From £17,660
Kenmure Joinery Services are here to help customers who need an Extension Builder in Port Glasgow. We offer a competitive rate to complete all your...
From £17,580
Adelphi Design & Construction Ltd is an established and experienced local extension builder in Port Glasgow. Please contact us for a free, no oblig...
From £17,796
Need an Extension Builder in Port Glasgow? Gman-Joinery & Builders has been helping local clients (20 mile radius) with their extension buildering ...
From £17,452
Relax... you have found a reliable extension builder in Port Glasgow. DS Builders is a friendly and reliable company based in Port Glasgow who cons...
From £17,428
J & J Property Services is an established extension buildering business in Port Glasgow. We come highly recommended and provide competitive quotes ...
From £17,308
Boyle Construction Glasgow Ltd is a trusted extension builder serving customers in Port Glasgow and the surrounding area. Contact us to today to ge...
From £16,876
Experienced extension builder ready to quote for your work. Glencroft Builders Ltd is the best extension builder in Port Glasgow. No obligation fre...
From £17,812
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,492
Relax... you have found a reliable extension builder in Port Glasgow. Adrian K Wilson Roofing Specialist is a friendly and reliable company based i...
From £17,788
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,876 (Glencroft Builders Ltd based in G81) to £17,812 (Unibuild Property Services based in KA20), 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 Port Glasgow by posting a job with HaMuch and we will send it to extension builders in Port Glasgow.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Port Glasgow | £32 | £250 |
| Underpin A Building near Greenock | £30 | £243 |
| Underpin A Building near Dumbarton | £29 | £232 |
| Underpin A Building near Renfrewshire | £54 | £398 |
| Underpin A Building near Erskine | £34 | £258 |
| Underpin A Building near Johnstone | £52 | £381 |
| Underpin A Building near Clydebank | £35 | £264 |
| Underpin A Building near Renfrew | £35 | £263 |
| Underpin A Building near Paisley | £34 | £259 |
| Underpin A Building near Bearsden | £34 | £263 |
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 - £17,519

Two storey extension - £88,029

Build a timber frame extension - £26,019

Build a swimming pool - £81,019

Single storey extension - £55,384

Side return extension - £41,716

Install an RSJ - £2,219

Outbuilding - £10,019

Build a Mansard loft conversion - £52,019

Loft conversion - £33,930

Build a kitchen extension - £42,019

Hip to gable loft conversion - £42,019

Granny annexe - £87,019

Garden office - £10,019

Convert a Garage - £16,019

Garage - £18,519

Build a flat roof extension - £22,019

Build a dormer loft conversion - £42,019

Concrete foundations - £6,269

Convert a bungalow loft - £29,019

Convert a basement - £37,716