Build a single storey extension in CA12 from £42,840

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Single storey extension cost in CA12 - Sort by rates or availability

From £42,840

(last active 06/03/26)
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Ian Groves

Ian Groves

Location

Penrith, CA12

Ian Groves is an established extension buildering business in CA12. We come highly recommended and provide competitive quotes for your work.

From £45,400

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M & K BUILDERS KESWICK LIMITED

Location

Keswick, CA12

Relax... you have found a reliable extension builder in CA12. M & K BUILDERS KESWICK LIMITED is a friendly and reliable company based in CA12 who c...

Extension builder estimates (based on hourly rates) to build a single storey extension in CA12

Estimates for single storey extension near CA12

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Location in UKHourly RateDaily Rate
Single Storey Extension near Whitehaven£22£221
Single Storey Extension near Carlisle£24£203
Single Storey Extension near Kendal£28£236

Estimates for common extension builder jobs in CA12;

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 - £16,956

Two storey extension

Two storey extension - £87,184

Build a timber frame extension

Build a timber frame extension - £25,456

Build a swimming pool

Build a swimming pool - £80,456

Single storey extension

Single storey extension - £44,120

Side return extension

Side return extension - £35,380

Install an RSJ

Install an RSJ - £1,656

Outbuilding

Outbuilding - £9,456

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,456

Loft conversion

Loft conversion - £28,650

Build a kitchen extension

Build a kitchen extension - £41,456

Hip to gable loft conversion

Hip to gable loft conversion - £41,456

Granny annexe

Granny annexe - £86,456

Garden office

Garden office - £9,456

Convert a Garage

Convert a Garage - £15,456

Garage

Garage - £17,956

Build a flat roof extension

Build a flat roof extension - £21,456

Build a dormer loft conversion

Build a dormer loft conversion - £41,456

Concrete foundations

Concrete foundations - £5,706

Convert a bungalow loft

Convert a bungalow loft - £28,456

Convert a basement

Convert a basement - £31,380

More extensions & conversions cost guides...