From £10,040
Trusted and professional extension builder in MK5. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bui...
From £10,392
Need an Extension Builder in MK5? STARGRADE CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £10,152
Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
From £10,496
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
From £9,848
Need an Extension Builder in MK5? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £10,088
Need to find an Extension Builder near you for all your extension buildering work?
Go-Large Design & Build Ltd provides a local, trusted ex...
From £10,224
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,272
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
From £9,952
Relax... you have found a reliable extension builder in MK5. Dean Prichard Building Services is a friendly and reliable company based in MK5 who co...
From £10,240
I am a British Gas trained engineer with a vast knowledge of all gas, central heating, and plumbing systems. Now working independently, I provide i...

Garden offices range from the cheapest of £9,848 (Highland Homes & Gardens based in MK4) to the dearest of £10,496 (JAB based in MK4), 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 MK5 by posting a job with HaMuch. We'll send it to extension builders in MK5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Milton Keynes | £39 | £263 |
| Garden Office near Bletchley | £39 | £265 |
| Garden Office near Leighton Buzzard | £38 | £270 |
| Garden Office near Aylesbury Vale | £36 | £246 |
| Garden Office near Ampthill | £38 | £258 |
| Garden Office near Mid Bedfordshire | £42 | £276 |
| Garden Office near Aylesbury | £42 | £270 |
| Garden Office near Dunstable | £41 | £270 |
| Garden Office near Kempston | £44 | £273 |
| Garden Office near South Bedfordshire | £45 | £278 |
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 - £17,670

Two storey extension - £88,256

Build a timber frame extension - £26,170

Build a swimming pool - £81,170

Single storey extension - £58,408

Side return extension - £43,417

Install an RSJ - £2,370

Outbuilding - £10,170

Build a Mansard loft conversion - £52,170

Loft conversion - £35,348

Build a kitchen extension - £42,170

Hip to gable loft conversion - £42,170

Granny annexe - £87,170

Garden office - £10,170

Convert a Garage - £16,170

Garage - £18,670

Build a flat roof extension - £22,170

Build a dormer loft conversion - £42,170

Concrete foundations - £6,420

Convert a bungalow loft - £29,170

Convert a basement - £39,417