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Need to find an Extension Builder near you for all your extension buildering work?
Slick Construction Ltd provides a local, trusted extensi...
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. TFC Constru...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
AMBUILD LTD provides a local, trusted extension builderi...
Michael Kramarz, MK Builds are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extens...
From £41,904
Twickenham, TW1
Masterbuild & Design Ltd is an established and experienced local extension builder in TW1. Please contact us for a free, no obligation quote and co...
From £42,312
Burbeck Project Management is a residential property development management company, working with clients across London to plan, design, and build ...
From £42,160
Greater London, TW1
BC 10 Builder Services are here to help customers who need an Extension Builder in TW1. We offer a competitive rate to complete all your extension ...
From £42,064
Trusted and professional extension builder in TW1. Experienced in all extension buildering work and keeping within budget and on quote. Habitus Hom...

In TW1, prices for dormer loft conversions range from £41,896 (Tota Builders based in TW2) to £42,416 (TFC Construction based in TW10), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in TW1. Post your job on HaMuch now and we'll put you in touch with available extension builders.
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 - £17,606

Two storey extension - £88,158

Build a timber frame extension - £26,106

Build a swimming pool - £81,106

Single storey extension - £57,112

Side return extension - £42,688

Install an RSJ - £2,306

Outbuilding - £10,106

Build a Mansard loft conversion - £52,106

Loft conversion - £34,740

Build a kitchen extension - £42,106

Hip to gable loft conversion - £42,106

Granny annexe - £87,106

Garden office - £10,106

Convert a Garage - £16,106

Garage - £18,606

Build a flat roof extension - £22,106

Build a dormer loft conversion - £42,106

Concrete foundations - £6,356

Convert a bungalow loft - £29,106

Convert a basement - £38,688