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Select your affordable Nantwich extension builder
Andy Davies
Nantwich, CW5
Progress Construction are here to help customers who need an Extension Builder in Nantwich. We offer a competitive rate to complete all your extens...
Nantwich, CW5
Relax... you have found a reliable extension builder in Nantwich. House Heroes is a friendly and reliable company based in Nantwich who consider no...
From £2,248
Rik Seaton (Brickwork Specialist) is an established and experienced local extension builder in Nantwich. Please contact us for a free, no obligatio...
From £2,104
Relax... you have found a reliable extension builder in Nantwich. Hough Construction is a friendly and reliable company based in Nantwich who consi...
From £1,416
Anthony Mcconnell
Relax... you have found a reliable extension builder in Nantwich. AJM Building is a friendly and reliable company based in Nantwich who consider no...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Nantwich it ranges from £1,416 (AJM Building based in CW2) to £2,248 (Rik Seaton (Brickwork Specialist) based in CW1).
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 Nantwich by posting a job with HaMuch and we will send it to extension builders in Nantwich.
"RSJ corrosion repair quote" - CREWE, job posted 07/08/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Crewe & Nantwich | £28 | £220 |
| Install An RSJ near Crewe | £29 | £224 |
| Install An RSJ near Winsford | £31 | £232 |
| Install An RSJ near Newcastle-under-Lyme | £30 | £228 |
| Install An RSJ near Congleton | £28 | £227 |
| Install An RSJ near Stoke-on-Trent | £29 | £226 |
| Install An RSJ near Chester | £32 | £220 |
| Install An RSJ near Wrexham Maelor | £34 | £261 |
| Install An RSJ near Runcorn | £33 | £228 |
| Install An RSJ near Vale Royal | £35 | £251 |
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 - £17,217

Two storey extension - £87,575

Build a timber frame extension - £25,717

Build a swimming pool - £80,717

Single storey extension - £49,336

Side return extension - £38,314

Install an RSJ - £1,917

Outbuilding - £9,717

Build a Mansard loft conversion - £51,717

Loft conversion - £31,095

Build a kitchen extension - £41,717

Hip to gable loft conversion - £41,717

Granny annexe - £86,717

Garden office - £9,717

Convert a Garage - £15,717

Garage - £18,217

Build a flat roof extension - £21,717

Build a dormer loft conversion - £41,717

Concrete foundations - £5,967

Convert a bungalow loft - £28,717

Convert a basement - £34,314