From £2,168
Hoddesdon, EN11
Experienced extension builder ready to quote for your work. T&R Builders Ltd is the best extension builder in EN11. No obligation free quotes and m...
From £2,384
We know it can be hard to find a builder that you can rely on. Donema Construction Vision Ltd has a wealth of experience and is known as one of the...
From £2,304
Hoddesdon, EN11
RECESS CONSTRUCTION LTD are here to help customers who need an Extension Builder in EN11. We offer a competitive rate to complete all your extensio...
From £2,624
Hopson Bros Services is a trusted extension builder serving customers in EN11 and the surrounding area. Contact us to today to get a competitive qu...
From £2,528
Hertfordshire, EN11
Jarman Tew Design Ltd is an established and experienced local extension builder in EN11. Please contact us for a free, no obligation quote and comp...
From £2,352
Need an Extension Builder in EN11? M J S BUILDERS T/A has been helping local clients (10 mile radius) with their extension buildering jobs for many...
From £2,264
Hertfordshire, EN11
Design and Create Solutions are a full-service UK based family owned carpentry company, committed to delivering a superior product and exceeding cl...
From £2,424
Need an Extension Builder in EN11? TJJ Construction Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
From £3,592
Hoddesdon, EN11
Experienced extension builder ready to quote for your work. Atlas Facilities Services Limited is the best extension builder in EN11. No obligation ...
From £2,584
D E BRACKEN BUILDING SERVICES is an established and experienced local extension builder in EN11. Please contact us for a free, no obligation quote ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in EN11 it ranges from £2,168 (T&R Builders Ltd based in EN11) to £3,592 (Atlas Facilities Services Limited based in EN11).
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 EN11 by posting a job with HaMuch and we will send it to extension builders in EN11.
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 - £17,822

Two storey extension - £88,484

Build a timber frame extension - £26,322

Build a swimming pool - £81,322

Single storey extension - £61,448

Side return extension - £45,127

Install an RSJ - £2,522

Outbuilding - £10,322

Build a Mansard loft conversion - £52,322

Loft conversion - £36,773

Build a kitchen extension - £42,322

Hip to gable loft conversion - £42,322

Granny annexe - £87,322

Garden office - £10,322

Convert a Garage - £16,322

Garage - £18,822

Build a flat roof extension - £22,322

Build a dormer loft conversion - £42,322

Concrete foundations - £6,572

Convert a bungalow loft - £29,322

Convert a basement - £41,127