From £17,812
Relax... you have found a reliable extension builder in PO7. MC Architectural Design is a friendly and reliable company based in PO7 who consider n...
From £17,260
Maw Carpentry Services are here to help customers who need an Extension Builder in PO7. We offer a competitive rate to complete all your extension ...
From £17,604
As a family owned limited company of over 40 years, our focus on quality and service has seen our business thrive and grow, solely through recommen...
From £17,252
we're Specialists in the following
•roofing
•brickwork
•Repointing
...From £17,628
Relax... you have found a reliable extension builder in PO7. SLG Mills Building Services is a friendly and reliable company based in PO7 who consid...
From £17,396
With over 40 years of experience ARC Property Maintenance & Home Improvements Ltd has been providing a full range of structural repairs and buildin...
From £19,004
Need to find an Extension Builder near you for all your extension buildering work?
KC Fencing Ltd provides a local, trusted extension buil...
From £16,684
Need to find an Extension Builder near you for all your extension buildering work?
M G Home Improvements provides a local, trusted extensio...
From £17,364
Need an Extension Builder in PO7? CONSTRACT CONSTRUCTION SRVS LT has been helping local clients (20 mile radius) with their extension buildering jo...
From £16,324
Fifty years experience. Multi-trades, Electrical (C&G), Plumbing, Small building works, Maintenance & repair etc. NICEIC, ECA, Guild Master Cra...

Underpinning ranges from £16,324 (Jones Facilities & Maintenance Services based in PO6) to £19,004 (KC Fencing Ltd based in po9), 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 PO7 by posting a job with HaMuch and we will send it to extension builders in PO7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Waterlooville | £31 | £213 |
| Underpin A Building near Horndean | £30 | £213 |
| Underpin A Building near Havant | £30 | £213 |
| Underpin A Building near Havant & Waterloo | £30 | £213 |
| Underpin A Building near Portsmouth | £31 | £216 |
| Underpin A Building near Fareham | £31 | £217 |
| Underpin A Building near Gosport | £30 | £215 |
| Underpin A Building near Lee-on-the-Solent | £31 | £217 |
| Underpin A Building near Locks Heath | £30 | £213 |
| Underpin A Building near Chichester | £31 | £216 |
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 - £17,433

Two storey extension - £87,899

Build a timber frame extension - £25,933

Build a swimming pool - £80,933

Single storey extension - £53,656

Side return extension - £40,744

Install an RSJ - £2,133

Outbuilding - £9,933

Build a Mansard loft conversion - £51,933

Loft conversion - £33,120

Build a kitchen extension - £41,933

Hip to gable loft conversion - £41,933

Granny annexe - £86,933

Garden office - £9,933

Convert a Garage - £15,933

Garage - £18,433

Build a flat roof extension - £21,933

Build a dormer loft conversion - £41,933

Concrete foundations - £6,183

Convert a bungalow loft - £28,933

Convert a basement - £36,744