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 Bletchley. Please contact us for a free, no obligation quote and com...
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 £87,064
Relax... you have found a reliable extension builder in Bletchley. GD RAWLINGS BUILDING is a friendly and reliable company based in Bletchley who c...
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 £86,848
Need an Extension Builder in Bletchley? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jo...
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 £87,040
Trusted and professional extension builder in Bletchley. Experienced in all extension buildering work and keeping within budget and on quote. Langt...
From £87,496
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
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 £87,496 (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 Bletchley by posting a job with HaMuch. We will send it to extension builders in Bletchley 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 Aylesbury Vale | £36 | £246 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Dunstable | £41 | £270 |
| Granny Annexe near Aylesbury | £42 | £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 - £17,655

Two storey extension - £88,233

Build a timber frame extension - £26,155

Build a swimming pool - £81,155

Single storey extension - £58,104

Side return extension - £43,246

Install an RSJ - £2,355

Outbuilding - £10,155

Build a Mansard loft conversion - £52,155

Loft conversion - £35,205

Build a kitchen extension - £42,155

Hip to gable loft conversion - £42,155

Granny annexe - £87,155

Garden office - £10,155

Convert a Garage - £16,155

Garage - £18,655

Build a flat roof extension - £22,155

Build a dormer loft conversion - £42,155

Concrete foundations - £6,405

Convert a bungalow loft - £29,155

Convert a basement - £39,246