From £87,496
Need an Extension Builder in St Helens? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many...
From £87,412
Trusted and professional extension builder in St Helens. Experienced in all extension buildering work and keeping within budget and on quote. M L R...
From £87,808
G. Finnigan Builders is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes for yo...
From £86,836
MJ Barker & Son is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes for your wo...
From £87,844
HIGHTOWN CONSTRUCTION LTD is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes f...
From £87,700
Higher End Construction Limited is an established extension buildering business in St Helens. We come highly recommended and provide competitive qu...
From £87,796
Need to find an Extension Builder near you for all your extension buildering work?
Maintenance Point provides a local, trusted extension bu...
From £87,736
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,700
Event planning interior designer new to buisness platform but have project managed a lot of my own home projects and organised events for birthdays...
From £87,508
Fixit Cheshire is an established and experienced local extension builder in St Helens. Please contact us for a free, no obligation quote and compet...

Costs range from £86,836 (MJ Barker & Son based in WA11) to £87,844 (HIGHTOWN CONSTRUCTION LTD based in L34), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near St Helens | £31 | £224 |
| Two Storey Extension near Prescot | £31 | £222 |
| Two Storey Extension near Knowsley | £31 | £221 |
| Two Storey Extension near Newton-le-Willows | £31 | £221 |
| Two Storey Extension near Huyton with Roby | £31 | £225 |
| Two Storey Extension near Ashton-in-Makerfield | £30 | £220 |
| Two Storey Extension near Widnes | £31 | £220 |
| Two Storey Extension near Golborne | £30 | £222 |
| Two Storey Extension near Orrell | £29 | £214 |
| Two Storey Extension near Kirkby | £31 | £222 |
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 - £17,222

Two storey extension - £87,584

Build a timber frame extension - £25,722

Build a swimming pool - £80,722

Single storey extension - £49,448

Side return extension - £38,377

Install an RSJ - £1,922

Outbuilding - £9,722

Build a Mansard loft conversion - £51,722

Loft conversion - £31,148

Build a kitchen extension - £41,722

Hip to gable loft conversion - £41,722

Granny annexe - £86,722

Garden office - £9,722

Convert a Garage - £15,722

Garage - £18,222

Build a flat roof extension - £21,722

Build a dormer loft conversion - £41,722

Concrete foundations - £5,972

Convert a bungalow loft - £28,722

Convert a basement - £34,377