From £17,132
Londonderry, BT47
Taggart Homes - The Designer Builder are here to help customers who need an Extension Builder in Londonderry. We offer a competitive rate to comple...
From £17,196
Londonderry, BT47
Relax... you have found a reliable extension builder in Londonderry. JAMSE CONSTRUCTION LTD is a friendly and reliable company based in Londonderry...
From £17,284
Relax... you have found a reliable extension builder in Londonderry. Tyrone Turbos is a friendly and reliable company based in Londonderry who cons...
From £17,020
Londonderry, BT47
Luxury Garden Studios is an established and experienced local extension builder in Londonderry. Please contact us for a free, no obligation quote a...
From £17,108
Londonderry, BT51
Need an Extension Builder in Londonderry? SF Carpentry has been helping local clients (20 mile radius) with their extension buildering jobs for man...

Underpinning ranges from £17,020 (Luxury Garden Studios based in BT47) to £17,284 (Tyrone Turbos based in BT82), 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 Londonderry by posting a job with HaMuch and we will send it to extension builders in Londonderry.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Londonderry | £24 | £190 |
| Underpin A Building near Strathfoyle | £24 | £190 |
| Underpin A Building near Newbuildings | £24 | £190 |
| Underpin A Building near Dungiven | £22 | £190 |
| Underpin A Building near Strabane | £27 | £223 |
| Underpin A Building near Coleraine | £23 | £201 |
| Underpin A Building near Magherafelt | £30 | £238 |
| Underpin A Building near Ballymoney | £21 | £187 |
| Underpin A Building near Coalisland | £27 | £223 |
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 - £17,148

Two storey extension - £87,472

Build a timber frame extension - £25,648

Build a swimming pool - £80,648

Single storey extension - £47,960

Side return extension - £37,540

Install an RSJ - £1,848

Outbuilding - £9,648

Build a Mansard loft conversion - £51,648

Loft conversion - £30,450

Build a kitchen extension - £41,648

Hip to gable loft conversion - £41,648

Granny annexe - £86,648

Garden office - £9,648

Convert a Garage - £15,648

Garage - £18,148

Build a flat roof extension - £21,648

Build a dormer loft conversion - £41,648

Concrete foundations - £5,898

Convert a bungalow loft - £28,648

Convert a basement - £33,540