Lot Coverage Calculator
Enter your building footprint and lot area to instantly get your lot coverage ratio and see whether it meets your local zoning limit.
Enter Measurements
Ground-floor outline of all structures (house, garage, sheds, covered patios).
Lot Coverage Ratio
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0%
100%
Breakdown
Total Lot Area
Building Footprint
Lot Coverage
Remaining Buildable Area
Area Over Limit
Note: Lot coverage definitions vary by jurisdiction. Always verify which structures count toward coverage and the exact limit for your zoning district before making design or purchase decisions.
Summary
Enter your building footprint and lot area to instantly get your lot coverage ratio and see whether it meets your local zoning limit.
How it works
- Enter the total area of your lot (square feet or square meters).
- Enter the building footprint area — the ground-floor outline of all structures on the lot.
- Optionally enter your local zoning maximum coverage percentage.
- The calculator divides footprint by lot area and multiplies by 100 to get your coverage ratio.
- A compliance indicator shows whether your ratio is under, at, or over the zoning limit.
Use cases
- Check whether a planned addition or new structure will exceed your zoning lot coverage limit.
- Estimate how much additional building area is still allowed on a parcel.
- Compare coverage across multiple lots when evaluating investment properties.
- Verify a seller's lot coverage claim before closing on a property.
- Help architects and builders stay within permitted footprint during early design.
- Understand remaining buildable area before applying for a building permit.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu