From £55,960
Flow-Right Construction is an established extension buildering business in Walthamstow. We come highly recommended and provide competitive quotes f...
From £53,880
Walthamstow London, E17
Italian Home Renovation are here to help customers who need an Extension Builder in Walthamstow. We offer a competitive rate to complete all your e...
From £64,760
Specialized in advising and implement the choices of the most demanding customers. From inerior design with also crafted tailored solutions and the...
From £55,960
Walthamstow, E17
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £57,720
Walthamstow Londonderry, E17
London Airports Taxi are here to help customers who need an Extension Builder in Walthamstow. We offer a competitive rate to complete all your exte...
From £81,240
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £97,720
Walthamstow London, E17
We are one of the leading specialists company in London and we believe in providing a wide range of services to many of our clients. We have extens...
From £56,280
Gold & Berg are a London-based, international construction services company and are a leading builder in diverse market segments. The company has e...
From £59,320
Walthamstow, E17
Relax... you have found a reliable extension builder in Walthamstow. Amwell Construction Ltd is a friendly and reliable company based in Walthamsto...

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 - £17,938

Two storey extension - £88,658

Build a timber frame extension - £26,438

Build a swimming pool - £81,438

Single storey extension - £63,768

Side return extension - £46,432

Install an RSJ - £2,638

Outbuilding - £10,438

Build a Mansard loft conversion - £52,438

Loft conversion - £37,860

Build a kitchen extension - £42,438

Hip to gable loft conversion - £42,438

Granny annexe - £87,438

Garden office - £10,438

Convert a Garage - £16,438

Garage - £18,938

Build a flat roof extension - £22,438

Build a dormer loft conversion - £42,438

Concrete foundations - £6,688

Convert a bungalow loft - £29,438

Convert a basement - £42,432