Anthony Withey
Trusted and professional extension builder in PO14. Experienced in all extension buildering work and keeping within budget and on quote. A W PAVING...
O NEILL CONSTRUCTION LTD is an established extension buildering business in PO14. We come highly recommended and provide competitive quotes for you...
M.K Warner Building Services is an established extension buildering business in PO14. We come highly recommended and provide competitive quotes for...
Nick Smith
NICK SMITH BUILDERS is an established extension buildering business in PO14. We come highly recommended and provide competitive quotes for your wor...
Thermic Homes is an energy-saving home improvement company operating out of the south coast of England. Our mission is to create warmer homes for t...
Relax... you have found a reliable extension builder in PO14. MA Builders is a friendly and reliable company based in PO14 who consider no job as t...
Need an Extension Builder in PO14? GRL Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £17,684
Stubbington Roofing Ltd. is an established extension buildering business in PO14. We come highly recommended and provide competitive quotes for you...
From £17,540
Wayne Roxburgh
Been in the trade for over 30 yrs and take pride in my work. Fully insured and references both trade and private available
From £17,588
Relax... you have found a reliable extension builder in PO14. BRIAN NEWLYN BUILDERS is a friendly and reliable company based in PO14 who consider n...

Underpinning ranges from £17,284 (NICK SMITH BUILDERS based in PO15) to £17,804 (Thermic Homes based in PO16), 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 PO14 by posting a job with HaMuch and we will send it to extension builders in PO14.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Fareham | £35 | £250 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Locks Heath | £33 | £240 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Hedge End | £34 | £244 |
| Underpin A Building near Ryde | £34 | £255 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Southampton | £34 | £243 |
| Underpin A Building near Horndean | £36 | £254 |
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 - £17,529

Two storey extension - £88,043

Build a timber frame extension - £26,029

Build a swimming pool - £81,029

Single storey extension - £55,576

Side return extension - £41,824

Install an RSJ - £2,229

Outbuilding - £10,029

Build a Mansard loft conversion - £52,029

Loft conversion - £34,020

Build a kitchen extension - £42,029

Hip to gable loft conversion - £42,029

Granny annexe - £87,029

Garden office - £10,029

Convert a Garage - £16,029

Garage - £18,529

Build a flat roof extension - £22,029

Build a dormer loft conversion - £42,029

Concrete foundations - £6,279

Convert a bungalow loft - £29,029

Convert a basement - £37,824