EA Flood Zones · CIRIA C753 SuDS Manual · NPPF · BS 8582

Floodwise

UK flood risk screening and SuDS design tool. Determine flood zone, calculate runoff rates, and get preliminary SuDS sizing recommendations for planning applications.

Site Details
Surface Areas
Break down the development footprint by surface type
NPPF
National Planning Policy Framework requires flood risk assessment
SuDS
Sustainable Drainage Systems mandatory for new developments
10%
minimum BNG (Biodiversity Net Gain) required

Every UK planning application in a flood risk area requires a Flood Risk Assessment (FRA) and SuDS design. This tool calculates design rainfall, runoff rates, and attenuation requirements — then recommends SuDS solutions with sizing, costs, and CIRIA C753 references. From screening to preliminary design in one session.

Planning Consultant Civil Engineer Developer NPPF CIRIA
Pricing
Flood risk and SuDS design for planning submissions

Free

£0
flood zone check
  • Flood zone identification
  • Basic planning advice

Starter

£499
per site
  • Flood zone + runoff calc
  • Basic SuDS recommendations
  • PDF report for planning

Professional

£1,499
per year
  • Full SuDS sizing + costing
  • Attenuation volume calc
  • Multi-site assessments
  • Priority support

Enterprise

£1,999
per year
  • Everything in Pro
  • API access
  • Custom SuDS libraries
  • White-label reports

Planning-Ready Flood Risk Screening

Meet EA and LLFA requirements with data-driven SuDS design aligned to CIRIA C753.