Part O of the Building Regulations was introduced to reduce the risk of overheating in new residential dwellings in England. With homes becoming more airtight and summers growing hotter, overheating is a growing health risk — especially in flats and urban developments.
Key aims of Part O:
• Limit unwanted solar gain
• Ensure effective removal of excess heat
• Support health, safety, and comfort of occupants
Applies to: New-build homes, including flats, houses, and student housing
Doesn’t apply to: Extensions, conversions, or non-residential buildings
Doesn’t apply to: Extensions, conversions, or non-residential buildings
See Building Regulations