From £6,810
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £7,834
Propello is an established and experienced local extension builder in Knebworth. Please contact us for a free, no obligation quote and competitive...
From £6,674
Sharp Building Ltd is an established and experienced local extension builder in Knebworth. Please contact us for a free, no obligation quote and co...
From £6,170
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £6,482
If you are looking for a Knebworth extension builder and you need something replaced, fitted, or fixed, contact Space Above Limited today. We are c...
From £6,674
Nouvell Decor is a trusted extension builder serving customers in Knebworth and the surrounding area. Contact us to today to get a competitive quot...
From £6,682
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £6,362
JJSR Construction Ltd is an established and experienced local extension builder in Knebworth. Please contact us for a free, no obligation quote and...
From £6,250
Member since July 2020
EB Construction & Building Ltd are here to help customers who need an Extension Builder in Knebworth. We offer a competitive rate to complete all y...
From £6,594
Trusted and professional extension builder in Knebworth. Experienced in all extension buildering work and keeping within budget and on quote. Peter...

Concrete foundations range from the £6,170 (Nisup Building Services based in HA8) to £7,834 (Propello based in E17) in Knebworth.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Knebworth by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
"We are small builders looking quote for foundations ,groundworks and drainage - soakways Thanks Harsha.R" - AL8, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Concrete Foundations near Stevenage | £44 | £282 |
| Concrete Foundations near Welwyn Garden City | £42 | £268 |
| Concrete Foundations near Hertford | £46 | £289 |
| Concrete Foundations near Hitchin | £43 | £283 |
| Concrete Foundations near East Hertfordshire | £44 | £289 |
| Concrete Foundations near North Hertfordshire | £44 | £283 |
| Concrete Foundations near Hatfield | £64 | £283 |
| Concrete Foundations near Ware | £47 | £296 |
| Concrete Foundations near Harpenden | £86 | £315 |
| Concrete Foundations near Letchworth | £44 | £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 - £17,903

Two storey extension - £88,605

Build a timber frame extension - £26,403

Build a swimming pool - £81,403

Single storey extension - £63,064

Side return extension - £46,036

Install an RSJ - £2,603

Outbuilding - £10,403

Build a Mansard loft conversion - £52,403

Loft conversion - £37,530

Build a kitchen extension - £42,403

Hip to gable loft conversion - £42,403

Granny annexe - £87,403

Garden office - £10,403

Convert a Garage - £16,403

Garage - £18,903

Build a flat roof extension - £22,403

Build a dormer loft conversion - £42,403

Concrete foundations - £6,653

Convert a bungalow loft - £29,403

Convert a basement - £42,036