Interactive Calculator
Frequently Asked Questions
- When is the rational method appropriate?
- It is generally acceptable for small, highly impervious drainage areas (typically under 20 acres).
- Is this legally binding?
- No. These tools provide estimates for preliminary site analysis. Always consult an architect, engineer, or land use attorney for final submissions.
Related Resources
- Casework
- Tools
- Cpd
- Guides
- Floor Area Ratio (FAR) Calculator
- Transit-Oriented Parking Minimums
- Daylight Plane Analyzer
- Affordable Housing Density Bonus
- Lot Coverage Percentage
- Open Space Requirement
- Retail Frontage Ratio
- Bicycle Parking Requirements
- Tree Canopy Replacement
- Inclusionary Zoning Fee-in-Lieu
- Practice Guide 1
- Practice Guide 2
- Practice Guide 3
- Practice Guide 4
- Practice Guide 5
- Practice Guide 6
- Practice Guide 7
- Practice Guide 8
- Practice Guide 9