Lansing, MI Accessory Structures: ADU Rules (2026)
ADU rules in Lansing, MI, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- ADUs per lot
- One
- Eligible districts
- R-1, R-2, R-3, R-MX, DT-1
- Max bedrooms
- Two
- Placement
- Rear yard or converted garage
- Citation
- § 1250.04.08(b)
Summary
Lansing allows one detached or garage-converted accessory dwelling unit per single-family lot in the R-1, R-2, R-3, R-MX and DT-1 districts, capped at two bedrooms and limited square footage.
Only one ADU is allowed on lots with an existing single-family principal dwelling in the R-1, R-2, R-3, R-MX, and DT-1 zoning districts. An ADU shall be detached in the rear yard subject to the size limitations of this chapter or be part of an accessory building (such as a converted garage or carriage house), subject to the size limitations of maximum square footage of detached accessory garages in Table 1250.04.01... An ADU is limited to a maximum of two bedrooms.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64).
Full Breakdown
Lansing Codified Ordinances § 1250.04.08(b) permits one accessory dwelling unit on a lot with an existing single-family home in the R-1, R-2, R-3, R-MX and DT-1 zoning districts. The ADU must be detached in the rear yard or built into an accessory building such as a converted garage or carriage house, sized under Table 1250.04.01's detached-garage maximums, and is capped at two bedrooms; the principal house cannot be split into two units to create an ADU. This governs the City of Lansing, Michigan, in Ingham County, not East Lansing or Lansing Township, which set their own rules.
Violations & Fines
Building or converting a garage into an unpermitted ADU is unpermitted zoning use; the Zoning Administrator or Code Compliance Office can issue a stop-work order and a municipal civil infraction citation.
Frequently Asked Questions
Can I have more than one ADU on my Lansing lot?
Which zoning districts allow ADUs in Lansing?
Sources & Official References
Other rules in Lansing
How Lansing compares: Easiest Cities to Build an ADU·Compare Lansing to another location·View the Michigan accessory structures overview
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