From £1,608
NG Builders is an established extension buildering business in BT74. We come highly recommended and provide competitive quotes for your work.

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in BT74 it ranges from £1,608 (NG Builders based in BT78) to £1,608 (NG Builders based in BT78).
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 BT74 by posting a job with HaMuch and we will send it to extension builders in BT74.
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 - £16,908

Two storey extension - £87,112

Build a timber frame extension - £25,408

Build a swimming pool - £80,408

Single storey extension - £43,160

Side return extension - £34,840

Install an RSJ - £1,608

Outbuilding - £9,408

Build a Mansard loft conversion - £51,408

Loft conversion - £28,200

Build a kitchen extension - £41,408

Hip to gable loft conversion - £41,408

Granny annexe - £86,408

Garden office - £9,408

Convert a Garage - £15,408

Garage - £17,908

Build a flat roof extension - £21,408

Build a dormer loft conversion - £41,408

Concrete foundations - £5,658

Convert a bungalow loft - £28,408

Convert a basement - £30,840