From £17,684
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Sawbridgeworth. No obligation free q...
From £18,060
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £17,812
skilled worker who specializes in completing a wide range of building and renovation projects
From £17,388
Member since April 2025
Trusted and professional extension builder in Sawbridgeworth. Experienced in all extension buildering work and keeping within budget and on quote. ...
From £17,468
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Sawbridgeworth. We offer a competitive rate to complete all your ex...
From £17,532
Relax... you have found a reliable extension builder in Sawbridgeworth. Major Building Contractors Ltd is a friendly and reliable company based in ...
From £17,684
Need to find an Extension Builder near you for all your extension buildering work?
Sz Builders provides a local, trusted extension builderi...
From £18,212
Experienced extension builder ready to quote for your work. Render is the best extension builder in Sawbridgeworth. No obligation free quotes and m...
From £17,396
Experienced extension builder ready to quote for your work. Jhon is the best extension builder in Sawbridgeworth. No obligation free quotes and man...
From £17,380
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £17,380 (Can design and Construction based in Ig11) to £18,212 (Render based in IG1), 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 Sawbridgeworth by posting a job with HaMuch and we will send it to extension builders in Sawbridgeworth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Harlow | £43 | £288 |
| Underpin A Building near Bishop's Stortford | £42 | £264 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Hoddesdon | £46 | £296 |
| Underpin A Building near East Hertfordshire | £44 | £289 |
| Underpin A Building near Hertford | £46 | £289 |
| Underpin A Building near Cheshunt | £48 | £285 |
| Underpin A Building near Epping Forest | £44 | £273 |
| Underpin A Building near Loughton | £44 | £273 |
| Underpin A Building near Welwyn Garden City | £42 | £268 |
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 - £17,662

Two storey extension - £88,242

Build a timber frame extension - £26,162

Build a swimming pool - £81,162

Single storey extension - £58,232

Side return extension - £43,318

Install an RSJ - £2,362

Outbuilding - £10,162

Build a Mansard loft conversion - £52,162

Loft conversion - £35,265

Build a kitchen extension - £42,162

Hip to gable loft conversion - £42,162

Granny annexe - £87,162

Garden office - £10,162

Convert a Garage - £16,162

Garage - £18,662

Build a flat roof extension - £22,162

Build a dormer loft conversion - £42,162

Concrete foundations - £6,412

Convert a bungalow loft - £29,162

Convert a basement - £39,318