From £17,956
A.J Builders is an established and experienced local extension builder in LU4. Please contact us for a free, no obligation quote and competitive ra...
From £17,716
MARSH CONSTRUCTION (LUTON) LIM is an established extension buildering business in LU4. We come highly recommended and provide competitive quotes fo...
From £17,772
Top Notch Tradesmen is an established and experienced local extension builder in LU4. Please contact us for a free, no obligation quote and competi...
From £17,500
S Sherazi Home Improvement Service are here to help customers who need an Extension Builder in LU4. We offer a competitive rate to complete all you...
From £17,348
Di Carlo Construction LTD is a trusted extension builder serving customers in LU4 and the surrounding area. Contact us to today to get a competitiv...
From £17,844
Need to find an Extension Builder near you for all your extension buildering work?
Greg-Bud provides a local, trusted extension buildering ...
From £17,340
Smart Building Solutions are here to help customers who need an Extension Builder in LU4. We offer a competitive rate to complete all your extensio...
From £16,660
NJG glass & locks has over 25 years experience in the window and glazing industry. So don't hesitate to get a free quote
From £17,596
We use only the highest quality products, and you can rest assured knowing that we are fully certified and registered with the relevant authorities...
From £17,820
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Underpinning ranges from £16,660 (NJG Glass & Locks based in LU5) to £17,956 (A.J Builders based in LU4), 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 LU4 by posting a job with HaMuch and we will send it to extension builders in LU4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Luton | £42 | £276 |
| Underpin A Building near Dunstable | £41 | £270 |
| Underpin A Building near Mid Bedfordshire | £42 | £276 |
| Underpin A Building near Harpenden | £86 | £315 |
| Underpin A Building near Leighton Buzzard | £38 | £270 |
| Underpin A Building near Ampthill | £38 | £258 |
| Underpin A Building near Hitchin | £43 | £283 |
| Underpin A Building near Hemel Hempstead | £42 | £270 |
| Underpin A Building near Berkhamsted | £41 | £263 |
| Underpin A Building near Dacorum | £42 | £269 |
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