Overheating Compliance: From Regulation to Resilient Design
Published
24th June • 2026
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Published
24th June • 2026
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As temperatures continue to rise across the UK, overheating is becoming an increasingly important consideration in building design.
In cities like London, the urban heat island effect can significantly increase temperatures, reinforcing the need for climate-resilient buildings that remain comfortable and efficient throughout their lifespan.
Regulations are evolving to address this challenge. Part O requires residential developments to limit solar gains and provide effective heat-removal strategies, while many local authorities now require overheating assessments based on future climate scenarios.
A passive-first approach remains central to effective mitigation, with measures such as external shading, façade optimisation, high-performance glazing, and natural ventilation helping to reduce overheating risk before mechanical ventilation is considered.
With BREEAM V7 placing greater emphasis on climate resilience and future overheating risk, decisions made at the earliest design stages are becoming increasingly critical.
We support clients through Part O assessments, TM52 and TM59 modelling, BREEAM analysis, and overheating mitigation studies, helping to deliver buildings that are compliant, comfortable, and resilient for the future.
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