Troy, Michigan zoning
A plain-language summary of the Troy zoning ordinance, organized by district and topic. Source: the official ordinance on city-hosted PDF, last reviewed July 4, 2026.
Zoning districts
- R-1AResidential
One-Family Residential
The largest-lot one-family district, with half-acre lots and 120 feet of width.
- R-1BResidential
One-Family Residential
One-family homes on lots of at least 15,000 square feet.
- R-1CResidential
One-Family Residential
One-family homes on lots of at least 10,500 square feet.
- R-1DResidential
One-Family Residential
One-family homes on lots of at least 8,500 square feet.
- R-1EResidential
One-Family Residential
The smallest-lot one-family district, 7,500 square feet minimum.
- RTResidential
One-Family Attached
Two-family dwellings and one-family attached dwellings by right.
- MFResidential
Multiple-Family
Multiple-family housing, with density and height tiers set by whether the site abuts single-family homes.
- URResidential
Urban Residential
High-density urban residential, including multiple-family buildings of nine or more stories.
- MHPResidential
Manufactured Housing
District for manufactured housing communities.
- CFSpecial purpose
Community Facilities
Public and community facility uses such as civic and institutional sites.
- EPSpecial purpose
Environmental Protection
A district that protects environmentally sensitive lands from intensive development.
- CBCommercial
Community Business
Community-scale retail, restaurants, offices, banks, and entertainment uses.
- GBCommercial
General Business
Broader business district that adds building supply, garden centers, outdoor recreation, and vehicle-related special uses.
- IBIndustrial
Integrated Industrial and Business
Manufacturing, laboratories, warehousing, and research uses, with multiple-family dwellings also permitted by right.
- OCommercial
Office
Troy's office district.
- OMMixed use
Office Mixed Use
Office uses mixed with other uses per the Section 4.21 schedule.
- RCCommercial
Research Center
District for research center uses.
- PVCommercial
Planned Vehicle Sales
District for planned vehicle sales uses.
- PSpecial purpose
Vehicular Parking
District reserved for vehicular parking.
- BBMixed use
Big Beaver
Form-based district along the Big Beaver corridor, regulated by Article 5.
- MRMixed use
Maple Road
Form-based district along Maple Road, regulated by Article 5.
- NNMixed use
Neighborhood Node
Form-based district for small mixed-use neighborhood nodes, regulated by Article 5.
Rules by topic
- Permitted usesWhat you can do by right in each zoning district.
- Special land usesUses that need special approval before they are allowed.
- SetbacksHow far buildings must sit from property lines.
- Building heightHeight limits by district, and the exceptions.
- Lot coverageHow much of a lot buildings may cover.
- Lot size and widthMinimum lot area and width requirements.
- ParkingRequired spaces, driveway rules, and surfaces.
- Accessory dwelling unitsWhether a second dwelling unit is allowed.
- Garages, sheds, and accessory structuresSize caps, setbacks, and height limits for detached structures.
- FencesHeight limits, placement, and prohibited materials.
- SignsWhat signs are allowed and where.
- Home occupationsRunning a business from a residence.
- Variances and appealsWho decides, what standard applies, and the sequence.
Common questions
- When does an accessory building need a permit in Troy?
- Are accessory dwelling units (ADUs) allowed in Troy, Michigan?
- Are apartments allowed in Troy's IB district?
- How big can an attached garage be in Troy?
- Are barbed wire or electric fences allowed in Troy?
- Can I run a bed and breakfast in Troy, Michigan?
- What are the zoning rules for churches in Troy, Michigan?
- What are the commercial parking requirements in Troy, Michigan?
- What are the fence rules for a corner lot in Troy?
- What setback applies to the street side of a corner lot in Troy?
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