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Select your affordable Kings Lynn & West Norfolk extension builder
Keith Hill
Relax... you have found a reliable extension builder in Kings Lynn & West Norfolk. B & K BUILDING SERVICES is a friendly and reliable company based...
Trusted and professional extension builder in Kings Lynn & West Norfolk. Experienced in all extension buildering work and keeping within budget and...
From £17,996
Dean Hooks
Need an Extension Builder in Kings Lynn & West Norfolk? Nu-build Norfolk Ltd has been helping local clients (20 mile radius) with their extension b...
From £17,276
Pawsey Property Solutions Ltd are a Norfolk based construction company. Specialising in renovations, conversions and extensions. We have the resour...
From £17,508
Bespoke Norfolk Group Ltd is a trusted extension builder serving customers in Kings Lynn & West Norfolk and the surrounding area. Contact us to tod...

Underpinning ranges from £17,028 (B & K BUILDING SERVICES based in PE30) to £17,996 (Nu-build Norfolk Ltd based in PE34), 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 Kings Lynn & West Norfolk by posting a job with HaMuch and we will send it to extension builders in Kings Lynn & West Norfolk.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Kings Lynn & West Norfolk | £31 | £238 |
| Underpin A Building near King's Lynn | £33 | £254 |
| Underpin A Building near Wisbech | £34 | £255 |
| Underpin A Building near Dereham | £25 | £203 |
| Underpin A Building near Breckland | £28 | £248 |
| Underpin A Building near Boston | £28 | £262 |
| Underpin A Building near Spalding | £32 | £238 |
| Underpin A Building near Thetford | £42 | £277 |
| Underpin A Building near Ely | £40 | £279 |
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 - £17,406

Two storey extension - £87,858

Build a timber frame extension - £25,906

Build a swimming pool - £80,906

Single storey extension - £53,112

Side return extension - £40,438

Install an RSJ - £2,106

Outbuilding - £9,906

Build a Mansard loft conversion - £51,906

Loft conversion - £32,865

Build a kitchen extension - £41,906

Hip to gable loft conversion - £41,906

Granny annexe - £86,906

Garden office - £9,906

Convert a Garage - £15,906

Garage - £18,406

Build a flat roof extension - £21,906

Build a dormer loft conversion - £41,906

Concrete foundations - £6,156

Convert a bungalow loft - £28,906

Convert a basement - £36,438