From £17,532
Monarch Builders South East Ltd is an established and experienced local extension builder in Thanet. Please contact us for a free, no obligation qu...
From £17,004
Christian Builders Margate Ltd is an established and experienced local extension builder in Thanet. Please contact us for a free, no obligation quo...
From £17,324
Christian Builders Margate Ltd is a multi-service company founded by Nick Christian. We operate with a highly skilled team of designers, tradesmen,...
From £17,132
GDB CONSTRUCTION is a trusted extension builder serving customers in Thanet and the surrounding area. Contact us to today to get a competitive quot...
From £16,812
All building work , all hoyse maintenance. House extension and refurbishment works.
From £17,100
Relax... you have found a reliable extension builder in Thanet. Paragon Stone Design is a friendly and reliable company based in Thanet who conside...
From £17,428
Teekay solutions Limited is an established and experienced local extension builder in Thanet. Please contact us for a free, no obligation quote and...
From £16,940
We been for almost 15 years in the building trade,
we are easy going and willing to work with our client and to archive the best r...
From £17,244
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke building projects provides a local, trusted exte...
From £17,132
Design – our highly experienced design team can help you visualise your dream outcomes, working sympathetically with your space to find the perfe...

Underpinning ranges from £16,812 (B H G M Ltd based in CT7) to £17,532 (Monarch Builders South East Ltd based in CT9), 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 Thanet by posting a job with HaMuch and we will send it to extension builders in Thanet.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Thanet | £27 | £207 |
| Underpin A Building near Margate | £27 | £208 |
| Underpin A Building near Ramsgate | £27 | £208 |
| Underpin A Building near Broadstairs | £27 | £208 |
| Underpin A Building near Herne Bay | £28 | £213 |
| Underpin A Building near Deal | £26 | £199 |
| Underpin A Building near Canterbury | £31 | £232 |
| Underpin A Building near Whitstable | £28 | £214 |
| Underpin A Building near Dover | £29 | £226 |
| Underpin A Building near Faversham | £34 | £235 |
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 - £17,165

Two storey extension - £87,497

Build a timber frame extension - £25,665

Build a swimming pool - £80,665

Single storey extension - £48,296

Side return extension - £37,729

Install an RSJ - £1,865

Outbuilding - £9,665

Build a Mansard loft conversion - £51,665

Loft conversion - £30,608

Build a kitchen extension - £41,665

Hip to gable loft conversion - £41,665

Granny annexe - £86,665

Garden office - £9,665

Convert a Garage - £15,665

Garage - £18,165

Build a flat roof extension - £21,665

Build a dormer loft conversion - £41,665

Concrete foundations - £5,915

Convert a bungalow loft - £28,665

Convert a basement - £33,729