Allen County, IN Landscaping Rules: Rainwater Harvesting (2026)
Key Facts
- Rainwater harvesting
- Legal, unrestricted
- Outdoor rain barrels
- No permit
- Plumbed/large systems
- Building Dept. review
- Mosquito rule
- Allen Co. Code 10-12-2-12
- Stormwater benefit
- Supports Title 19 goals
Summary
Rainwater harvesting is legal in Indiana with no state or Allen County ban. Residential rain barrels for garden and lawn use generally need no permit; only larger cisterns or plumbed non-potable systems must meet Indiana building and plumbing code.
Containers stored outside, including, but not limited to buckets, planter drip trays, rain barrels, bird baths, gutters, and kiddie pools, must be removed, screened or dumped/flushed out regularly to prevent a breeding environment for mosquitoes.
Official source re-checked September 8, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Indiana places no statewide restriction on collecting rainwater, and Allen County has no ordinance limiting residential rainwater harvesting. A homeowner in the unincorporated county may install rain barrels or a simple cistern to capture rooftop runoff for outdoor irrigation without a county permit. Larger storage systems, or any system plumbed into the home for non-potable indoor use, must comply with the Indiana Plumbing Code and be reviewed by the county Building Department. Because rainwater capture reduces stormwater runoff, it also aligns with the goals of the Allen County Stormwater Management ordinance (Title 19). Health-code rules require any open water container to be maintained so it does not breed mosquitoes.
Violations & Fines
No county penalty applies to residential rainwater harvesting for outdoor use. Plumbed or large-capacity systems installed without required Building Department review can be red-tagged.
Frequently Asked Questions
Can I put a rain barrel on my house in Allen County?
Do bigger rainwater systems need a permit?
Sources & Official References
Other rules in Allen County
Compare Allen County to another location·View the Indiana landscaping rules overview
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