SANDSTONE BUILDERS T/A is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today to get a compe...
From £17,684
Our building services company MS Builders (South West) Ltd has over 17 years’ experience in the industry. We have been helping customers in Liske...
From £17,588
Need an Extension Builder in Lostwithiel? DAVEY CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jo...
From £17,284
HAM & PEARCE CONSTRUCTION LTD is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today to get ...
From £17,708
We are specialist in All aspects of Masonry & General Building Works. We also offer a Design and Build service to suit your requirements.At Burton ...
From £17,340
Aston Construction Project Management is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today...
From £17,588
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,604
We are a part of the award-winning Refresh Renovation franchise network.Whether you want a simple bathroom remodel, or a large double storey extens...
From £17,604
Need an Extension Builder in Lostwithiel? Paul Clarke Architectural Builders has been helping local clients (20 mile radius) with their extension b...
From £17,564
Probuild was set up as a platform to service clients with High End affordable quality Construction & project Management with solid advice & accurat...

Underpinning ranges from £17,284 (HAM & PEARCE CONSTRUCTION LTD based in PL23) to £17,708 (Burton Construction based in PL31), 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 Lostwithiel by posting a job with HaMuch and we will send it to extension builders in Lostwithiel.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near St Austell | £38 | £245 |
| Underpin A Building near Newquay | £32 | £230 |
| Underpin A Building near Truro | £31 | £206 |
| Underpin A Building near Plymouth | £30 | £230 |
| Underpin A Building near Falmouth | £33 | £220 |
| Underpin A Building near Camborne | £28 | £196 |
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 - £17,540

Two storey extension - £88,060

Build a timber frame extension - £26,040

Build a swimming pool - £81,040

Single storey extension - £55,800

Side return extension - £41,950

Install an RSJ - £2,240

Outbuilding - £10,040

Build a Mansard loft conversion - £52,040

Loft conversion - £34,125

Build a kitchen extension - £42,040

Hip to gable loft conversion - £42,040

Granny annexe - £87,040

Garden office - £10,040

Convert a Garage - £16,040

Garage - £18,540

Build a flat roof extension - £22,040

Build a dormer loft conversion - £42,040

Concrete foundations - £6,290

Convert a bungalow loft - £29,040

Convert a basement - £37,950