Cost to Build a Single Storey Extension in BR3

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Build a single storey extension in BR3 from £51,480

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Single storey extension cost in BR3

Extension builder estimates (based on hourly rates) to build a single storey extension in BR3

Estimates for single storey extension near BR3

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Borough in London
Single Storey Extension in Beckenham
Single Storey Extension in Penge
Single Storey Extension in Sydenham
Single Storey Extension in South Norwood
Single Storey Extension in West Wickam
Single Storey Extension in Bromley
Single Storey Extension in Keston
Single Storey Extension in Catford
Single Storey Extension in Crystal Palace
Single Storey Extension in Forest Hill

Estimates for common extension builder jobs in BR3;

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 - £17,640

Two storey extension

Two storey extension - £88,210

Build a timber frame extension

Build a timber frame extension - £26,140

Build a swimming pool

Build a swimming pool - £81,140

Single storey extension

Single storey extension - £57,800

Side return extension

Side return extension - £43,075

Install an RSJ

Install an RSJ - £2,340

Outbuilding

Outbuilding - £10,140

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,140

Loft conversion

Loft conversion - £35,063

Build a kitchen extension

Build a kitchen extension - £42,140

Hip to gable loft conversion

Hip to gable loft conversion - £42,140

Granny annexe

Granny annexe - £87,140

Garden office

Garden office - £10,140

Convert a Garage

Convert a Garage - £16,140

Garage

Garage - £18,640

Build a flat roof extension

Build a flat roof extension - £22,140

Build a dormer loft conversion

Build a dormer loft conversion - £42,140

Concrete foundations

Concrete foundations - £6,390

Convert a bungalow loft

Convert a bungalow loft - £29,140

Convert a basement

Convert a basement - £39,075

More extensions & conversions cost guides...