Compact Hempcrete Extension, London

A modestly sized rear single-storey extension, which has been carried to completion by the self-builder client to an impressive specification. This hempcrete extension is small but perfectly formed.

Studio Bio acted as principal designer and provided specialist biobased technical design consultancy. Natural Building Store, our online shop front, supplied biobased products such as wood fibre boards and hempcrete blocks.

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Our Design Studio

Established in 2019, our in-house design studio, Studio Bio, developed out of an industry demand for designers with a specialist knowledge of bio-based construction and detailing.

Our director, Alex Sparrow, leads a growing team, designing buildings from a material-first perspective, to ensure that the implications of building with hempcrete are considered from the very first drawing. To find our more about our services, click the button below.


We have a range of packages for each design stage to suit your project. Call us on 01629 343143 or email design@ukhempcrete.com to discuss how we can get involved with your project! Alternatively, you can fill out our 2-minute contact form to tell us more about your project: