From £17,564
We pride ourselves in offering transparent, collaborative construction services, defining your project, through planning and taking your project t...
From £17,484
Abalon is Western Canada’s leading foundation repair and basement waterproofing company, operating in the Edmonton area for over 40 years (50 yea...
From £17,524
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £17,980
Building services company Renospace was established in 2000. Since then we have been helping customers in Hertfordshire and the surrounding area by...
From £17,900
Redbourn, AL3
Bob's Home Maintenance are here to help customers who need an Extension Builder in Redbourn. We offer a competitive rate to complete all your exten...
From £17,940
IC Builders have been helping customers in St Albans and the surrounding area by providing professional, trustworthy building services.We k...
From £17,844
Trusted and professional extension builder in Redbourn. Experienced in all extension buildering work and keeping within budget and on quote. Peter'...
From £17,612
4siblings are here to help customers who need an Extension Builder in Redbourn. We offer a competitive rate to complete all your extension builderi...
From £17,820
Relax... you have found a reliable extension builder in Redbourn. Designer Shade Solutions is a friendly and reliable company based in Redbourn who...
From £17,812
Trusted and professional extension builder in Redbourn. Experienced in all extension buildering work and keeping within budget and on quote. Home B...

Underpinning ranges from £17,484 (Abalon Construction based in ZZ99) to £17,980 (RenoSpace based in AL3), 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 Redbourn by posting a job with HaMuch and we will send it to extension builders in Redbourn.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near St Albans | £63 | £288 |
| Underpin A Building near Harpenden | £86 | £315 |
| Underpin A Building near Hemel Hempstead | £42 | £270 |
| Underpin A Building near Dacorum | £42 | £269 |
| Underpin A Building near Hatfield | £64 | £283 |
| Underpin A Building near Luton | £41 | £278 |
| Underpin A Building near Welwyn Garden City | £42 | £268 |
| Underpin A Building near Berkhamsted | £41 | £263 |
| Underpin A Building near Bushey | £42 | £276 |
| 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 - £17,748

Two storey extension - £88,372

Build a timber frame extension - £26,248

Build a swimming pool - £81,248

Single storey extension - £59,960

Side return extension - £44,290

Install an RSJ - £2,448

Outbuilding - £10,248

Build a Mansard loft conversion - £52,248

Loft conversion - £36,075

Build a kitchen extension - £42,248

Hip to gable loft conversion - £42,248

Granny annexe - £87,248

Garden office - £10,248

Convert a Garage - £16,248

Garage - £18,748

Build a flat roof extension - £22,248

Build a dormer loft conversion - £42,248

Concrete foundations - £6,498

Convert a bungalow loft - £29,248

Convert a basement - £40,290