Robert Mason
Relax... you have found a reliable extension builder in MK40. Bench Mark Construction is a friendly and reliable company based in MK40 who consider...
RS Plumbing and Heating is a trusted extension builder serving customers in MK40 and the surrounding area. Contact us to today to get a competitive...
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?
A M Interiors provides a local, trusted extension builde...
Kestutis Palaitis
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in MK40? Custom Construction (UK) Ltd has been helping local clients (20 mile radius) with their extension buildering job...
Experienced extension builder ready to quote for your work. Cousins Builders Ltd is the best extension builder in MK40. No obligation free quotes a...
From £86,888
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,200
Relax... you have found a reliable extension builder in MK40. R G BUILDERS UK LTD is a friendly and reliable company based in MK40 who consider no ...
From £87,304
Our building services company MH Building have a combined thirty-five years of experience and have been helping customers in Bedfordshire and the s...

Building a granny annexe ranges from £86,880 (Cousins Builders Ltd based in MK43) to £88,024 (J K L Building Contractors Ltd based in MK42), 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 MK40 by posting a job with HaMuch. We will send it to extension builders in MK40 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near South Bedfordshire | £45 | £278 |
| Granny Annexe near Bedford | £45 | £278 |
| Granny Annexe near Kempston | £44 | £273 |
| Granny Annexe near Ampthill | £38 | £258 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Biggleswade | £41 | £268 |
| Granny Annexe near St Neots | £51 | £318 |
| Granny Annexe near Rushden | £34 | £231 |
| Granny Annexe near Milton Keynes | £39 | £263 |
| Granny Annexe near Bletchley | £39 | £265 |
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 - £17,833

Two storey extension - £88,499

Build a timber frame extension - £26,333

Build a swimming pool - £81,333

Single storey extension - £61,656

Side return extension - £45,244

Install an RSJ - £2,533

Outbuilding - £10,333

Build a Mansard loft conversion - £52,333

Loft conversion - £36,870

Build a kitchen extension - £42,333

Hip to gable loft conversion - £42,333

Granny annexe - £87,333

Garden office - £10,333

Convert a Garage - £16,333

Garage - £18,833

Build a flat roof extension - £22,333

Build a dormer loft conversion - £42,333

Concrete foundations - £6,583

Convert a bungalow loft - £29,333

Convert a basement - £41,244