Mariusz Mika
MBuilding are here to help customers who need an Extension Builder in Arun. We offer a competitive rate to complete all your extension buildering j...
Futureways Design and Build are here to help customers who need an Extension Builder in Arun. We offer a competitive rate to complete all your exte...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Arun. Experienced in all extension buildering work and keeping within budget and on quote. Stretch My...
K A Griffin General Builder is an established extension buildering business in Arun. We come highly recommended and provide competitive quotes for ...
Need to find an Extension Builder near you for all your extension buildering work?
Knights Construction provides a local, trusted extension...
Trusted and professional extension builder in Arun. Experienced in all extension buildering work and keeping within budget and on quote. Paul Ramse...
Need to find an Extension Builder near you for all your extension buildering work?
FMB CONSTRUCTION LTD provides a local, trusted extension...

Underpinning ranges from £17,228 (Optimum Building Solutions Ltd based in PO21) to £17,700 (Alan Pacy Builder based in BN12), 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 Arun by posting a job with HaMuch and we will send it to extension builders in Arun.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Arun | £35 | £241 |
| Underpin A Building near Littlehampton | £35 | £241 |
| Underpin A Building near Rustington | £35 | £242 |
| Underpin A Building near Bognor Regis | £35 | £247 |
| Underpin A Building near Worthing | £35 | £249 |
| Underpin A Building near Chichester | £34 | £242 |
| Underpin A Building near Lancing | £36 | £249 |
| Underpin A Building near Shoreham-by-Sea | £36 | £250 |
| Underpin A Building near Havant & Waterloo | £35 | £248 |
| Underpin A Building near Havant | £35 | £249 |
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 - £17,452

Two storey extension - £87,928

Build a timber frame extension - £25,952

Build a swimming pool - £80,952

Single storey extension - £54,040

Side return extension - £40,960

Install an RSJ - £2,152

Outbuilding - £9,952

Build a Mansard loft conversion - £51,952

Loft conversion - £33,300

Build a kitchen extension - £41,952

Hip to gable loft conversion - £41,952

Granny annexe - £86,952

Garden office - £9,952

Convert a Garage - £15,952

Garage - £18,452

Build a flat roof extension - £21,952

Build a dormer loft conversion - £41,952

Concrete foundations - £6,202

Convert a bungalow loft - £28,952

Convert a basement - £36,960