the what + who

OaO is an adventurous emerging architecture studio based in London & Berkhamsted, Hertfordshire. We create environmentally progressive architecture for the future. 


OaO works extensively around West and North London + the Chilterns with active projects in Borough of Ealing, Buckinghamshire, Hertfordshire and Bedfordshire


Our belief is that architecture should be a positive, transformative and sustainable force in society.

'Our goal is simple to create architecture that works for our lives and our planet'


For us Architecture is "Sculpting space for light" therefore our attention to material detail is key to adding texture & depth to our architecture. This choice in material impacts the inhabitants of our buildings, so we source this with wellbeing in mind, creating balanced healthy sustainable environments to work and live in. ​

Founded by Olli Andrew an award winning Architect.


Olli has worked for some of the worlds leading architecture practices. 

An ecologist Olli setup 

OaO to prove architecture can 

be sustainable and help to build a better tomorrow. 


At OaO we see working together differently, its all about collaboration. We work with organisations, home owners and businesses in collaboration or as we like to say "collab". This approach allows us to quickly incubate ideas, concepts and innovative solutions to challenges. As architects we are natural problem solvers mixing this with cross pollenating ideas makes a highly creative forum for transformative design. 

"incredible talents. They designed and executed my the side return extension and kitchen renovation impeccably"

We have just been named 'Houzz' '2021 best service award', click the Houzz logo below to read our reviews and testimonials. ​As well as our Google Reviews. 

OaO are accredited by the ARB (Architects Registration Board) and are an Accredited Practice of the RIBA 

 (Royal Institute of British Architects) 

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