From £18,900
Starfish Properties is a trusted extension builder serving customers in W1 and the surrounding area. Contact us to today to get a competitive quote...
From £18,588
Dominic Payte - Design & Build is an established extension buildering business in W1. We come highly recommended and provide competitive quotes for...
From £18,444
Hestia Contractors Ltd are here to help customers who need an Extension Builder in W1. We offer a competitive rate to complete all your extension b...
From £18,540
Independent construction company we have wide range of experience, including newconstruction, renovation, design build and retail stores. We provid...
From £18,732
We are specialised in: demolition services, foundation services, property extension, general bricklaying, internal renovation and configuration, ca...
From £18,932
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £18,564
Experienced extension builder ready to quote for your work. Cornerstone is the best extension builder in W1. No obligation free quotes and many hap...
From £18,484
JK Doors is a trusted extension builder serving customers in W1 and the surrounding area. Contact us to today to get a competitive quote for extens...
From £18,788
Grand Phase Ltd is a trusted extension builder serving customers in W1 and the surrounding area. Contact us to today to get a competitive quote for...
From £18,812
Teammax LTD are here to help customers who need an Extension Builder in W1. We offer a competitive rate to complete all your extension buildering j...

Builders charge between £18,444 (Hestia Contractors Ltd based in W1B) and £18,932 (Sehem Design based in W1F) in W1 to build a garage, but these costs are only estimates.
Comparing extension builders estimates for building a garage gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get real quotes to build a new garage in W1 by posting a job with HaMuch and we will send it to extension builders in W1.
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| Garage in City of Westminster |
| Garage in Regent Street |
| Garage in Oxford Street |
| Garage in Savile Row |
| Garage in Harley Street |
| Garage in Soho |
| Garage in Fitzrovia |
| Garage in Mayfair |
| Garage in Paddington |
| Garage in Tottenham Court Road |
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 - £17,678

Two storey extension - £88,268

Build a timber frame extension - £26,178

Build a swimming pool - £81,178

Single storey extension - £58,568

Side return extension - £43,507

Install an RSJ - £2,378

Outbuilding - £10,178

Build a Mansard loft conversion - £52,178

Loft conversion - £35,423

Build a kitchen extension - £42,178

Hip to gable loft conversion - £42,178

Granny annexe - £87,178

Garden office - £10,178

Convert a Garage - £16,178

Garage - £18,678

Build a flat roof extension - £22,178

Build a dormer loft conversion - £42,178

Concrete foundations - £6,428

Convert a bungalow loft - £29,178

Convert a basement - £39,507