What is the maximum lot coverage in Royal Oak?

30% for lots of 6,000 square feet or more in One-Family Residential. Lots under 6,000 square feet may cover 35%, but the total ground floor area of all buildings on a small lot is capped at 1,800 square feet (§ 770-34D(8)).

The count includes accessory buildings. Your garage and shed floor area counts toward lot coverage along with the house (§ 770-22A(6)).

One-Family Large Lot uses 30%. Two-family dwellings in 2F also use 30%, but single-family detached dwellings in 2F inherit 1F standards under § 770-36B(1), including the under-6,000-square-foot 35% limit and 1,800-square-foot ground-floor cap (§§ 770-35D, 770-36D).

Run the numbers before designing. A 5,000 square foot lot at 35% allows 1,750 square feet of footprint, under the 1,800 cap, so the percentage controls. A 5,500 square foot lot would hit the 1,800 square foot cap first.

For close calls on what counts toward coverage, ask the planning division at 248-246-3280.