From £86,408
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,648
Experienced extension builder ready to quote for your work. Taylor Made Projects is the best extension builder in EX31. No obligation free quotes a...
From £86,528
Need an Extension Builder in EX31? Chloe Property Design has been helping local clients (20 mile radius) with their extension buildering jobs for m...
From £86,496
Honka UK Ltd is a trusted extension builder serving customers in EX31 and the surrounding area. Contact us to today to get a competitive quote for ...
From £86,688
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 £86,408 (PJ Jewell & Son based in EX32) to £86,688 (IDEAL CONSTRUCTION based in EX31), 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 EX31 by posting a job with HaMuch. We will send it to extension builders in EX31 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Barnstaple | £25 | £196 |
| Granny Annexe near Bideford | £22 | £174 |
| Granny Annexe near Tiverton | £25 | £202 |
| Granny Annexe near Porthcawl | £33 | £252 |
| Granny Annexe near Vale of Glamorgan | £29 | £217 |
| Granny Annexe near Exeter | £27 | £221 |
| Granny Annexe near Bridgend | £32 | £200 |
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 - £17,054

Two storey extension - £87,330

Build a timber frame extension - £25,554

Build a swimming pool - £80,554

Single storey extension - £46,072

Side return extension - £36,478

Install an RSJ - £1,754

Outbuilding - £9,554

Build a Mansard loft conversion - £51,554

Loft conversion - £29,565

Build a kitchen extension - £41,554

Hip to gable loft conversion - £41,554

Granny annexe - £86,554

Garden office - £9,554

Convert a Garage - £15,554

Garage - £18,054

Build a flat roof extension - £21,554

Build a dormer loft conversion - £41,554

Concrete foundations - £5,804

Convert a bungalow loft - £28,554

Convert a basement - £32,478