8 county-level rules, plus city-specific rules for 1 city in Oakland County, Michigan.
Verified from official government sources
Oakland County does not maintain a county-wide grass-height ordinance. Each of the 62 cities, villages, and townships (Royal Oak, Troy, Farmington Hills, Pontiac, Southfield, Bloomfield Hills, etc.) sets its own maximum height under authority of Michigan's Noxious Weeds Act (MCL 247.61 et seq.). Typical caps on improved residential lots range from 6 to 12 inches; unimproved lots are often 16 inches or higher.
MCL 247.64
The owner of land on which noxious weeds are found growing shall destroy the weeds before they reach a seed bearing stage and prevent their regrowth, or shall prevent them from becoming a detriment to public health.
Tree trimming on private property is regulated by individual Oakland County municipalities; there is no county-wide private-property trimming ordinance. Trimming within a county road right-of-way requires a permit from the Road Commission for Oakland County (RCOC). Trimming on a state highway (M-1 Woodward, M-10, M-59, I-75, I-696, etc.) requires a permit from MDOT under Act 200 of 1969.
There is no Oakland County-wide tree-removal ordinance. Tree-protection rules are set by individual municipalities. Bloomfield Hills, Bloomfield Township, West Bloomfield, Birmingham, Rochester Hills, Novi, and Oakland Charter Township each require permits before removing landmark, heritage, or specimen trees (typically 6-10 inch diameter at breast height or larger). Many require replacement at 1:1 to 3:1 ratios or payment into a tree-replacement fund.
Noxious weed control in Oakland County is governed by Michigan's Noxious Weeds Act (Act 359 of 1941, MCL 247.61-247.72). Each city, village, and township appoints a Commissioner of Noxious Weeds with authority to inspect properties, order destruction of listed weeds, and abate at owner's cost. Listed weeds include Canada thistle, giant hogweed, poison ivy, ragweed, and others.
MCL 247.62
'Noxious weeds' includes Canada thistle (Cirsium arvense), dodders (any species of Cuscuta), mustards (charlock, black mustard, and Indian mustard, being Brassica kaber, Brassica nigra, and Brassica juncea), wild carrot (Daucus carota), bindweed (Convolvulus arvensis), perennial sowthistle (Sonchus arvensis), hoary alyssum (Berteroa incana), giant hogweed (Heracleum mantegazzianum), ragweed (Am...
Michigan and Oakland County do not impose mandatory year-round outdoor watering restrictions. However, individual water systems (most served by Great Lakes Water Authority through Oakland County WRC) issue boil-water and conservation advisories during emergencies. The May 2026 water emergency in Auburn Hills, Lake Orion, and Rochester Hills required residents to limit outdoor water use including lawn watering.
Rainwater harvesting is legal and encouraged in Oakland County. The Oakland County Water Resources Commissioner's RainSmart Rebates program pays homeowners in southeast Oakland County up to $2,000 per property for rain barrels, rain gardens, and native trees. Rain barrels are reimbursed at $125 each (up to 2 per property) and must be at least 50 gallons.
Oakland County WRC RainSmart Rebates Program Rules
Rain Barrels: Minimum 50 gallon/barrel; up to two barrels/property. Rebate: $125 per barrel. Rain Gardens: Minimum 75 Square feet; must consist of at least 75% native species. Rebate: $6 per square foot. Trees: Minimum 5 feet tall; must be on the eligible tree list; up to two trees per property. Rebate: $250 per tree.
Oakland County actively promotes native Michigan plants through the RainSmart Rebates program. Qualifying rain gardens must be at least 75 square feet and consist of at least 75% native species; they are reimbursed at $6 per square foot. Invasive species are prohibited from rebated installations.
Oakland County WRC RainSmart Rebates - Rain Garden Requirements
Rain Gardens: Minimum 75 Square feet; must consist of at least 75% native species. Rebate: $6 per square foot.
Oakland County has no county-wide ordinance specifically governing artificial turf. Installation is regulated through individual municipal zoning codes, which typically address it under landscaping standards, impervious surface ratios, and stormwater management. Most cities count artificial turf as a permeable or partially-impermeable surface depending on the base material.
1 cities in Oakland County have their own landscaping rules rules. Each link goes to that city's dedicated page with code citations.
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