From £16,104
London, W4
Starling Constructions Ltd is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote and c...
From £16,488
Greater London, W4
Kuta Design and Build Limited is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote an...
From £16,304
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £16,024
Greater London, W4
Relax... you have found a reliable extension builder in W4. Elite London Construction is a friendly and reliable company based in W4 who consider n...
From £16,152
Good Design and Build are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your extension bu...
From £16,216
Londonderry, W4
Guardian Developments is a west London based design and build company, specialising in residential projects including extensions, refurbishments a...
From £16,080
Relax... you have found a reliable extension builder in W4. Zulufish is a friendly and reliable company based in W4 who consider no job as too big ...
From £16,336
Midlothian, W4
Smart Property Sourcing is a trusted extension builder serving customers in W4 and the surrounding area. Contact us to today to get a competitive q...
From £16,064
Pipedreams Interiors Ltd are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your extension...

Garage conversions in W4 typically range from £16,000 (SxS Design & Build based in W4) to £16,488 (Kuta Design and Build Limited based in W4), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in W4 who will be happy to help.
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 - £17,677

Two storey extension - £88,265

Build a timber frame extension - £26,177

Build a swimming pool - £81,177

Single storey extension - £58,536

Side return extension - £43,489

Install an RSJ - £2,377

Outbuilding - £10,177

Build a Mansard loft conversion - £52,177

Loft conversion - £35,408

Build a kitchen extension - £42,177

Hip to gable loft conversion - £42,177

Granny annexe - £87,177

Garden office - £10,177

Convert a Garage - £16,177

Garage - £18,677

Build a flat roof extension - £22,177

Build a dormer loft conversion - £42,177

Concrete foundations - £6,427

Convert a bungalow loft - £29,177

Convert a basement - £39,489