From £16,996
Trusted and professional extension builder in Portglenone. Experienced in all work and keeping within budget and on quote. purdy build have many h...
From £16,932
We have over 25 years experience in all building work and renowned for good workmanship All jobs small and large taken on
From £17,108
Need an Extension Builder in Portglenone? SF Carpentry has been helping local clients (20 mile radius) with their jobs for many years. Get a quote...
From £16,476
Have worked in building industry for over 30 years contracts from government to private sector.

Underpinning ranges from £16,476 (Anak based in BT40) to £17,108 (SF Carpentry based in BT51), 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 Portglenone by posting a job with HaMuch and we will send it to extension builders in Portglenone.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Ballymoney | £18 | £163 |
| Underpin A Building near Coleraine | £21 | £181 |
| Underpin A Building near Ballyclare | £17 | £110 |
| Underpin A Building near Larne | £15 | £120 |
| Underpin A Building near Magherafelt | £25 | £200 |
| Underpin A Building near Crumlin | £22 | £168 |
| Underpin A Building near Dungiven | £21 | £179 |
| Underpin A Building near Carrickfergus | £21 | £145 |
| Underpin A Building near Greenisland | £20 | £134 |
| Underpin A Building near Holywood | £20 | £138 |
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 - £16,878

Two storey extension - £87,067

Build a timber frame extension - £25,378

Build a swimming pool - £80,378

Single storey extension - £42,560

Side return extension - £34,503

Install an RSJ - £1,578

Outbuilding - £9,378

Build a Mansard loft conversion - £51,378

Loft conversion - £27,919

Build a kitchen extension - £41,378

Hip to gable loft conversion - £41,378

Granny annexe - £86,378

Garden office - £9,378

Convert a Garage - £15,378

Garage - £17,878

Build a flat roof extension - £21,378

Build a dormer loft conversion - £41,378

Concrete foundations - £5,628

Convert a bungalow loft - £28,378

Convert a basement - £30,503