Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
Need an Extension Builder in MK8? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs for...
Trusted and professional extension builder in MK8. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bui...
Relax... you have found a reliable extension builder in MK8. Dean Prichard Building Services is a friendly and reliable company based in MK8 who co...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
Need to find an Extension Builder near you for all your extension buildering work?
Go-Large Design & Build Ltd provides a local, trusted ex...
Need an Extension Builder in MK8? D Catt Builders has been helping local clients (20 mile radius) with their extension buildering jobs for many yea...
John Addis
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
From £87,416
BURCROFT BUILDERS is an established and experienced local extension builder in MK8. Please contact us for a free, no obligation quote and competiti...

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 MK8 by posting a job with HaMuch. We will send it to extension builders in MK8 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 Northampton | £35 | £239 |
| Granny Annexe near Aylesbury | £42 | £270 |
| Granny Annexe near Kempston | £44 | £273 |
| Granny Annexe near Dunstable | £41 | £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 - £17,650

Two storey extension - £88,226

Build a timber frame extension - £26,150

Build a swimming pool - £81,150

Single storey extension - £58,008

Side return extension - £43,192

Install an RSJ - £2,350

Outbuilding - £10,150

Build a Mansard loft conversion - £52,150

Loft conversion - £35,160

Build a kitchen extension - £42,150

Hip to gable loft conversion - £42,150

Granny annexe - £87,150

Garden office - £10,150

Convert a Garage - £16,150

Garage - £18,650

Build a flat roof extension - £22,150

Build a dormer loft conversion - £42,150

Concrete foundations - £6,400

Convert a bungalow loft - £29,150

Convert a basement - £39,192