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 - £16,908

Two storey extension - £87,112

Build a timber frame extension - £25,408

Build a swimming pool - £80,408

Single storey extension - £43,160

Side return extension - £34,840

Install an RSJ - £1,608

Outbuilding - £9,408

Build a Mansard loft conversion - £51,408

Loft conversion - £28,200

Build a kitchen extension - £41,408

Hip to gable loft conversion - £41,408

Granny annexe - £86,408

Garden office - £9,408

Convert a Garage - £15,408

Garage - £17,908

Build a flat roof extension - £21,408

Build a dormer loft conversion - £41,408

Concrete foundations - £5,658

Convert a bungalow loft - £28,408

Convert a basement - £30,840

More extensions & conversions cost guides...