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 - £17,548

Two storey extension - £88,072

Build a timber frame extension - £26,048

Build a swimming pool - £81,048

Single storey extension - £55,960

Side return extension - £42,040

Install an RSJ - £2,248

Outbuilding - £10,048

Build a Mansard loft conversion - £52,048

Loft conversion - £34,200

Build a kitchen extension - £42,048

Hip to gable loft conversion - £42,048

Granny annexe - £87,048

Garden office - £10,048

Convert a Garage - £16,048

Garage - £18,548

Build a flat roof extension - £22,048

Build a dormer loft conversion - £42,048

Concrete foundations - £6,298

Convert a bungalow loft - £29,048

Convert a basement - £38,040

More extensions & conversions cost guides...