From £2,288
Abbots Langley, WD5
Need an Extension Builder in WD5? PM HOBBS BUILDING SERVICES has been helping local clients (10 mile radius) with their extension buildering jobs f...
From £2,640
Need to find an Extension Builder near you for all your extension buildering work?
Rob Higgs Building & Carpentry provides a local, trusted...
From £2,336
Experienced extension builder ready to quote for your work. Murati Building LTD is the best extension builder in WD5. No obligation free quotes and...
From £2,264
Trusted and professional extension builder in WD5. Experienced in all extension buildering work and keeping within budget and on quote. Total Refur...
From £2,616
M DUNNE BUILDER is a trusted extension builder serving customers in WD5 and the surrounding area. Contact us to today to get a competitive quote fo...
From £2,640
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,312
J Pellow & Son Ltd are here to help customers who need an Extension Builder in WD5. We offer a competitive rate to complete all your extension buil...
From £3,272
Hello I am Emilian , the proud owner of Eeoc Ltd, A little about me With many happy and returning customers over the last 14 years, y...
From £3,704
We are experienced and skilled landscapers, covering a wide range of landscape gardening, driveway installations and groundworks. With over 15 year...
From £2,080
Relax... you have found a reliable extension builder in WD5. Crown Building is a friendly and reliable company based in WD5 who consider no job as ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in WD5 it ranges from £2,080 (Crown Building based in WD24) to £3,704 (BMS Landscaping & Paving LTD based in WD24).
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 WD5 by posting a job with HaMuch and we will send it to extension builders in WD5.
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 - £17,915

Two storey extension - £88,623

Build a timber frame extension - £26,415

Build a swimming pool - £81,415

Single storey extension - £63,304

Side return extension - £46,171

Install an RSJ - £2,615

Outbuilding - £10,415

Build a Mansard loft conversion - £52,415

Loft conversion - £37,643

Build a kitchen extension - £42,415

Hip to gable loft conversion - £42,415

Granny annexe - £87,415

Garden office - £10,415

Convert a Garage - £16,415

Garage - £18,915

Build a flat roof extension - £22,415

Build a dormer loft conversion - £42,415

Concrete foundations - £6,665

Convert a bungalow loft - £29,415

Convert a basement - £42,171