Robuild - Waterwise is an established extension buildering business in Sefton. We come highly recommended and provide competitive quotes for your w...
Need to find an Extension Builder near you for all your extension buildering work?
S.L.P Property Maintenance provides a local, trusted ext...
Trusted and professional extension builder in Sefton. Experienced in all extension buildering work and keeping within budget and on quote. DW Brick...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
BTC Bernstef Ltd is an established extension buildering business in Sefton. We come highly recommended and provide competitive quotes for your work...
J.M.C Building Services is a trusted extension builder serving customers in Sefton and the surrounding area. Contact us to today to get a competiti...
Need an Extension Builder in Sefton? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
Thomas Healey
Need an Extension Builder in Sefton? T&T Building Contractors has been helping local clients (20 mile radius) with their extension buildering jobs ...
Peter Gallagher
Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in Sefton. No obligation free quo...
CJ Construction are here to help customers who need an Extension Builder in Sefton. We offer a competitive rate to complete all your extension buil...

Garden offices range from the cheapest of £9,576 (BTC Bernstef Ltd based in L23) to the dearest of £9,952 (DW Brickwork based in CH46), 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 Sefton by posting a job with HaMuch. We'll send it to extension builders in Sefton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Sefton | £35 | £234 |
| Garden Office near Crosby | £35 | £234 |
| Garden Office near Formby | £28 | £206 |
| Garden Office near Bootle | £33 | £228 |
| Garden Office near Maghull | £34 | £231 |
| Garden Office near Wallasey | £32 | £224 |
| Garden Office near Kirkby | £31 | £224 |
| Garden Office near Liverpool | £31 | £222 |
| Garden Office near Ormskirk | £29 | £206 |
| Garden Office near Birkenhead | £31 | £219 |
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 - £17,286

Two storey extension - £87,678

Build a timber frame extension - £25,786

Build a swimming pool - £80,786

Single storey extension - £50,712

Side return extension - £39,088

Install an RSJ - £1,986

Outbuilding - £9,786

Build a Mansard loft conversion - £51,786

Loft conversion - £31,740

Build a kitchen extension - £41,786

Hip to gable loft conversion - £41,786

Granny annexe - £86,786

Garden office - £9,786

Convert a Garage - £15,786

Garage - £18,286

Build a flat roof extension - £21,786

Build a dormer loft conversion - £41,786

Concrete foundations - £6,036

Convert a bungalow loft - £28,786

Convert a basement - £35,088