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 - £17,132

Two storey extension - £87,448

Build a timber frame extension - £25,632

Build a swimming pool - £80,632

Single storey extension - £47,640

Side return extension - £37,360

Install an RSJ - £1,832

Outbuilding - £9,632

Build a Mansard loft conversion - £51,632

Loft conversion - £30,300

Build a kitchen extension - £41,632

Hip to gable loft conversion - £41,632

Granny annexe - £86,632

Garden office - £9,632

Convert a Garage - £15,632

Garage - £18,132

Build a flat roof extension - £21,632

Build a dormer loft conversion - £41,632

Concrete foundations - £5,882

Convert a bungalow loft - £28,632

Convert a basement - £33,360

More extensions & conversions cost guides...