Part O Overheating Calculations for New Residential Buildings
Whether you are designing a new home, apartment scheme or glazing-heavy residential development, we assess the risk of summertime overheating and help identify practical solutions for Building Control approval.
Building Regulations for Reducing Overheating Risk
Part O was introduced to help ensure new residential buildings are designed to limit excessive heat during warmer periods.
As homes become better insulated and more airtight, overheating risk can increase if solar gains, glazing, ventilation and orientation are not properly considered. Part O helps address this by requiring designers to show that reasonable measures have been taken to reduce overheating and provide a way for excess heat to escape.
Part O is especially important for modern homes with large windows, rooflights, high levels of insulation or limited natural ventilation.
Part O Overheating Calculation Pricing
| Part O Overheating Calculation Pricing | Price (No VAT) |
|---|---|
| Simplified Method | From £200 |
| Dynamic Simulation Method | Circa £900 |
Overheating Assessments for New Residential Projects
Part O applies to new residential buildings and is commonly reviewed as part of the Building Control process.
The assessment is particularly relevant where a design includes large glazed areas, south or west-facing windows, limited cross ventilation, apartments, compact layouts or homes located in higher-risk areas.
New Build Homes
Overheating compliance support for individual houses and residential developments.
Apartment Schemes
Part O assessments for flats, multi-unit residential buildings and higher-density schemes.
Glazing-Heavy Designs
Support for homes with large windows, rooflights, glazed doors or modern open-plan layouts.
Building Control Requests
Reports prepared to respond to overheating compliance queries or submission requirements.
Clear Part O Support from Design Review to Compliance Report
- Review of drawings, layouts and residential unit information.
- Assessment of glazing areas, orientation and window openings.
- Simplified Method overheating calculation where suitable.
- Review of ventilation and purge ventilation provisions.
- Identification of potential compliance issues.
- Practical recommendations where improvements are needed.
