Lot Coverage

Say your zoning sets 35% lot coverage and your lot is 10,000 square feet. Your home, garage, and covered structures can then cover no more than 3,500 square feet of ground. That is what lot coverage controls. It is the zoning rule that caps how much of your lot the buildings may sit on.

The rule exists to control bulk and density. By limiting footprint, a city keeps open space, drainage area, and room between homes. It stops a lot from being almost entirely roofed over. What counts toward coverage varies by city. The main house and garage almost always count. Uncovered patios, pools, and driveways often do not. Covered patios and casitas may or may not, depending on the ordinance. That last group is where owners get surprised, so read the definition in your own ordinance rather than assuming. Lot coverage also works alongside setbacks and height limits. Your buildable footprint is whatever survives all three rules at once.

Take a Scottsdale lot that allows a generous footprint by setback alone. A 35% coverage cap can still hold a single-story home to a smaller floor plate than the owner wanted. That pushes the design toward a second story or a tighter footprint.

Lot coverage differs from a setback, which controls distance from the property lines. It also differs from floor area ratio, which some cities use to cap total floor area across every story. Coverage is strictly about ground footprint. Private CC&Rs can set a stricter limit than the city does. We check the cap early, because it can quietly decide the largest single-story home a lot will hold.