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Tree Impact Assessment
BS 5837:2012 tree survey screening — RPA calculation, category assessment, and impact analysis
About this tool: Trees
BS 5837:2012 tree categorisation (A/B/C/U), Root Protection Area calculation, TPO checking, and replanting ratio guidance.
When to use it
Use when there are trees on or near your site. A tree survey is often a validation requirement. TPO trees need consent for any works.
Policy and guidance it draws on
BS 5837:2012, Town & Country Planning (Tree Preservation) Regs 2012
Part of Site Intelligence
Use these tools early in your project to understand what environmental, heritage, and ecological constraints affect your site. The results will determine which technical reports you need and shape your application strategy.
Related tools
Flood Risk AssessmentFlood ScreeningContaminationGround StabilityEcologyBNG CalculatorHeritageArchaeologyGuidance to help you prepare — not formal planning advice. Check the current policy text and your council's local plan before relying on it.