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J.T.Construction is a trusted extension builder serving customers in St Helens and the surrounding area. Contact us to today to get a competitive q...
Fixit Cheshire is an established and experienced local extension builder in St Helens. Please contact us for a free, no obligation quote and compet...
Need to find an Extension Builder near you for all your extension buildering work?
JOHN ROSS BUILDERS LTD provides a local, trusted extensi...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in St Helens? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many...
G. Finnigan Builders is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes for yo...
Mark Robinson
Trusted and professional extension builder in St Helens. Experienced in all extension buildering work and keeping within budget and on quote. M L R...
Stephen Lowe
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in St Helens. Jc Properties is a friendly and reliable company based in St Helens who consider...
Peter Gallagher
Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in St Helens. No obligation free ...

Garden offices range from the cheapest of £9,600 (SPL Building Services based in WN3) to the dearest of £9,992 (J.T.Construction based in WA5), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in St Helens by posting a job with HaMuch. We'll send it to extension builders in St Helens.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near St Helens | £31 | £224 |
| Garden Office near Prescot | £31 | £223 |
| Garden Office near Knowsley | £31 | £222 |
| Garden Office near Newton-le-Willows | £31 | £221 |
| Garden Office near Huyton with Roby | £31 | £225 |
| Garden Office near Ashton-in-Makerfield | £30 | £220 |
| Garden Office near Widnes | £31 | £220 |
| Garden Office near Golborne | £30 | £222 |
| Garden Office near Orrell | £29 | £214 |
| Garden Office near Kirkby | £31 | £224 |
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 - £17,266

Two storey extension - £87,650

Build a timber frame extension - £25,766

Build a swimming pool - £80,766

Single storey extension - £50,328

Side return extension - £38,872

Install an RSJ - £1,966

Outbuilding - £9,766

Build a Mansard loft conversion - £51,766

Loft conversion - £31,560

Build a kitchen extension - £41,766

Hip to gable loft conversion - £41,766

Granny annexe - £86,766

Garden office - £9,766

Convert a Garage - £15,766

Garage - £18,266

Build a flat roof extension - £21,766

Build a dormer loft conversion - £41,766

Concrete foundations - £6,016

Convert a bungalow loft - £28,766

Convert a basement - £34,872