Overheating Assessments (Part O)
Demonstrate compliance with Part O by assessing and limiting overheating risks in new dwellings.
Overheating Assessments (Part O)
Demonstrate compliance with Part O by assessing and limiting overheating risks in new dwellings.
What is it?
Assessment to ensure buildings do not exceed thermal comfort limits, using Simplified Method or TM59 modelling.
Why It Matters?
Overheating is a Building Regulations failure risk and a major comfort/safety issue.
What standards do we adhere to?
Approved Document O, CIBSE TM59.
Our Process
Gather site/orientation data
Run overheating model
Recommend mitigation measures
Issue report for Building Control
Compliance Bundles
Tailored packages to simplify your safety responsibilities and save you time.
As Designed Bundle
Ideal for planning and design stage
- SAP/SBEM Calculations (Design Stage)
- Overheating Assessment (Simplified or TM59)
- Water Efficiency Calculations
- Bespoke PSI Values (where required)
Book an As Designed bundle and get priority scheduling for your As Built stage testing.
As Built Bundle
Ideal for completion and sign-off
- SAP/SBEM Calculations (As Built)
- Air Pressure Testing
- Acoustic Testing
- Ventilation Flow Rate Testing
Book an As Designed + As Built package together and save 10% on total compliance costs.
Frequently Asked Questions
How quickly can you deliver results?
Many reports and test results can be turned around within 48 hours.
Can you work alongside my design team?
Yes — we regularly collaborate with architects, MEP consultants, and contractors to ensure smooth compliance.
Do you travel nationwide?
Yes — we operate across the UK.
Can I bundle services?
Yes — bundling services saves both time and money, and we’ll coordinate testing for maximum efficiency.