Detroit, MI Landscaping Rules: Rainwater Harvesting (2026)
Key Facts
- Governing section
- Detroit City Code § 50-12-522
- Urban garden size cap
- Up to one acre
- Permit trigger
- Only if structure exceeds 100 sq ft
- District status
- By-right (R) in most zones
Summary
Detroit's zoning code lists rainwater catchment systems as a permitted accessory feature on any urban garden, alongside rain barrels, cisterns, and compost bins.
Only the following accessory uses and structures shall be permitted on an urban garden. ... (4) Benches, bike racks, raised/accessible planting beds, compost bins, picnic tables, garden art, and rainwater catchment systems; (5) Tool sheds and shade pavilions; (6) Garages.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 4).
Full Breakdown
Under Sec. 50-12-522, an urban garden, any zoning lot up to one acre used to grow food or non-food crops for personal or group use, may include rainwater catchment systems as an accessory structure, along with benches, raised beds, compost bins, and garden art. Urban gardens are a by-right use in most residential and many other districts citywide. A building permit is required only if an accessory structure exceeds 100 square feet of gross floor area (Sec. 50-12-455); a typical rain barrel or small cistern falls well under that.
Violations & Fines
Rainwater catchment systems themselves aren't separately penalized: issues arise if the underlying accessory structure exceeds 100 sq. ft. without a permit (general accessory-structure violation) or if catchment runoff is discharged into the sanitary or combined sewer system, which BSEED and DWSD can cite under the plumbing and sewage-discharge provisions.
Frequently Asked Questions
Can I put a rain barrel or cistern on my Detroit garden lot?
Do I need a permit for a rain barrel in Detroit?
Sources & Official References
Other rules in Detroit
Compare Detroit to another location·View the Michigan landscaping rules overview
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