From £17,780
Member since August 2026
Relax... you have found a reliable extension builder in Calcot Row. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in Calco...
From £17,796
Pinnacle Property Services is a trusted extension builder serving customers in Calcot Row and the surrounding area. Contact us to today to get a co...
From £17,836
Aerea is a trusted extension builder serving customers in Calcot Row and the surrounding area. Contact us to today to get a competitive quote for e...
From £17,652
Experienced extension builder ready to quote for your work. ADW Roofing Services is the best extension builder in Calcot Row. No obligation free qu...
From £17,428
Holt Builders Ltd are here to help customers who need an Extension Builder in Calcot Row. We offer a competitive rate to complete all your extensio...
From £17,884
M B Building & Construction Ltd is a trusted extension builder serving customers in Calcot Row and the surrounding area. Contact us to today to get...
From £17,564
Need to find an Extension Builder near you for all your extension buildering work?
MPE Brickwork provides a local, trusted extension builde...
From £17,724
Ayling & Sons Roofing Ltd is an established and experienced local extension builder in Calcot Row. Please contact us for a free, no obligation quot...
From £17,900
The Roof Doctor is an established and experienced local extension builder in Calcot Row. Please contact us for a free, no obligation quote and comp...

Underpinning ranges from £17,428 (Holt Builders Ltd based in GU12) to £17,900 (WINDOW WIZE based in Gu47), 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 Calcot Row by posting a job with HaMuch and we will send it to extension builders in Calcot Row.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Reading | £42 | £266 |
| Underpin A Building near Caversham | £38 | £265 |
| Underpin A Building near Woodley | £42 | £266 |
| Underpin A Building near Wokingham | £41 | £280 |
| Underpin A Building near Thatcham | £38 | £266 |
| Underpin A Building near Basingstoke & Deane | £39 | £273 |
| Underpin A Building near South Oxfordshire | £36 | £253 |
| Underpin A Building near Bracknell Forest | £41 | £287 |
| Underpin A Building near Newbury | £37 | £262 |
| Underpin A Building near Bracknell | £41 | £286 |
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 - £17,746

Two storey extension - £88,370

Build a timber frame extension - £26,246

Build a swimming pool - £81,246

Single storey extension - £59,928

Side return extension - £44,272

Install an RSJ - £2,446

Outbuilding - £10,246

Build a Mansard loft conversion - £52,246

Loft conversion - £36,060

Build a kitchen extension - £42,246

Hip to gable loft conversion - £42,246

Granny annexe - £87,246

Garden office - £10,246

Convert a Garage - £16,246

Garage - £18,746

Build a flat roof extension - £22,246

Build a dormer loft conversion - £42,246

Concrete foundations - £6,496

Convert a bungalow loft - £29,246

Convert a basement - £40,272