrounding area. Con...

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MICHAEL PARKER BUILDING CONTR.

From £58,680

(last active 24/08/26)

Location

Wedmore, BS28

Trusted and professional extension builder in Castle Cary. Experienced in all extension buildering work and keeping within budget and on quote. MIC...

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Bryan Loveday Services Limited

From £52,280

(last active 02/06/26)

Location

War, BA12

Relax... you have found a reliable extension builder in Castle Cary. Bryan Loveday Services Limited is a friendly and reliable company based in Cas...

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

Estimates for single storey extension near Castle Cary

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Location in UKHourly RateDaily Rate
Single Storey Extension near South Somerset£62£270
Single Storey Extension near Yeovil£34£294
Single Storey Extension near Frome£33£263
Single Storey Extension near Bath£32£249
Single Storey Extension near Bridgwater£30£236
Single Storey Extension near Trowbridge£34£266
Single Storey Extension near Keynsham£33£251
Single Storey Extension near North Somerset£32£245
Single Storey Extension near Bristol£33£255
Single Storey Extension near Kingswood£34£257

Estimates for common extension builder jobs in Castle Cary;

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 - £17,438

Two storey extension

Two storey extension - £87,906

Build a timber frame extension

Build a timber frame extension - £25,938

Build a swimming pool

Build a swimming pool - £80,938

Single storey extension

Single storey extension - £53,752

Side return extension

Side return extension - £40,798

Install an RSJ

Install an RSJ - £2,138

Outbuilding

Outbuilding - £9,938

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,938

Loft conversion

Loft conversion - £33,165

Build a kitchen extension

Build a kitchen extension - £41,938

Hip to gable loft conversion

Hip to gable loft conversion - £41,938

Granny annexe

Granny annexe - £86,938

Garden office

Garden office - £9,938

Convert a Garage

Convert a Garage - £15,938

Garage

Garage - £18,438

Build a flat roof extension

Build a flat roof extension - £21,938

Build a dormer loft conversion

Build a dormer loft conversion - £41,938

Concrete foundations

Concrete foundations - £6,188

Convert a bungalow loft

Convert a bungalow loft - £28,938

Convert a basement

Convert a basement - £36,798

More extensions & conversions cost guides...