From £2,536
We are a Kingston Upon Thames based building company who specialise in high quality workmanship, building beautiful homes for clients to be proud o...
From £2,224
Surrey, KT2
Need an Extension Builder in Coombe? Kingston Building Services has been helping local clients (10 mile radius) with their extension buildering job...
From £2,432
Kingston Building Services is an established and experienced local extension builder in Coombe. Please contact us for a free, no obligation quote a...
From £2,112
Surrey, KT2
Experienced extension builder ready to quote for your work. JMS Design + Construction is the best extension builder in Coombe. No obligation free q...
From £2,376
Your Perfect Renovation are an accomplished, professional business with the expertise and vision. We are building contractor specialising in solu...
From £2,528
Coombe, KT2
Need an Extension Builder in Coombe? ADAMSKI CONSTRUCTION LTD has been helping local clients (10 mile radius) with their extension buildering jobs ...
From £2,648
Experienced extension builder ready to quote for your work. Aranstruct is the best extension builder in Coombe. No obligation free quotes and many ...
From £2,168
London, KT2
Ginger Dog Homes Ltd is an established and experienced local extension builder in Coombe. Please contact us for a free, no obligation quote and com...
From £2,160
Hardings houses are here to help customers who need an Extension Builder in Coombe. We offer a competitive rate to complete all your extension buil...
From £2,552
MZ Building Services are here to help customers who need an Extension Builder in Coombe. We offer a competitive rate to complete all your extension...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Coombe it ranges from £2,112 (JMS Design + Construction based in KT2) to £2,648 (Aranstruct based in Kt2).
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 Coombe by posting a job with HaMuch and we will send it to extension builders in Coombe.
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 - £17,674

Two storey extension - £88,260

Build a timber frame extension - £26,174

Build a swimming pool - £81,174

Single storey extension - £58,472

Side return extension - £43,453

Install an RSJ - £2,374

Outbuilding - £10,174

Build a Mansard loft conversion - £52,174

Loft conversion - £35,378

Build a kitchen extension - £42,174

Hip to gable loft conversion - £42,174

Granny annexe - £87,174

Garden office - £10,174

Convert a Garage - £16,174

Garage - £18,674

Build a flat roof extension - £22,174

Build a dormer loft conversion - £42,174

Concrete foundations - £6,424

Convert a bungalow loft - £29,174

Convert a basement - £39,453