Jon brings nearly 30 years of experience designing retrofit projects that place sustainability and social value at their core. As Managing Director of Barr Gazetas since 2016, he leads the practice’s approach to low‑carbon design and works across a diverse portfolio for clients including The Crown Estate, Grosvenor, British Land and M+G.

He focuses on creating inclusive, sustainable places through retrofit and creative reuse for both people and the planet, staying closely involved in projects and contributing to the practice’s net‑zero strategies. In particular, he led the delivery of Holbein Gardens, the first Grade II listed building to achieve BREEAM Outstanding in the UK, which set a benchmark for office retrofit and stands as one of London’s most sustainable workplaces.