From £87,040
Trusted and professional extension builder in MK5. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bui...
From £87,392
Need an Extension Builder in MK5? STARGRADE CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £87,152
Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
From £87,496
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
From £86,848
Need an Extension Builder in MK5? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs for...
From £87,088
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 £87,224
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,272
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
From £86,952
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 £87,240
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...

Building a granny annexe ranges from £86,848 (Highland Homes & Gardens based in MK4) to £87,496 (JAB based in MK4), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in MK5 by posting a job with HaMuch. We will send it to extension builders in MK5 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Milton Keynes | £39 | £263 |
| Granny Annexe near Bletchley | £39 | £265 |
| Granny Annexe near Leighton Buzzard | £38 | £270 |
| Granny Annexe near Aylesbury Vale | £36 | £246 |
| Granny Annexe near Ampthill | £38 | £258 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Aylesbury | £42 | £270 |
| Granny Annexe near Dunstable | £41 | £270 |
| Granny Annexe near Kempston | £44 | £273 |
| Granny Annexe 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