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 - £16,756

Two storey extension - £86,884

Build a timber frame extension - £25,256

Build a swimming pool - £80,256

Single storey extension - £40,120

Side return extension - £33,130

Install an RSJ - £1,456

Outbuilding - £9,256

Build a Mansard loft conversion - £51,256

Loft conversion - £26,775

Build a kitchen extension - £41,256

Hip to gable loft conversion - £41,256

Granny annexe - £86,256

Garden office - £9,256

Convert a Garage - £15,256

Garage - £17,756

Build a flat roof extension - £21,256

Build a dormer loft conversion - £41,256

Concrete foundations - £5,506

Convert a bungalow loft - £28,256

Convert a basement - £29,130

More extensions & conversions cost guides...