From £17,444
Relax... you have found a reliable extension builder in Dacorum. Ellis Construction is a friendly and reliable company based in Dacorum who conside...
From £17,580
BOXMOOR BLDG & CARP SERVICES is a trusted extension builder serving customers in Dacorum and the surrounding area. Contact us to today to get a com...
From £17,868
I GIBBS BUILDING SERVICES is an established extension buildering business in Dacorum. We come highly recommended and provide competitive quotes for...
From £17,860
Need an Extension Builder in Dacorum? MW The Building Specialists Ltd has been helping local clients (20 mile radius) with their extension builderi...
From £17,652
JH Refurbishments are here to help customers who need an Extension Builder in Dacorum. We offer a competitive rate to complete all your extension b...
From £17,724
Grand Developments and Construction Ltd are here to help customers who need an Extension Builder in Dacorum. We offer a competitive rate to complet...
From £17,540
BARRETT LESLIE BUILDING are here to help customers who need an Extension Builder in Dacorum. We offer a competitive rate to complete all your exten...
From £15,604
Hertfordshire brickwork is the realisation of quality and great customer service at its very best i myself the director of Hertfordshire bric...
From £17,636
Experienced extension builder ready to quote for your work. Building & Renovation Services Zdzislaw Zalewski is the best extension builder in Dacor...
From £17,956
Need an Extension Builder in Dacorum? COWMAN CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for ...

Underpinning ranges from £15,604 (Hertfordshire brickwork based in Hp1) to £17,956 (COWMAN CONSTRUCTION based in HP4), 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 Dacorum by posting a job with HaMuch and we will send it to extension builders in Dacorum.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Dacorum | £42 | £269 |
| Underpin A Building near Hemel Hempstead | £42 | £270 |
| Underpin A Building near Berkhamsted | £41 | £263 |
| Underpin A Building near Chesham | £42 | £277 |
| Underpin A Building near St Albans | £63 | £288 |
| Underpin A Building near Rickmansworth | £42 | £278 |
| Underpin A Building near Harpenden | £86 | £315 |
| Underpin A Building near Watford | £43 | £278 |
| Underpin A Building near Bushey | £42 | £276 |
| Underpin A Building near Dunstable | £41 | £270 |
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 - £17,486

Two storey extension - £87,980

Build a timber frame extension - £25,986

Build a swimming pool - £80,986

Single storey extension - £54,728

Side return extension - £41,347

Install an RSJ - £2,186

Outbuilding - £9,986

Build a Mansard loft conversion - £51,986

Loft conversion - £33,623

Build a kitchen extension - £41,986

Hip to gable loft conversion - £41,986

Granny annexe - £86,986

Garden office - £9,986

Convert a Garage - £15,986

Garage - £18,486

Build a flat roof extension - £21,986

Build a dormer loft conversion - £41,986

Concrete foundations - £6,236

Convert a bungalow loft - £28,986

Convert a basement - £37,347