Part O Compliance Through Expert Overheating Risk Analysis

At Sustainabuild Compliance, we provide Overheating Assessments in accordance with Building Regulations Part O, ensuring that residential buildings are designed to minimize the risk of excessive indoor temperatures. Our service helps developers, architects, and builders create healthy, habitable environments – even during heatwaves or periods of high external temperatures.

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What Our Overheating Assessment Covers:

Building Regulations Part O Compliance

New homes must now demonstrate that they meet the requirements of Part O, introduced to tackle overheating in dwellings. We provide all the necessary analysis and documentation to prove compliance for Building Control.

Dynamic Thermal Modelling

We use CIBSE TM59-compliant dynamic thermal modelling to simulate how indoor temperatures behave throughout the year. This method provides accurate and defensible data for compliance and design optimisation.

Overheating Risk Assessment

Our experts evaluate critical factors such as solar gains, glazing ratios, window opening areas, room orientation, and night-time ventilation strategies to determine overheating risk levels.

Mitigation Strategies & Recommendations

Where risks are identified, we provide tailored solutions such as solar shading, natural ventilation design, glazing modifications, and other passive or mechanical strategies to reduce internal heat build-up.

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Why Choose SustainaBuild Compliance?

• ✅ Fully compliant with CIBSE TM59 methodology
• ✅ Fast, reliable thermal modelling and reporting
• ✅ Experienced assessors for urban and rural developments
• ✅ Collaborative design support to avoid costly rework
• ✅ Detailed, clear documentation for Building Control

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Who Needs an Overheating Assessment?

Overheating assessments are required for:

• New residential dwellings in England (from June 2022 onwards)
• Buildings with large areas of glazing or limited cross-ventilation
• Urban infill or high-density housing developments
• Projects using mechanical cooling systems or with overheating risk due to orientation

Book Your Assessment Today

Ensure your development meets the new Part O requirements and protects future residents from overheating-related health risks by booking a free project consultation with our team today