Cost to Build a Single Storey Extension in W1J

Build a single storey extension in W1J from £19,160

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Single storey extension cost in W1J

Extension builder estimates (based on hourly rates) to build a single storey extension in W1J

Estimates for single storey extension near W1J

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Borough in London
Single Storey Extension in Piccadilly
Single Storey Extension in Savile Row
Single Storey Extension in Mayfair
Single Storey Extension in St James's
Single Storey Extension in Regent Street
Single Storey Extension in Oxford Street
Single Storey Extension in City of Westminster
Single Storey Extension in Soho
Single Storey Extension in Whitehall
Single Storey Extension in China Town

Estimates for common extension builder jobs in W1J;

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 - £17,534

Two storey extension

Two storey extension - £88,050

Build a timber frame extension

Build a timber frame extension - £26,034

Build a swimming pool

Build a swimming pool - £81,034

Single storey extension

Single storey extension - £55,672

Side return extension

Side return extension - £41,878

Install an RSJ

Install an RSJ - £2,234

Outbuilding

Outbuilding - £10,034

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,034

Loft conversion

Loft conversion - £34,065

Build a kitchen extension

Build a kitchen extension - £42,034

Hip to gable loft conversion

Hip to gable loft conversion - £42,034

Granny annexe

Granny annexe - £87,034

Garden office

Garden office - £10,034

Convert a Garage

Convert a Garage - £16,034

Garage

Garage - £18,534

Build a flat roof extension

Build a flat roof extension - £22,034

Build a dormer loft conversion

Build a dormer loft conversion - £42,034

Concrete foundations

Concrete foundations - £6,284

Convert a bungalow loft

Convert a bungalow loft - £29,034

Convert a basement

Convert a basement - £37,878

More extensions & conversions cost guides...