From £17,276
Relax... you have found a reliable extension builder in BS4. MSH Construction (Bristol) Ltd is a friendly and reliable company based in BS4 who con...
From £17,316
Hourglass Design & Build is an established extension buildering business in BS4. We come highly recommended and provide competitive quotes for your...
From £17,844
Custom Created Interiors are here to help customers who need an Extension Builder in BS4. We offer a competitive rate to complete all your extensio...
From £17,756
Symmetry Design And Build is a trusted extension builder serving customers in BS4 and the surrounding area. Contact us to today to get a competitiv...
From £17,684
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,372
Relax... you have found a reliable extension builder in BS4. Uks is a friendly and reliable company based in BS4 who consider no job as too big or ...
From £17,724
Trusted and professional extension builder in BS4. Experienced in all extension buildering work and keeping within budget and on quote. Cullimore R...
From £17,324
MAKE is an established extension buildering business in BS4. We come highly recommended and provide competitive quotes for your work.
From £17,652
MOBILE .... 07901 808 028 EMAIL .... angel201665@
From £17,364
Nest Design & Build is a trusted extension builder serving customers in BS4 and the surrounding area. Contact us to today to get a competitive quot...

Underpinning ranges from £17,276 (MSH Construction (Bristol) Ltd based in BS4) to £17,844 (Custom Created Interiors based in BS3), 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 BS4 by posting a job with HaMuch and we will send it to extension builders in BS4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Bristol | £33 | £255 |
| Underpin A Building near Kingswood | £34 | £257 |
| Underpin A Building near Clifton | £33 | £255 |
| Underpin A Building near Keynsham | £33 | £251 |
| Underpin A Building near South Gloucestershire | £34 | £260 |
| Underpin A Building near Bradley Stoke | £34 | £259 |
| Underpin A Building near Bath | £32 | £249 |
| Underpin A Building near Portishead | £33 | £247 |
| Underpin A Building near Yate | £34 | £263 |
| Underpin A Building near North Somerset | £32 | £245 |
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 - £17,531

Two storey extension - £88,047

Build a timber frame extension - £26,031

Build a swimming pool - £81,031

Single storey extension - £55,624

Side return extension - £41,851

Install an RSJ - £2,231

Outbuilding - £10,031

Build a Mansard loft conversion - £52,031

Loft conversion - £34,043

Build a kitchen extension - £42,031

Hip to gable loft conversion - £42,031

Granny annexe - £87,031

Garden office - £10,031

Convert a Garage - £16,031

Garage - £18,531

Build a flat roof extension - £22,031

Build a dormer loft conversion - £42,031

Concrete foundations - £6,281

Convert a bungalow loft - £29,031

Convert a basement - £37,851