From £17,852
Distinct Build Ltd. has been built purely on referrals. We care about our client's ideas and needs and work tirelessly to deliver their dreams.
...From £17,676
Beech is an established and experienced local extension builder in Winchmore Hill. Please contact us for a free, no obligation quote and competitiv...
From £17,844
Be Illuminated are here to help customers who need an Extension Builder in Winchmore Hill. We offer a competitive rate to complete all your extensi...
From £17,708
Relax... you have found a reliable extension builder in Winchmore Hill. M P TIMLIN (CONSTRUCTION) LTD is a friendly and reliable company based in W...
From £17,652
Hamilton Refurbishments is an established and experienced local extension builder in Winchmore Hill. Please contact us for a free, no obligation qu...
From £17,836
Relax... you have found a reliable extension builder in Winchmore Hill. J MCNAMEE J & J BUILDERS is a friendly and reliable company based in Winchm...
From £17,756
Need an Extension Builder in Winchmore Hill? Mitre Peak Lofts Ltd has been helping local clients (10 mile radius) with their extension buildering j...
From £17,716
We are passionate about building bespoke homes using quality products that create unique features both internally and externally.
From £17,788
Welcome to Velonia interiors Ltd my name is James Martin and I’m the director myself and my team have many years experience I will use subcontrac...
From £17,892
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,652 (Hamilton Refurbishments based in WD3) to £17,892 (Jesson ladscaping and construction based in hp15), 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 Winchmore Hill by posting a job with HaMuch and we will send it to extension builders in Winchmore Hill.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near Hazlemere | £40 | £272 |
| Underpin A Building near Gerrards Cross | £43 | £282 |
| Underpin A Building near Rickmansworth | £42 | £278 |
| Underpin A Building near Berkhamsted | £41 | £263 |
| Underpin A Building near Dacorum | £42 | £269 |
| Underpin A Building near High Wycombe | £39 | £272 |
| Underpin A Building near Hemel Hempstead | £42 | £270 |
| Underpin A Building near Wycombe | £39 | £271 |
| Underpin A Building near Watford | £43 | £278 |
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 - £17,772

Two storey extension - £88,408

Build a timber frame extension - £26,272

Build a swimming pool - £81,272

Single storey extension - £60,440

Side return extension - £44,560

Install an RSJ - £2,472

Outbuilding - £10,272

Build a Mansard loft conversion - £52,272

Loft conversion - £36,300

Build a kitchen extension - £42,272

Hip to gable loft conversion - £42,272

Granny annexe - £87,272

Garden office - £10,272

Convert a Garage - £16,272

Garage - £18,772

Build a flat roof extension - £22,272

Build a dormer loft conversion - £42,272

Concrete foundations - £6,522

Convert a bungalow loft - £29,272

Convert a basement - £40,560