Belsize Grove
Camden, London

The London Borough of Camden appointed Baily Garner to deliver energy performance improvements to 5–7 Belsize Grove, a hard-to-treat 19th-century Victorian villa located in a conservation area.
The brief focused on enhancing energy efficiency, thermal comfort and occupant health, while managing moisture and ventilation in line with PAS2035 standards. A key objective was to reduce carbon emissions and reliance on fossil fuels—ultimately helping residents cut energy bills.
Baily Garner acted as contract administrator and PAS2035 coordinator, taking on a multidisciplinary role. We led a fabric-first retrofit strategy, installing vapour-permeable, high-specification external wall insulation and replacing all windows with high-performance alternatives that respected the villa’s original appearance.
The works were planned with great care to minimise disruption to residents in this densely populated and continuously occupied building. The balance between conservation constraints and sustainable improvement was central to our approach.
The project reached Practical Completion in June 2024. It now stands as a model for effective, low-carbon retrofitting in challenging conservation area contexts—delivering tangible improvements in energy efficiency, comfort, and long-term affordability for residents.
Delivering a retrofit within a conservation area without disrupting residents.
A carefully planned, fabric-first approach with close attention to heritage and occupant needs.
A significantly upgraded building that demonstrates how sustainability and conservation can work hand in hand.
To find out more about our work on the Irene House project, contact our Project Lead, Matt Allcock

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