Cost to Build a Single Storey Extension in BR4

Build a single storey extension in BR4 from £46,360

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Single storey extension cost in BR4 - Sort by rates or availability

Extension builder estimates (based on hourly rates) to build a single storey extension in BR4

Estimates for single storey extension near BR4

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Borough in London
Single Storey Extension in West Wickam
Single Storey Extension in Keston
Single Storey Extension in Beckenham
Single Storey Extension in Bromley
Single Storey Extension in Croydon
Single Storey Extension in Croydon
Single Storey Extension in Penge
Single Storey Extension in South Norwood
Single Storey Extension in Sanderstead
Single Storey Extension in Sydenham

Estimates for common extension builder jobs in BR4;

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 - £17,569

Two storey extension

Two storey extension - £88,103

Build a timber frame extension

Build a timber frame extension - £26,069

Build a swimming pool

Build a swimming pool - £81,069

Single storey extension

Single storey extension - £56,376

Side return extension

Side return extension - £42,274

Install an RSJ

Install an RSJ - £2,269

Outbuilding

Outbuilding - £10,069

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,069

Loft conversion

Loft conversion - £34,395

Build a kitchen extension

Build a kitchen extension - £42,069

Hip to gable loft conversion

Hip to gable loft conversion - £42,069

Granny annexe

Granny annexe - £87,069

Garden office

Garden office - £10,069

Convert a Garage

Convert a Garage - £16,069

Garage

Garage - £18,569

Build a flat roof extension

Build a flat roof extension - £22,069

Build a dormer loft conversion

Build a dormer loft conversion - £42,069

Concrete foundations

Concrete foundations - £6,319

Convert a bungalow loft

Convert a bungalow loft - £29,069

Convert a basement

Convert a basement - £38,274

More extensions & conversions cost guides...