Lot Coverage Calculator

How Does the Lot Coverage Calculator Work?

This calculator helps you estimate the maximum buildable footprint on your lot based on zoning regulations that restrict total lot coverage.

• Enter your lot's width and length.
• Input the maximum allowed coverage percentage (from your local zoning code).
• The tool will calculate your total lot area and the maximum square footage you're allowed to cover with structures.

Why Lot Coverage Matters

Lot coverage rules are designed to preserve open space, manage drainage, and limit overdevelopment. They vary widely based on zoning and property type.

A Practical Example

Imagine a 60 ft × 100 ft lot. That's 6,000 sq ft total. If zoning allows 40% coverage, your maximum buildable area is 2,400 sq ft.

That 2,400 sq ft includes your home, garage, and any other covered structures. Going over that limit may require variances or redesigns.

Where to Find Your Lot Coverage Rules

Check your city or county zoning ordinance under the "development standards" or "bulk regulations" section. If you don't know your zoning, try looking it up with your local GIS zoning map or assessor portal.