Build additional living space on your property in Calstock

A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in Calstock? To see prices and availability for your job click green button.

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From £87,128

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Trevillion Property Services Ltd

Stephen Trevillion

Member since October 2026

Minor and major building works

From £87,288

Last active Aug 26
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Brian C Credicott

Brian Credicott

Forty years of experience in our local community 

From £86,824

Last active Mar 26
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A1 CONSTRUCTION & MAINTENCE

Need an Extension Builder in Calstock? A1 CONSTRUCTION & MAINTENCE has been helping local clients (20 mile radius) with their extension buildering...

From £86,664

Last active Mar 26
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MJR Construction SW Ltd

Relax... you have found a reliable extension builder in Calstock. MJR Construction SW Ltd is a friendly and reliable company based in Calstock who ...

From £86,960

Last active Jan 26
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STEVENS BUILDING & MAINT LTD

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

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MICHAEL P PHILP

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

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360 Construction

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

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TJ FRIEND CONSTRUCTION

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

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CONSTRUCTION MANAGEMENT SERVIC

Trusted and professional extension builder in Calstock. Experienced in all extension buildering work and keeping within budget and on quote. CONSTR...

From £86,848

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A Rated Builders

A Rated Builders is an established and experienced local extension builder in Calstock. Please contact us for a free, no obligation quote and compe...

Granny Annexe Cost in Calstock

Estimates for granny annexe near Calstock

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.


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily 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

Estimates for common extension builder jobs in Calstock;

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.

More extensions & conversions cost guides...