Newquay, Cornwall
01872 211599

Garden Annex

Cornwall Garden Annex & Granny Annex Installation

Think External garden annex and granny annex's designed and built in Cornwall. Do you need extra space for friends or relatives? Our annex buildings can provide this for you. Each building can be custom designed, and incorporate any design features. This could be a design to fit an exact space within the garden or providing an accessible design for a disabled or elderly person. Our garden annex and granny annex buildings are not only great for occasional guests or elderly relatives but also great for an Airbnb or children struggling to get onto the property ladder. Garden annex prices start at around £15,000 and like our other garden buildings can have full design input or use our standard designs.


Our installation service provides a full package from groundworks to the plumbing and electrical installation. Our garden buildings are fully insulated to the highest standard keeping the ongoing running costs extremely low.

If you need a simple annex bedroom space or a full self-contained annex with a heating system, bathroom & kitchen installation get in touch, we can help.

Our installation is very quick and clean when compared to a typical block built garden annex, our standard installation time is around 3 - 6 weeks depending on the size of the annex. We plan, design and install all aspects of your annex, this means you don't have to deal with any other trades, we take care of all of this for you.


Garden annexes, garden buildings with sleeping accommodation and external guest rooms will require planning permission, however, we are more than happy to take care of any planning permission and help guide you through this process. Attaining planning permission for a garden annex in Cornwall is a much simpler task than it may first sound.

If you have any further questions get in touch with us here at Think External, we are here to help.



Our prices quoted include everything you need for a perfect garden annex in Cornwall:-

✔ Planning & Building Regulations
✔ Foundations
✔ Installation of all services for the bathroom & kitchen
✔ Installation of drainage and making good any areas disturbed during the installation
✔ Sewer or septic tank connection
✔ Mains electrical connection and full electrical installation
✔ Smoke & heat detection
✔ Internet and phone connection from existing property
✔ Heating system
✔ LED lighting
✔ Flooring
✔ Fully plastered
✔ Decorated
✔ Fully insulated to ensure year-round use with low energy bills
✔ Bathroom*
✔ Kitchen*

* Bathroom's & Kitchen's are quoted separately due to the large range of styles and types available.

View some of the possible garden room and annex products and finishes here.

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Garden Annex Cornwall