From £2,552
Tadworth, KT20
AG Design And Build Limited is an established extension buildering business in KT20. We come highly recommended and provide competitive quotes for ...
From £2,664
At PZ Refurbishment we offer all aspects of Building, Roofing, Electrical, Joinery, Plumbing, Heating and more. We can carry out a large variety of...
From £3,080
Tadworth, KT20
Need an Extension Builder in KT20? London Bespoke Build has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £2,224
Our family-run building services company Building and Electricals Ltd has over 40 combined years of experience in the industry. We help customers i...
From £2,296
Tadworth, KT20
Relax... you have found a reliable extension builder in KT20. MSI is a friendly and reliable company based in KT20 who consider no job as too big o...
From £2,608
We pride ourselves on our approach, project delivery project management and end product. We are a full service business, so can handle your project...
From £2,168
Tadworth, KT20
Trusted and professional extension builder in KT20. Experienced in all extension buildering work and keeping within budget and on quote. D B Jones ...
From £2,536
Experienced extension builder ready to quote for your work. Abstract Renovations Ltd is the best extension builder in KT20. No obligation free quot...
From £2,104
Tadworth, KT20
Experienced extension builder ready to quote for your work. Able Construction T/A is the best extension builder in KT20. No obligation free quotes ...
From £2,240
Need an Extension Builder in KT20? C Dingle Builders & Decorators has been helping local clients (10 mile radius) with their extension buildering j...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in KT20 it ranges from £2,104 (Able Construction T/A based in KT20) to £3,080 (London Bespoke Build based in KT20).
Comparing extension builders estimates for fitting an RSJ gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get rates and quotes to install an RSJ in KT20 by posting a job with HaMuch and we will send it to extension builders in KT20.
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 - £17,747

Two storey extension - £88,371

Build a timber frame extension - £26,247

Build a swimming pool - £81,247

Single storey extension - £59,944

Side return extension - £44,281

Install an RSJ - £2,447

Outbuilding - £10,247

Build a Mansard loft conversion - £52,247

Loft conversion - £36,068

Build a kitchen extension - £42,247

Hip to gable loft conversion - £42,247

Granny annexe - £87,247

Garden office - £10,247

Convert a Garage - £16,247

Garage - £18,747

Build a flat roof extension - £22,247

Build a dormer loft conversion - £42,247

Concrete foundations - £6,497

Convert a bungalow loft - £29,247

Convert a basement - £40,281