About Grannexe
A family-owned business with over 50 years of garden building expertise, based in Biggin Hill. As part of Garden Office Buildings, we specialise in creating contemporary, fully-insulated annexes and garden homes, that bring the family together.
We've been in the business since 1965
Grannexe, part of Garden Office Buildings, are specialists in constructing the best granny annexes in the UK.
We are a family run business based in Biggin Hill, Kent, with 50+ years of experience in the garden building industry.
We’re passionate about bringing the whole family together with our modern and turnkey granny annexe solutions.
We created Grannexe to offer a specialised granny annexe and tiny home service, and believe we have developed the best looking and most insulated garden annexe product on the market.
We welcome you to visit our showroom or a previous project to view our annexe buildings in person.
We are based in Biggin Hill, Kent, but offer our services all over England.
Why Choose Us?
- Passionate about creating incredible living space for our customer
- 50+ years of experience in the industry
- We have built hundreds of buildings in South East England
- Granny annexe and tiny home specialists
- Family run business