From £2,216
Relax... you have found a reliable extension builder in Southwold. Aldeburgh Landscaping is a friendly and reliable company based in Southwold who ...
From £1,832
We can take you dream into reality with our team of experienced tradesmen we cover every aspect of building and landscaping including plastering, e...
From £1,776
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £1,968
After 6 years as a member of the Which? Trusted Traders scheme D.A.Elias Builders are proud to receive our latest Certificate, ensuring we...
From £2,224
Reapy property management carry out the following: - Brick / block work - Foundations - Underground drainage - Soft and hard lands...
From £1,672
Experienced extension builder ready to quote for your work. K & M Property Maintenance is the best extension builder in Southwold. No obligation fr...
From £1,760
Garden Wall & Building Specialists is an established and experienced local extension builder in Southwold. Please contact us for a free, no obligat...
From £2,272
S R BUILDERS is an established extension buildering business in Southwold. We come highly recommended and provide competitive quotes for your work....
From £2,008
Need to find an Extension Builder near you for all your extension buildering work?
Swan Builders Ltd provides a local, trusted extension bu...
From £1,848
Need to find an Extension Builder near you for all your extension buildering work?
Home & Garden Services provides a local, trusted extensi...

How much RSJs cost for supply and installation varies depending on the size, type and load-bearing properties, but in Southwold it ranges from £1,672 (K & M Property Maintenance based in NR31) to £2,272 (S R BUILDERS based in NR31).
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 Southwold by posting a job with HaMuch and we will send it to extension builders in Southwold.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Install An RSJ near Waveney | £24 | £200 |
| Install An RSJ near Lowestoft | £24 | £197 |
| Install An RSJ near Gorleston-on-Sea | £25 | £205 |
| Install An RSJ near Suffolk Coastal | £28 | £215 |
| Install An RSJ near Great Yarmouth | £13 | £132 |
| Install An RSJ near Norwich | £25 | £200 |
| Install An RSJ near Stowmarket | £30 | £221 |
| Install An RSJ near Felixstowe | £31 | £231 |
| Install An RSJ near Ipswich | £33 | £235 |
| Install An RSJ near Harwich | £34 | £248 |
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 - £17,258

Two storey extension - £87,636

Build a timber frame extension - £25,758

Build a swimming pool - £80,758

Single storey extension - £50,152

Side return extension - £38,773

Install an RSJ - £1,958

Outbuilding - £9,758

Build a Mansard loft conversion - £51,758

Loft conversion - £31,478

Build a kitchen extension - £41,758

Hip to gable loft conversion - £41,758

Granny annexe - £86,758

Garden office - £9,758

Convert a Garage - £15,758

Garage - £18,258

Build a flat roof extension - £21,758

Build a dormer loft conversion - £41,758

Concrete foundations - £6,008

Convert a bungalow loft - £28,758

Convert a basement - £34,773