From £17,492
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,764
JLS Building Services was established in 2004, the company has many years of experience.JLS pride ourselves on giving 100% custome...
From £17,220
Need to find an Extension Builder near you for all your extension buildering work?
JLS Building Services provides a local, trusted extensio...
From £17,300
Relax... you have found a reliable extension builder in SS1. L C P Carpentry is a friendly and reliable company based in SS1 who consider no job as...
From £17,500
I have been in this industry for over 22 years and for the last fifteen years I have been getting a large percentage of my work through Which? Trus...
From £17,364
Need to find an Extension Builder near you for all your extension buildering work?
M&M Builders provides a local, trusted extension builder...
From £17,604
Fine Build Homes Ltd are here to help customers who need an Extension Builder in SS1. We offer a competitive rate to complete all your extension bu...
From £17,652
Experienced extension builder ready to quote for your work. House Q Ltd is the best extension builder in SS1. No obligation free quotes and many ha...
From £17,668
Need to find an Extension Builder near you for all your extension buildering work?
Wrights Building Services provides a local, trusted exte...

Underpinning ranges from £17,220 (JLS Building Services based in SS1) to £17,764 (JLS Building Services Ltd based in SS1), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in SS1 by posting a job with HaMuch and we will send it to extension builders in SS1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Southend-on-Sea | £33 | £215 |
| Underpin A Building near Canvey Island | £34 | £224 |
| Underpin A Building near Thundersley | £34 | £223 |
| Underpin A Building near Rayleigh | £34 | £223 |
| Underpin A Building near Wickford | £34 | £225 |
| Underpin A Building near Basildon | £34 | £220 |
| Underpin A Building near Stanford-le-Hope | £35 | £222 |
| Underpin A Building near Gillingham | £34 | £219 |
| Underpin A Building near Sittingbourne | £31 | £217 |
| Underpin A Building near Billericay | £34 | £219 |
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 - £17,489

Two storey extension - £87,983

Build a timber frame extension - £25,989

Build a swimming pool - £80,989

Single storey extension - £54,776

Side return extension - £41,374

Install an RSJ - £2,189

Outbuilding - £9,989

Build a Mansard loft conversion - £51,989

Loft conversion - £33,645

Build a kitchen extension - £41,989

Hip to gable loft conversion - £41,989

Granny annexe - £86,989

Garden office - £9,989

Convert a Garage - £15,989

Garage - £18,489

Build a flat roof extension - £21,989

Build a dormer loft conversion - £41,989

Concrete foundations - £6,239

Convert a bungalow loft - £28,989

Convert a basement - £37,374