From £87,432
Experienced extension builder ready to quote for your work. SWANEY CONSTRUCTION LTD is the best extension builder in MK45. No obligation free quote...
From £87,568
We strive for quality for our clients. With over 37 years experience in the building industry we can offer a full service for our clients including...
From £87,272
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,552
Blue Conker are dedicated to creating spaces for you to enjoy living. From the planning stages through to the finishing touches, our team of profes...
From £87,240
G/WORKS & GENERAL BUILDING is an established extension buildering business in MK45. We come highly recommended and provide competitive quotes for y...
From £87,328
Our building services company David Douglas Developments has over 30 years’ experience, and built an established reputation of providing customer...
From £86,624
Trusted and professional extension builder in MK45. Experienced in all extension buildering work and keeping within budget and on quote. K FREEMAN ...
From £87,280
Trusted and professional extension builder in MK45. Experienced in all extension buildering work and keeping within budget and on quote. JHF Constr...
From £86,880
Experienced extension builder ready to quote for your work. Cousins Builders Ltd is the best extension builder in MK45. No obligation free quotes a...
From £86,848
Need an Extension Builder in MK45? R&J Building Services Ltd has been helping local clients (20 mile radius) with their extension buildering jobs f...

Building a granny annexe ranges from £86,624 (K FREEMAN BUILDERS LIMITED based in MK43) to £87,568 (O & E Developments Ld based in MK45), 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 MK45 by posting a job with HaMuch. We will send it to extension builders in MK45 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Ampthill | £38 | £258 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Kempston | £44 | £273 |
| Granny Annexe near South Bedfordshire | £45 | £278 |
| Granny Annexe near Bedford | £45 | £278 |
| Granny Annexe near Biggleswade | £41 | £268 |
| Granny Annexe near Luton | £42 | £276 |
| Granny Annexe near Dunstable | £41 | £270 |
| Granny Annexe near Letchworth | £44 | £283 |
| 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 - £17,702

Two storey extension - £88,304

Build a timber frame extension - £26,202

Build a swimming pool - £81,202

Single storey extension - £59,048

Side return extension - £43,777

Install an RSJ - £2,402

Outbuilding - £10,202

Build a Mansard loft conversion - £52,202

Loft conversion - £35,648

Build a kitchen extension - £42,202

Hip to gable loft conversion - £42,202

Granny annexe - £87,202

Garden office - £10,202

Convert a Garage - £16,202

Garage - £18,702

Build a flat roof extension - £22,202

Build a dormer loft conversion - £42,202

Concrete foundations - £6,452

Convert a bungalow loft - £29,202

Convert a basement - £39,777