From £87,064
At Building Better Spaces we have been fitting bespoke bathrooms for ten years.We pride ourselves on being the go-to bathroom fitters for d...
From £87,416
BURCROFT BUILDERS is an established and experienced local extension builder in MK17. Please contact us for a free, no obligation quote and competit...
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 £87,064
Relax... you have found a reliable extension builder in MK17. GD RAWLINGS BUILDING is a friendly and reliable company based in MK17 who consider no...
From £86,848
Need an Extension Builder in MK17? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs fo...
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 £87,016
Trusted and professional extension builder in MK17. Experienced in all extension buildering work and keeping within budget and on quote. WOBURN BUI...
From £87,440
EXPERT BUILDING SERVICES is an established and experienced local extension builder in MK17. Please contact us for a free, no obligation quote and c...
From £87,160
We are a small friendly company who offer a wide range of electrical services to all domestic, commercial and industrial clients.We carry o...

Building a granny annexe ranges from £86,848 (Highland Homes & Gardens based in MK4) to £87,440 (EXPERT BUILDING SERVICES based in MK17), 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 MK17 by posting a job with HaMuch. We will send it to extension builders in MK17 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Bletchley | £39 | £265 |
| Granny Annexe near Milton Keynes | £39 | £263 |
| Granny Annexe near Leighton Buzzard | £38 | £270 |
| Granny Annexe near Ampthill | £38 | £258 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Dunstable | £41 | £270 |
| Granny Annexe near Aylesbury Vale | £36 | £246 |
| Granny Annexe near Aylesbury | £42 | £270 |
| Granny Annexe near Kempston | £44 | £273 |
| Granny Annexe near Bedford | £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 - £17,647

Two storey extension - £88,221

Build a timber frame extension - £26,147

Build a swimming pool - £81,147

Single storey extension - £57,944

Side return extension - £43,156

Install an RSJ - £2,347

Outbuilding - £10,147

Build a Mansard loft conversion - £52,147

Loft conversion - £35,130

Build a kitchen extension - £42,147

Hip to gable loft conversion - £42,147

Granny annexe - £87,147

Garden office - £10,147

Convert a Garage - £16,147

Garage - £18,647

Build a flat roof extension - £22,147

Build a dormer loft conversion - £42,147

Concrete foundations - £6,397

Convert a bungalow loft - £29,147

Convert a basement - £39,156