Buildable Area Calculator
Calculate maximum buildable area from FAR, lot coverage, setbacks, and height limits.
Inputs
SF
ft
ft
%
ft
ft
ft
Results
Max Buildable Area
40,000 SF
Max Footprint
12,000 SF
Max GFA (FAR Limit)40,000 SF
Buildable Envelope13,200 SF
Setback Area6,800 SF
Effective FAR2
Effective Coverage60%
How to Use This Calculator
- Enter Lot Area in square feet, Lot Width, and Lot Depth from the survey or property record.
- Set Floor Area Ratio (FAR) and Max Lot Coverage % from the applicable zoning code.
- Enter Front, Side, and Rear Setback distances to calculate the net buildable footprint.
- Set Max Stories allowed by zoning.
- Review Max Buildable Area (FAR-limited) and Max Footprint (coverage-limited) — the binding constraint is the smaller value.
- Use outputs to assess development feasibility before ordering full engineering or purchasing the site.
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