Ada County, ID Parking Rules: Overnight Parking (2026)

Ada County Code section 6-5-3, part of the county's Residential Parking chapter, bars parking specific categories of vehicles on the street in any residential area of unincorporated Ada County for more than two hours: any vehicle or trailer with a gross weight capacity over 12,000 pounds, any trailer or mobile home of any type, any vehicle designed or used primarily as farm equipment, and recreational vehicles generally. Motor homes, travel trailers, and camp trailers get a specific carve-out in subsection A(4)(a): they may sit on a residential street for up to 72 hours, whether or not they remain hitched to a tow vehicle.

Separately, subsection B imposes a blanket seven-day limit: no vehicle of any kind, including an ordinary passenger car, may occupy a spot on a residential street in unincorporated Ada County for a continuous period longer than seven days. Section 6-5-4 exempts vehicles parked to load or unload passengers or freight while the loading is actually happening, vehicles parked incident to a lawful nearby construction project, and vehicles parked within 100 yards of a lawful commercial operation for a purpose incident to that business. Penalties escalate the longer a violation continues: section 6-5-5 sets a base fine of $50 per vehicle per violation, and if a heavy vehicle, trailer, mobile home, or RV overstays its two-hour or 72-hour window under subsection 6-5-3A, every additional 24-hour period counts as a new, separately fined violation.

A vehicle that overstays the seven-day rule under subsection 6-5-3B is fined again for every additional seven-day period. The Ada County Sheriff's Office enforces the chapter under section 6-5-6, and any vehicle parked in violation may be cited, towed, and stored at the owner's expense.