Wind & Microclimate Assessment
Lawson Comfort Criteria & CIBSE Wind Environment Analysis
Building Details
Site Context
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Proposed Mitigation
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About this tool: Wind & Microclimate
Lawson comfort criteria screening — pedestrian wind comfort and safety, downdraught and wind-tunnelling risk around taller or exposed buildings.
Use for tall buildings or schemes whose massing could create uncomfortable or unsafe wind conditions at ground level.
Lawson Comfort Criteria, City of London Wind Microclimate Guidelines
Use these tools when preparing technical reports and compliance documentation. Many of these are validation requirements — submit without them and your application will be returned. Use the Validation Pre-Flight tool to check which ones you actually need.
Guidance to help you prepare — not formal planning advice. Check the current policy text and your council's local plan before relying on it.