On time/ professional/ time served/trustworthy
Albert Radici
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
L T Builders is a trusted extension builder serving customers in Washington and the surrounding area. Contact us to today to get a competitive quot...
Need to find an Extension Builder near you for all your extension buildering work?
TK Builders provides a local, trusted extension builderi...
MM Building Services is an established and experienced local extension builder in Washington. Please contact us for a free, no obligation quote and...
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Washington. Please contact us for a free, no obligation quote...
Oscar Carballo
I have over 40 years experience in the field of construction. Thank you and I hope I will be of service to you.
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Building Craft Ltd is an established extension buildering business in Washington. We come highly recommended and provide competitive quotes for you...
Ian
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,540 (OCC Construction based in NE10) to £18,412 (Radici Construction North East Ltd based in DH1), 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 Washington by posting a job with HaMuch and we will send it to extension builders in Washington.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Washington | £33 | £254 |
| Underpin A Building near Sunderland | £33 | £251 |
| Underpin A Building near Chester-le-Street | £35 | £242 |
| Underpin A Building near Gateshead | £33 | £236 |
| Underpin A Building near Jarrow | £34 | £262 |
| Underpin A Building near Hebburn | £34 | £246 |
| Underpin A Building near South Tyneside | £34 | £261 |
| Underpin A Building near Newcastle Upon Tyne | £33 | £236 |
| Underpin A Building near Wallsend | £34 | £245 |
| Underpin A Building near Stanley | £34 | £242 |
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