How big can my garage be in Macomb Township?

The baseline is 900 square feet of garage per parcel in the AG, R-1-S, R-1-E, and R-1 districts, on every lot-size tier of the accessory building table (Sec. 10.0331.5). If your house exceeds 3,000 square feet of floor area, you may instead build an attached garage of up to 30 percent of the house's floor area, capped at 1,200 square feet (Sec. 10.0331.5, footnote 5).

Two wrinkles: garage floor area above 800 square feet counts against your allowable accessory building area (footnote 1), and second-story space does not count toward the square footage allowance (footnote 4). A detached garage goes in the rear yard, 7.5 feet off side and rear lines, 10 feet from the house, with height capped by your lot-size tier, from 12 feet on small lots up to 22 feet on 5 acres or more (Sec. 10.0331.3; Sec. 10.0331.5). The exterior must be finished to match the character of the house with face brick, decorative block, wood, aluminum, vinyl, or composition siding (Sec. 10.0331.11).