From £17,508
Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in South Hayling and the surrounding...
From £18,596
We are a Small Family run business with over 30 years experience in the building trade, Carpentry is my main trade, with NVQ Level 2.
From £17,644
We are a small family run business with over 20 years experience in brickwork, bathroom/kitchen fitting, roofing, landscaping, fencing, tiling and ...
From £17,612
, BN18
Futureways Design and Build are here to help customers who need an Extension Builder in South Hayling. We offer a competitive rate to complete all ...
From £17,252
Park Building Services Ltd is a trusted extension builder serving customers in South Hayling and the surrounding area. Contact us to today to get a...
From £17,876
Giles Dixon is an experienced Project Manager with over 30 years experience, having worked from the ground up starting in 1984 as an apprentice ele...
From £17,628
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,556
K A Griffin General Builder is an established extension buildering business in South Hayling. We come highly recommended and provide competitive qu...
From £17,268
Trusted and professional extension builder in South Hayling. Experienced in all extension buildering work and keeping within budget and on quote. P...
From £17,228
Need to find an Extension Builder near you for all your extension buildering work?
Knights Construction provides a local, trusted extension...

Underpinning ranges from £17,228 (Knights Construction based in BN18) to £18,596 (R&B Property Improvements based in PO9), 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 South Hayling by posting a job with HaMuch and we will send it to extension builders in South Hayling.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Havant & Waterloo | £35 | £248 |
| Underpin A Building near Havant | £35 | £249 |
| Underpin A Building near Portsmouth | £36 | £250 |
| Underpin A Building near Waterlooville | £36 | £250 |
| Underpin A Building near Gosport | £35 | £246 |
| Underpin A Building near Horndean | £35 | £253 |
| Underpin A Building near Chichester | £34 | £242 |
| Underpin A Building near Ryde | £34 | £255 |
| Underpin A Building near Lee-on-the-Solent | £35 | £249 |
| Underpin A Building near Fareham | £35 | £250 |
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 - £17,617

Two storey extension - £88,175

Build a timber frame extension - £26,117

Build a swimming pool - £81,117

Single storey extension - £57,336

Side return extension - £42,814

Install an RSJ - £2,317

Outbuilding - £10,117

Build a Mansard loft conversion - £52,117

Loft conversion - £34,845

Build a kitchen extension - £42,117

Hip to gable loft conversion - £42,117

Granny annexe - £87,117

Garden office - £10,117

Convert a Garage - £16,117

Garage - £18,617

Build a flat roof extension - £22,117

Build a dormer loft conversion - £42,117

Concrete foundations - £6,367

Convert a bungalow loft - £29,117

Convert a basement - £38,814