Air Quality Neutral Assessments in Greater London – How Viridian Air Can Help
Developers in Greater London must now meet strict planning requirements to demonstrate that their proposals are Air Quality Neutral (AQN). Under the London Plan and supported by detailed Air Quality Neutral Guidance, all major developments are expected to show that they will not worsen local air pollution through either building or transport emissions.
At Viridian Air, we specialise in delivering clear, robust AQN assessments that help our clients meet these requirements and gain planning approval without delay.
What Is Air Quality Neutral?
An Air Quality Neutral assessment ensures that a development’s nitrogen oxides (NOx) and particulate matter (PM10) emissions are no greater than defined emission benchmarks for its type, size, and location. This includes emissions from:
- Building energy use (heating, cooling, ventilation)
- Associated traffic and transport generated by the development
These benchmarks are set out in the GLA’s 2023 Air Quality Neutral Guidance, which applies to both residential and commercial developments across all London boroughs.
View the AQN Guidance (GLA, 2023)
How Viridian Air Can Help
Our team provides end-to-end AQN support, including:
- Baseline emissions calculations for building energy and transport
- Comparison with relevant AQN benchmarks
- Advice on design improvements or mitigation, if emission limits are exceeded
- Clear, GLA-compliant reporting for submission with planning applications
We work closely with planning consultants, architects, and developers to ensure assessments are accurate, timely, and aligned with both local and regional requirements.
Supporting Planning Success in London
Failing to meet AQN standards can delay planning approval or trigger the need for costly mitigation. With our experience in London planning policy and air quality modelling, Viridian Air provides the expertise needed to get it right first time.
Need an Air Quality Neutral assessment for your London development?
Get in touch with us at info@viridianair.co.uk or visit viridianair.co.uk to speak with our air quality specialists.
Let us help you stay compliant, reduce risk, and build sustainably in London.
Air Quality Neutral starts with the right assessment: partner with Viridian Air.