From £86,704
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,704
From start to finish, your project will be undertaken by one of the family, providing the utmost care and quality of workmanship. We’ll work with...

Building a granny annexe ranges from £86,704 (Cannon and Son Ltd. based in TR6) to £86,704 (Cannon and Son Ltd. based in TR6), 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 TR5 by posting a job with HaMuch. We will send it to extension builders in TR5 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Truro | £31 | £206 |
| Granny Annexe near Camborne | £28 | £196 |
| Granny Annexe near Newquay | £32 | £230 |
| Granny Annexe near Falmouth | £33 | £220 |
| Granny Annexe near St Ives, Cornwall | £27 | £188 |
| Granny Annexe near St Austell | £38 | £245 |
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 - £17,204

Two storey extension - £87,556

Build a timber frame extension - £25,704

Build a swimming pool - £80,704

Single storey extension - £49,080

Side return extension - £38,170

Install an RSJ - £1,904

Outbuilding - £9,704

Build a Mansard loft conversion - £51,704

Loft conversion - £30,975

Build a kitchen extension - £41,704

Hip to gable loft conversion - £41,704

Granny annexe - £86,704

Garden office - £9,704

Convert a Garage - £15,704

Garage - £18,204

Build a flat roof extension - £21,704

Build a dormer loft conversion - £41,704

Concrete foundations - £5,954

Convert a bungalow loft - £28,704

Convert a basement - £34,170