Boise's Zoning Overlays & Bonuses: The Rules That Matter

Every city handles zoning overlays & bonuses a little differently. In Boise, Idaho, there are 2 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Downtown Design Guide

Boise requires multi-family, mixed-use, and nonresidential projects in the Downtown Planning Area to comply with the adopted Downtown Design Standards and Guidelines, layered on top of the Development Code's own Chapter 11-04 standards, under Boise City Code section 11-04-02.

Key details: Governing section: Boise City Code § 11-04-02. Applies to: Multi-family, mixed-use, nonresidential in Downtown Planning Area. Outside downtown: Citywide Design Standards and Guidelines apply instead. Conflict rule: Planning Director picks higher visual quality standard. Adopted: Ord. 27-23, eff. 12-1-2023.

Section 11-04-02 itself sets the applicability trigger rather than a standalone penalty; noncompliance is enforced through the development review process it points to. A Multiple-Family, mixed-use, or nonresidential project inside the Downtown Planning Area that does not incorporate the mandatory content of the Downtown Design Standards and Guidelines cannot receive the required Minor Design Review, Major Design Review, or Zoning Certificate of Compliance sign-off from Planning and Development Services, which blocks issuance of a Building Permit until the design is revised. Where the Chapter 11-04 text and the Downtown or Citywide guidelines conflict, the Planning Director decides which standard controls by picking the one requiring the higher level of visual building quality, so applicants cannot self-select the easier standard.

Density Bonus Law

Boise grants extra dwelling units in the Foothills Planning Area when developers set aside open space, using a sliding formula table.

Key details: Governing section: BCC § 11-04-05.6. Applies to: Foothills Planning Area, Hillside Overlay. Bonus range: 0.5 to 4.0 units/acre. Min open space parcel: 1 acre, 30-ft avg width. Approval body: Planning and Zoning Commission.

Density bonus units require Planning and Zoning Commission review of the open-space set-aside and design standards; developments that don't meet the eligible open-space criteria are capped at base zoning density with no bonus.

The Bottom Line

Boise's zoning overlays & bonuses rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Boise is broadly strict or permissive.

These rules come from Boise's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.