From £17,548
Sevenoaks, TN13
Experienced extension builder ready to quote for your work. PPC CONSTRUCTION is the best extension builder in Sevenoaks. No obligation free quotes ...
From £17,524
Sevenoaks, TN13
Built over 100 houses under nhbc can cover any eventuality
From £17,596
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,396
W HARDY BUILDERS LTD is a trusted extension builder serving customers in Sevenoaks and the surrounding area. Contact us to today to get a competiti...
From £17,668
Need an Extension Builder in Sevenoaks? Starr Installations Ltd has been helping local clients (20 mile radius) with their extension buildering job...
From £17,580
Need to find an Extension Builder near you for all your extension buildering work?
Egidos Limited provides a local, trusted extension build...
From £17,388
Sevenoaks, TN16
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,388
Relax... you have found a reliable extension builder in Sevenoaks. A C Ribbens Building & Decorating is a friendly and reliable company based in Se...
From £17,700
Whether you are planning a new home build, single or double storey house extension, additional lounge/bedroom extension we can help. Our Kent based...
From £17,764
Our building services company Accuracy Developments Ltd has over 25 years’ experience. We have been helping customers in Westerham and the surrou...

Underpinning ranges from £17,388 (MRL Construction based in TN16) to £17,764 (Accuracy Developments Ltd based in TN16), 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 Sevenoaks by posting a job with HaMuch and we will send it to extension builders in Sevenoaks.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Sevenoaks | £38 | £234 |
| Underpin A Building near Tonbridge | £38 | £254 |
| Underpin A Building near Tunbridge Wells | £37 | £258 |
| Underpin A Building near Larkfield | £41 | £253 |
| Underpin A Building near Bexley | £41 | £265 |
| Underpin A Building near Caterham | £43 | £272 |
| Underpin A Building near Bromley | £42 | £265 |
| Underpin A Building near Dartford | £51 | £273 |
| Underpin A Building near Northfleet | £41 | £261 |
| Underpin A Building near Croydon | £43 | £267 |
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 - £17,555

Two storey extension - £88,083

Build a timber frame extension - £26,055

Build a swimming pool - £81,055

Single storey extension - £56,104

Side return extension - £42,121

Install an RSJ - £2,255

Outbuilding - £10,055

Build a Mansard loft conversion - £52,055

Loft conversion - £34,268

Build a kitchen extension - £42,055

Hip to gable loft conversion - £42,055

Granny annexe - £87,055

Garden office - £10,055

Convert a Garage - £16,055

Garage - £18,555

Build a flat roof extension - £22,055

Build a dormer loft conversion - £42,055

Concrete foundations - £6,305

Convert a bungalow loft - £29,055

Convert a basement - £38,121