Trusted and professional extension builder in PE13. Experienced in all extension buildering work and keeping within budget and on quote. RBAM Const...
Trinity Green Building Contractors are here to help customers who need an Extension Builder in PE13. We offer a competitive rate to complete all yo...
Trusted and professional extension builder in PE13. Experienced in all extension buildering work and keeping within budget and on quote. Moores Roo...
Your Local builders in Peterborough
GMF Builders is owned and managed by Graham Fuller who has approximately 23 years experience in the ...
Member since January 2026
Welcome to Price & Sons! We are a building company based in Peterborough. If you are interested in a quote please get in touch with us!
Eric Handyman- builder is an established and experienced local extension builder in PE13. Please contact us for a free, no obligation quote and com...
DAR CONSTRUCTION are here to help customers who need an Extension Builder in PE13. We offer a competitive rate to complete all your extension build...
Lauren Builders are a domestic and commercial building company based in Peterborough, and is owned and run by Father & Son, Mick & Lee Gapper, who ...
Relax... you have found a reliable extension builder in PE13. B & K BUILDING SERVICES is a friendly and reliable company based in PE13 who consider...
Need to find an Extension Builder near you for all your extension buildering work?
A Sindall Building provides a local, trusted extension b...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in PE13 it ranges from £1,728 (B & K BUILDING SERVICES based in PE30) to £2,600 (PSP Developments based in PE6).
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 PE13 by posting a job with HaMuch and we will send it to extension builders in PE13.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Wisbech | £34 | £255 |
| Install An RSJ near King's Lynn | £33 | £254 |
| Install An RSJ near Spalding | £32 | £238 |
| Install An RSJ near Kings Lynn & West Norfolk | £31 | £238 |
| Install An RSJ near Peterborough | £40 | £281 |
| Install An RSJ near Boston | £28 | £262 |
| Install An RSJ near Ely | £40 | £279 |
| Install An RSJ near Huntingdonshire | £36 | £290 |
| Install An RSJ near Stamford | £35 | £248 |
| Install An RSJ near Huntingdon | £38 | £284 |
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 - £17,525

Two storey extension - £88,037

Build a timber frame extension - £26,025

Build a swimming pool - £81,025

Single storey extension - £55,496

Side return extension - £41,779

Install an RSJ - £2,225

Outbuilding - £10,025

Build a Mansard loft conversion - £52,025

Loft conversion - £33,983

Build a kitchen extension - £42,025

Hip to gable loft conversion - £42,025

Granny annexe - £87,025

Garden office - £10,025

Convert a Garage - £16,025

Garage - £18,525

Build a flat roof extension - £22,025

Build a dormer loft conversion - £42,025

Concrete foundations - £6,275

Convert a bungalow loft - £29,025

Convert a basement - £37,779