From £87,232
If you are looking for a Thorn extension builder and you need something replaced, fitted, or fixed, contact Space Above Limited today. We are compe...
From £87,248
RS Plumbing and Heating is a trusted extension builder serving customers in Thorn and the surrounding area. Contact us to today to get a competitiv...
From £87,448
Relax... you have found a reliable extension builder in Thorn. Bench Mark Construction is a friendly and reliable company based in Thorn who consid...
From £87,808
Need to find an Extension Builder near you for all your extension buildering work?
A M Interiors provides a local, trusted extension builde...
From £87,000
Member since July 2020
EB Construction & Building Ltd are here to help customers who need an Extension Builder in Thorn. We offer a competitive rate to complete all your ...
From £87,344
Trusted and professional extension builder in Thorn. Experienced in all extension buildering work and keeping within budget and on quote. Peter's G...
From £86,936
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..
From £87,464
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £87,112
JASON SHARP SHARP BUILDERS is a trusted extension builder serving customers in Thorn and the surrounding area. Contact us to today to get a competi...
From £87,320
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Building a granny annexe ranges from £86,936 (Bacan's cleaning painting and decorating based in LU1) to £87,808 (A M Interiors 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 Thorn by posting a job with HaMuch. We will send it to extension builders in Thorn who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Dunstable | £41 | £272 |
| Granny Annexe near Luton | £41 | £278 |
| Granny Annexe near Leighton Buzzard | £38 | £270 |
| Granny Annexe near Mid Bedfordshire | £42 | £276 |
| Granny Annexe near Ampthill | £38 | £258 |
| Granny Annexe near Harpenden | £86 | £315 |
| Granny Annexe near Berkhamsted | £41 | £263 |
| Granny Annexe near Bletchley | £39 | £265 |
| Granny Annexe near Hemel Hempstead | £42 | £270 |
| Granny Annexe near Hitchin | £43 | £283 |
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 - £17,791

Two storey extension - £88,437

Build a timber frame extension - £26,291

Build a swimming pool - £81,291

Single storey extension - £60,824

Side return extension - £44,776

Install an RSJ - £2,491

Outbuilding - £10,291

Build a Mansard loft conversion - £52,291

Loft conversion - £36,480

Build a kitchen extension - £42,291

Hip to gable loft conversion - £42,291

Granny annexe - £87,291

Garden office - £10,291

Convert a Garage - £16,291

Garage - £18,791

Build a flat roof extension - £22,291

Build a dormer loft conversion - £42,291

Concrete foundations - £6,541

Convert a bungalow loft - £29,291

Convert a basement - £40,776