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Ada County, ID Parking Rules: EV Charging (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Trigger
Apartment/fourplex projects over 20 units
Governing section
Ada County Code 8-13E-4(B)(2)(d)
Companion amenities
5,000 sq ft grassy area, dog area, open space
Enforced by
Ada County Development Services plan review
Effective
Ordinance 1002, October 28, 2025
Applies only in
Spring Rock planned community, not countywide

Summary

In Ada County's Spring Rock planned community, apartment and fourplex developments with more than 20 units must install an electric vehicle charging station as a required site amenity. The mandate sits alongside a 5,000-square-foot common grassy area, a dog area with waste station, and connected open space, all reviewed through the county's development permit process.

City-specific rules exist: Boise has its own ev charging rules that differ from Ada County's county-level regulations. If you live in Boise, check the city-specific page instead.

2. In addition to the amenities listed above, all apartment and fourplex projects with more than twenty (20) units must provide the following amenities: a. At least one (1) common grassy area integrated into the site design allowing for general activities by all ages. Projects that provide safe access to adjacent public parks, without crossing an arterial roadway, are exempt from this standard. The common grassy area must be at least five thousand (5,000) square feet in area... c. Dog area with waste station. d. Charging station for electric vehicles.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Code current through: Ord. 1018, passed 3-24-2026).

Full Breakdown

Ada County Code Section 8-13E-4(B) sets design amenity standards for the Spring Rock planned community, a master-planned development in unincorporated Ada County administered under its own zoning article rather than the county's general Title 8 zoning code. Every apartment and fourplex project of more than eight units must supply crime-reducing landscaping and lighting plans plus secure bike and micro-mobility storage. Once a project passes twenty units, four additional amenities kick in: a common grassy recreation area of at least 5,000 square feet (waived only if the project already has safe park access without crossing an arterial road), open space accessible by pathway or visible from collector streets, a dog area with a waste station, and a charging station for electric vehicles.

None of these appear in Ada County's general zoning code; they exist only inside the Spring Rock Development Code, so a fourplex or apartment complex in Avimor, Hidden Springs, Dry Creek Ranch, or the rest of unincorporated Ada County has no comparable EV-charging amenity mandate. Developers submit these amenities as part of the site and master plan package reviewed by Ada County Development Services, and the Spring Rock design committee separately reviews architecture, landscaping, and site plans before the county issues approval. The requirement was adopted with Ordinance 1002 on October 28, 2025, as part of the county's recodification of the Spring Rock article.

No minimum number of charging stalls, connector type, or power level is specified; the section requires only that a charging station be included among the project's amenities.

Violations & Fines

The code sets no dollar fine for skipping the charging station. Instead, Ada County Development Services enforces Subsection B(2) by withholding site plan and zoning certificate approval for any qualifying apartment or fourplex application over twenty units that omits it. Applicants must also secure the Spring Rock design committee's sign-off on the full amenity package before the county will process the permit, so an incomplete plan set stalls or is returned for revision.

Frequently Asked Questions

Does every apartment building in Ada County need EV charging?
No. The requirement only applies inside the Spring Rock planned community, and only to apartment or fourplex projects with more than twenty units. Ada County's general Title 8 zoning code, which governs the rest of the unincorporated county, has no comparable countywide EV charging mandate for multifamily housing outside that development.
How many charging stations must a Spring Rock project build?
Section 8-13E-4(B)(2)(d) requires only that a charging station for electric vehicles be included among the project's amenities. It sets no minimum number of stalls, charging speed, or power level, leaving those details to the site plan the developer submits for county and design committee review.
What other amenities come with the EV charging requirement?
Projects over twenty units must also provide a common grassy area of at least 5,000 square feet, open space accessible by pathway or visible from collector streets, and a dog area with a waste station. Smaller Spring Rock projects, over eight units but under twenty, owe only crime-reducing landscaping, lighting, and bike storage.

Sources & Official References

Other rules in Ada County

All Ada County rules

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