We send your job to ALL Calstock extension builders
Available extension builders in Calstock reply
Select your affordable Calstock extension builder
From £87,128
Stephen Trevillion
Member since October 2026
Minor and major building works
Need an Extension Builder in Calstock? A1 CONSTRUCTION & MAINTENCE has been helping local clients (20 mile radius) with their extension buildering...
Relax... you have found a reliable extension builder in Calstock. MJR Construction SW Ltd is a friendly and reliable company based in Calstock who ...
Need to find an Extension Builder near you for all your extension buildering work?
STEVENS BUILDING & MAINT LTD provides a local, trusted e...
From £86,632
MICHAEL P PHILP is an established and experienced local extension builder in Calstock. Please contact us for a free, no obligation quote and compet...
From £87,152
360 Construction are here to help customers who need an Extension Builder in Calstock. We offer a competitive rate to complete all your extension b...
From £86,784
TJ FRIEND CONSTRUCTION are here to help customers who need an Extension Builder in Calstock. We offer a competitive rate to complete all your exten...
From £86,944
Trusted and professional extension builder in Calstock. Experienced in all extension buildering work and keeping within budget and on quote. CONSTR...
From £86,848
A Rated Builders is an established and experienced local extension builder in Calstock. Please contact us for a free, no obligation quote and compe...

Building a granny annexe ranges from £86,632 (MICHAEL P PHILP based in PL12) to £87,288 (Brian C Credicott based in PL19), 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 Calstock by posting a job with HaMuch. We will send it to extension builders in Calstock who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Plymouth | £30 | £230 |
| Granny Annexe near Teignbridge | £27 | £260 |
| Granny Annexe near Newton Abbot | £27 | £236 |
| Granny Annexe near St Austell | £38 | £245 |
| Granny Annexe near Paignton | £27 | £222 |
| Granny Annexe near Torbay | £27 | £223 |
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 - £17,422

Two storey extension - £87,884

Build a timber frame extension - £25,922

Build a swimming pool - £80,922

Single storey extension - £53,448

Side return extension - £40,627

Install an RSJ - £2,122

Outbuilding - £9,922

Build a Mansard loft conversion - £51,922

Loft conversion - £33,023

Build a kitchen extension - £41,922

Hip to gable loft conversion - £41,922

Granny annexe - £86,922

Garden office - £9,922

Convert a Garage - £15,922

Garage - £18,422

Build a flat roof extension - £21,922

Build a dormer loft conversion - £41,922

Concrete foundations - £6,172

Convert a bungalow loft - £28,922

Convert a basement - £36,627