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Select your affordable AL7 extension builder
Amarjeet Gill
Architecture and Construction all in one place.
FREE DRAWINGS for all projects we build.
Buyerz Trading is an established and experienced local extension builder in AL7. Please contact us for a free, no obligation quote and competitive ...
A1 Home Care Building Maintenance are here to help customers who need an Extension Builder in AL7. We offer a competitive rate to complete all your...
Need an Extension Builder in AL7? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get...
Claudio Lutchi
Complex Construction is an established extension buildering business in AL7. We come highly recommended and provide competitive quotes for your wor...
Wiemy jak wa?n? decyzj? dla naszych Klientów jest budowa kupno czy remont domu, dlatego stawiamy na nowoczesne i ekonomiczne rozwi?zania , a ca?? ...
From £17,460
Relax... you have found a reliable extension builder in AL7. Interior Installations is a friendly and reliable company based in AL7 who consider no...
From £17,444
STYLE BUILDING SERVICES LTD are here to help customers who need an Extension Builder in AL7. We offer a competitive rate to complete all your exten...
From £17,852
Trusted and professional extension builder in AL7. Experienced in all extension buildering work and keeping within budget and on quote. J J Roofing...
From £17,500
Need to find an Extension Builder near you for all your extension buildering work?
J B R Contracts provides a local, trusted extension buil...

Underpinning ranges from £16,820 (Complex Construction based in AL7) to £17,924 (PRIMEEXPERT based in AL7), 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 AL7 by posting a job with HaMuch and we will send it to extension builders in AL7.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Welwyn Garden City | £42 | £269 |
| Underpin A Building near Hatfield | £42 | £266 |
| Underpin A Building near Hertford | £46 | £290 |
| Underpin A Building near Potters Bar | £43 | £273 |
| Underpin A Building near Harpenden | £45 | £282 |
| Underpin A Building near St Albans | £43 | £272 |
| Underpin A Building near Ware | £47 | £296 |
| Underpin A Building near Cheshunt | £48 | £285 |
| Underpin A Building near Stevenage | £44 | £282 |
| Underpin A Building near Hoddesdon | £46 | £296 |
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 - £17,519

Two storey extension - £88,029

Build a timber frame extension - £26,019

Build a swimming pool - £81,019

Single storey extension - £55,384

Side return extension - £41,716

Install an RSJ - £2,219

Outbuilding - £10,019

Build a Mansard loft conversion - £52,019

Loft conversion - £33,930

Build a kitchen extension - £42,019

Hip to gable loft conversion - £42,019

Granny annexe - £87,019

Garden office - £10,019

Convert a Garage - £16,019

Garage - £18,519

Build a flat roof extension - £22,019

Build a dormer loft conversion - £42,019

Concrete foundations - £6,269

Convert a bungalow loft - £29,019

Convert a basement - £37,716