Cre8tive Contractors Ltd are here to help customers who need an Extension Builder in BR4. We offer a competitive rate to complete all your extensio...
Relax... you have found a reliable extension builder in BR4. L M G Building Services (London) Ltd is a friendly and reliable company based in BR4 w...
Experienced extension builder ready to quote for your work. Aviemore Building Contractors Ltd is the best extension builder in BR4. No obligation f...
Vas OPetrov
QC11 LTD are here to help customers who need an Extension Builder in BR4. We offer a competitive rate to complete all your extension buildering job...
Relax... you have found a reliable extension builder in BR4. SMC Property Maintenance is a friendly and reliable company based in BR4 who consider ...
Stuart Bogazzi
Working as a builder for over 20 years now.
Family run business
Can sort any problem out and help build your dreams.
West Wickam, BR4
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Experienced extension builder ready to quote for your work. S G W is the best extension builder in BR4. No obligation free quotes and many happy cu...
West Wickam, BR4
John Smith Builders is a trusted extension builder serving customers in BR4 and the surrounding area. Contact us to today to get a competitive quot...
From £42,120
Experienced extension builder ready to quote for your work. Hursley Developments Ltd is the best extension builder in BR4. No obligation free quote...

In BR4, prices for dormer loft conversions range from £41,568 (Oaksure Construction based in CR0) to £42,424 (S G W based in BR4), 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 BR4. 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 - £17,569

Two storey extension - £88,103

Build a timber frame extension - £26,069

Build a swimming pool - £81,069

Single storey extension - £56,376

Side return extension - £42,274

Install an RSJ - £2,269

Outbuilding - £10,069

Build a Mansard loft conversion - £52,069

Loft conversion - £34,395

Build a kitchen extension - £42,069

Hip to gable loft conversion - £42,069

Granny annexe - £87,069

Garden office - £10,069

Convert a Garage - £16,069

Garage - £18,569

Build a flat roof extension - £22,069

Build a dormer loft conversion - £42,069

Concrete foundations - £6,319

Convert a bungalow loft - £29,069

Convert a basement - £38,274