Boise's Rat Ordinance, Explained for Homeowners

Why the city acted

Norway rats and roof rats — both invasive in Idaho — have spread across the Treasure Valley in the last several years, traveling irrigation canals and nesting in older neighborhoods, especially around the Boise Bench, the river corridor, and downtown alleys. Central District Health's sighting program logged 838 reports in about five and a half months, more than half of them inside Boise. The ordinance targets the conditions that feed and shelter rats, because a neighborhood problem can't be trapped one house at a time.

What the ordinance requires

Every Boise premises must:

• Keep garbage and food waste in rodent-proof containers, and repair overflowing or damaged carts.
• Store attractants — pet food, bird seed, fallen fruit and nuts — out of rats' reach.
• Remove accumulated refuse and debris that gives rats harborage.
• Keep raw compost containing food in fully sealed, rodent-proof containers.
• Keep bird and squirrel feeders at least 5 feet above the ground.
• Maintain vegetation and stored materials so they don't become nesting cover.

Who is responsible for what

The code splits responsibility: property owners are responsible for structural deficiencies and significant nesting conditions — the holes, gaps, and access points rats use to get in. Occupants are responsible for the sanitation conditions they control. If a nuisance isn't corrected, the city can abate it and bill the property owner for the cost. There's no misdemeanor penalty — but an abatement bill plus a rat colony is the expensive way to learn the rules.

Already have rats? Do this in order

1. Cut the welcome mat. Secure food and garbage, pick up fallen fruit, clear debris and woodpiles near the house. Wear gloves and a mask if you clean an area with droppings.
2. Report the sighting. Central District Health's Treasure Valley Pied Piper program collects reports to map the problem — reporting helps your whole street.
3. Call a licensed professional for an active infestation. The city does not provide extermination services, and neither does the health district — both direct residents to licensed pest professionals. A colony in a crawlspace or attic is beyond snap traps: it needs removal, then exclusion (sealing), then cleanup.
4. Seal the structure. Because owners carry the structural responsibility, professional exclusion isn't just good practice — it's the part of the problem the ordinance assigns to you.