From £17,252
Need to find an Extension Builder near you for all your extension buildering work?
JM Builders Service provides a local, trusted extension ...
From £17,388
Denis Gleeson is an established extension buildering business in M20. We come highly recommended and provide competitive quotes for your work.
...From £17,260
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,556
We cover all aspects of domestic construction management ,bespoke finishes , extensions ,coloured render-full refurbishment , use high end material...
From £17,436
K T Builders Ltd is a trusted extension builder serving customers in M20 and the surrounding area. Contact us to today to get a competitive quote f...
From £17,356
Bespoke BC should be your first port of call for all building jobs; from landscaping and ground work, to full renovations and everything in between...
From £17,188
Blue Square Construction is an established and experienced local extension builder in M20. Please contact us for a free, no obligation quote and co...
From £17,180
RKF Constructions are here to help customers who need an Extension Builder in M20. We offer a competitive rate to complete all your extension build...
From £17,236
Need to find an Extension Builder near you for all your extension buildering work?
J K S Builder provides a local, trusted extension builde...
From £17,268
Trusted and professional extension builder in M20. Experienced in all extension buildering work and keeping within budget and on quote. B R M S hav...

Underpinning ranges from £17,180 (RKF Constructions based in SK8) to £17,556 (Superiorum contractor & consultant based in M21), 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 M20 by posting a job with HaMuch and we will send it to extension builders in M20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Gatley | £31 | £230 |
| Underpin A Building near Old Trafford | £32 | £236 |
| Underpin A Building near Reddish | £34 | £236 |
| Underpin A Building near Wythenshawe | £31 | £229 |
| Underpin A Building near Cheadle Hulme | £31 | £232 |
| Underpin A Building near Stretford | £32 | £235 |
| Underpin A Building near Manchester | £32 | £236 |
| Underpin A Building near Sale | £32 | £235 |
| Underpin A Building near Stockport | £35 | £234 |
| Underpin A Building near Salford | £32 | £238 |
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 - £17,312

Two storey extension - £87,718

Build a timber frame extension - £25,812

Build a swimming pool - £80,812

Single storey extension - £51,240

Side return extension - £39,385

Install an RSJ - £2,012

Outbuilding - £9,812

Build a Mansard loft conversion - £51,812

Loft conversion - £31,988

Build a kitchen extension - £41,812

Hip to gable loft conversion - £41,812

Granny annexe - £86,812

Garden office - £9,812

Convert a Garage - £15,812

Garage - £18,312

Build a flat roof extension - £21,812

Build a dormer loft conversion - £41,812

Concrete foundations - £6,062

Convert a bungalow loft - £28,812

Convert a basement - £35,385