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SH Enterprise
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
Torrington
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
London Trowel Co.
Relax... you have found a reliable extension builder in N1. London Trowel Co. is a friendly and reliable company based in N1 who consider no job as...
Thermodynamic Building Services Ltd
Trusted and professional extension builder in N1. Experienced in all extension buildering work and keeping within budget and on quote. Thermodynami...
First guard Roofing
Darren Bergin
Relax... you have found a reliable extension builder in N1. First guard Roofing is a friendly and reliable company based in N1 who consider no job ...
CK Constructions & Development Ltd
CK Constructions & Development Ltd is a trusted extension builder serving customers in N1 and the surrounding area. Contact us to today to get a co...
GS Fabric Ltd
GS Fabric Ltd is an established and experienced local extension builder in N1. Please contact us for a free, no obligation quote and competitive ra...
JM Building Services
JM Building Services is a trusted extension builder serving customers in N1 and the surrounding area. Contact us to today to get a competitive quot...
Andreas Thomas Demetri
Andreas Thomas Demetri is a trusted extension builder serving customers in N1 and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser
Buildwiser is a trusted extension builder serving customers in N1 and the surrounding area. Contact us to today to get a competitive quote for exte...
RSJ cost in N1
How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in N1 it ranges from £2,128 (GS Fabric Ltd based in E2) to £2,576 (CK Constructions & Development Ltd based in WC1N).
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 N1 by posting a job with HaMuch and we will send it to extension builders in N1.
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Estimates for common extension builder jobs in N1;
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 - £17,634
Two storey extension - £88,202
Build a timber frame extension - £26,134
Build a swimming pool - £81,134
Single storey extension - £57,688
Side return extension - £43,012
Install an RSJ - £2,334
Outbuilding - £10,134
Build a Mansard loft conversion - £52,134
Loft conversion - £35,010
Build a kitchen extension - £42,134
Hip to gable loft conversion - £42,134
Granny annexe - £87,134
Garden office - £10,134
Convert a Garage - £16,134
Garage - £18,634
Build a flat roof extension - £22,134
Build a dormer loft conversion - £42,134
Concrete foundations - £6,384
Convert a bungalow loft - £29,134
Convert a basement - £39,012