From £10,280
Trusted and professional extension builder in HP18. Experienced in all extension buildering work and keeping within budget and on quote. BUILDRIGHT...
From £10,128
Relax... you have found a reliable extension builder in HP18. Trew Builders is a friendly and reliable company based in HP18 who consider no job as...
From £10,168
Platinum Build Ltd are here to help customers who need an Extension Builder in HP18. We offer a competitive rate to complete all your extension bui...
From £10,256
Thame Builders Ltd: Your Local Professional Building Experts.\n\nAt Thame Builders, we pride ourselves on being more than just a construction compa...
From £10,304
done lots of extensions and refurbishment of houses from 2004-2012 in london from 2012 till now in oxfordshire area.
From £10,448
Trusted and professional extension builder in HP18. Experienced in all extension buildering work and keeping within budget and on quote. C HORWOOD ...
From £10,240
AMG Roofing (Bucks) Ltd is owned by Ashley Gibson, a small, friendly, family run business that began in 2020, as a result of the Pandemic and an ac...
From £10,160
D M B E BUILDPLUS is an established and experienced local extension builder in HP18. Please contact us for a free, no obligation quote and competit...
From £10,080
We are ADC Landscaping & Gardening, owned and run by Ashley Collier. We are a family business based in Aylesbury, Buckinghamshire, and cover all as...

Garden offices range from the cheapest of £10,080 (ADC Landscape And Garden Maintenance Contractors based in HP21) to the dearest of £10,448 (C HORWOOD CONSTRUCTION based in HP19), 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 HP18 by posting a job with HaMuch. We'll send it to extension builders in HP18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Aylesbury Vale | £36 | £246 |
| Garden Office near Aylesbury | £42 | £270 |
| Garden Office near Bicester | £35 | £249 |
| Garden Office near Cherwell | £35 | £249 |
| Garden Office near Oxford | £37 | £265 |
| Garden Office near South Oxfordshire | £36 | £253 |
| Garden Office near Wycombe | £39 | £271 |
| Garden Office near Leighton Buzzard | £38 | £270 |
| Garden Office near High Wycombe | £39 | £272 |
| Garden Office near Hazlemere | £40 | £272 |
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 - £17,718

Two storey extension - £88,328

Build a timber frame extension - £26,218

Build a swimming pool - £81,218

Single storey extension - £59,368

Side return extension - £43,957

Install an RSJ - £2,418

Outbuilding - £10,218

Build a Mansard loft conversion - £52,218

Loft conversion - £35,798

Build a kitchen extension - £42,218

Hip to gable loft conversion - £42,218

Granny annexe - £87,218

Garden office - £10,218

Convert a Garage - £16,218

Garage - £18,718

Build a flat roof extension - £22,218

Build a dormer loft conversion - £42,218

Concrete foundations - £6,468

Convert a bungalow loft - £29,218

Convert a basement - £39,957