From £1,960
Chertsey, KT16
We are a company based in South London, with a strong will to work and to do the best job possible every tine we start a job (big or small) because...
From £2,496
Relax... you have found a reliable extension builder in KT16. London Rated Roofing is a friendly and reliable company based in KT16 who consider no...
From £1,872
Chertsey, KT16
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,208
Need to find an Extension Builder near you for all your extension buildering work?
GS Wood Building Services provides a local, trusted exte...
From £2,336
EcoWoodDesign are here to help customers who need an Extension Builder in KT16. We offer a competitive rate to complete all your extension builderi...
From £2,664
Kandy Build and Construction Ltd is an established extension buildering business in KT16. We come highly recommended and provide competitive quotes...
From £2,616
Need to find an Extension Builder near you for all your extension buildering work?
Tolwey provides a local, trusted extension buildering se...
From £2,280
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £2,280
General Building, Landscaping and Driveway Specialists. Some of the tasks we complete tasks such as refurbishments, extensions and conversions to d...
From £2,512
From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in KT16 it ranges from £1,872 (Inspiral Construction based in KT16) to £2,664 (Kandy Build and Construction Ltd based in TW20).
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 KT16 by posting a job with HaMuch and we will send it to extension builders in KT16.
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 - £17,622

Two storey extension - £88,184

Build a timber frame extension - £26,122

Build a swimming pool - £81,122

Single storey extension - £57,448

Side return extension - £42,877

Install an RSJ - £2,322

Outbuilding - £10,122

Build a Mansard loft conversion - £52,122

Loft conversion - £34,898

Build a kitchen extension - £42,122

Hip to gable loft conversion - £42,122

Granny annexe - £87,122

Garden office - £10,122

Convert a Garage - £16,122

Garage - £18,622

Build a flat roof extension - £22,122

Build a dormer loft conversion - £42,122

Concrete foundations - £6,372

Convert a bungalow loft - £29,122

Convert a basement - £38,877