From £17,796
Relax... you have found a reliable extension builder in Borehamwood. BBC is a friendly and reliable company based in Borehamwood who consider no jo...
From £17,516
Borehamwood Hertfordshire, WD6
Our building services company Monarchy Building Services Ltd have seventeen years’ experience and have been helping customers in Borehamwood and ...
From £17,428
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,364
Hertfordshire, WD6
Ardent Home Improvements Ltd is a trusted extension builder serving customers in Borehamwood and the surrounding area. Contact us to today to get a...
From £17,756
Harris Calnan Construction is an established and experienced local extension builder in Borehamwood. Please contact us for a free, no obligation qu...
From £18,012
Borehamwood Hertfordshire, WD6
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
From £17,588
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,404
Borehamwood Hartfordshire, WD6
Very good builder Brick work block work ground fencin drive ways patios extension New building no job to small
From £17,900
Trusted and professional extension builder in Borehamwood. Experienced in all extension buildering work and keeping within budget and on quote. K&K...
From £17,452
Relax... you have found a reliable extension builder in Borehamwood. Deluxe Construction is a friendly and reliable company based in Borehamwood wh...

Underpinning ranges from £17,364 (Ardent Home Improvements Ltd based in WD6) to £18,012 (Mandala Building Services based in WD6), 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 Borehamwood by posting a job with HaMuch and we will send it to extension builders in Borehamwood.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Borehamwood | £42 | £270 |
| Underpin A Building near High Barnet | £43 | £272 |
| Underpin A Building near Bushey | £42 | £276 |
| Underpin A Building near Potters Bar | £43 | £273 |
| Underpin A Building near Brent Cross | £43 | £271 |
| Underpin A Building near Watford | £43 | £278 |
| Underpin A Building near Harrow | £43 | £270 |
| Underpin A Building near Muswell Hill | £44 | £273 |
| Underpin A Building near St Albans | £63 | £288 |
| Underpin A Building near Hatfield | £64 | £283 |
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 - £17,622

Two storey extension - £88,182

Build a timber frame extension - £26,122

Build a swimming pool - £81,122

Single storey extension - £57,432

Side return extension - £42,868

Install an RSJ - £2,322

Outbuilding - £10,122

Build a Mansard loft conversion - £52,122

Loft conversion - £34,890

Build a kitchen extension - £42,122

Hip to gable loft conversion - £42,122

Granny annexe - £87,122

Garden office - £10,122

Convert a Garage - £16,122

Garage - £18,622

Build a flat roof extension - £22,122

Build a dormer loft conversion - £42,122

Concrete foundations - £6,372

Convert a bungalow loft - £29,122

Convert a basement - £38,868