Boise, ID Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Boise, ID, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Front-yard placement
- Barred without conditional use permit
- Setback rule
- No encroachment into front/street-side setback
- Alley-loaded carports
- Under 1,000 sq ft may reach alley line
- Building permit exemption
- One-story, 200 sq ft or less
- Enforcement
- Misdemeanor, separate offense per day
Summary
Detached carports in Boise can't sit in front of the house or encroach into front and street-side setbacks without a conditional use permit, though one-story carports under 200 square feet skip a building permit entirely.
No detached accessory building or structure shall occupy any area in front of the primary building, unless approved by the Planning and Zoning Commission as a conditional use permit. However, on lots that have topographical or other physical constraints, the Planning Director may approve a detached accessory building or structure in front of the primary building.
ii. Regardless of their size, detached accessory buildings shall not encroach into required street side or front yard setbacks.
iii. Maximum setbacks do not apply to accessory buildings.
iv. Accessory structures such as decks and patios that are one foot or less in height as measured from the property's finished grade, may occupy any setback area.
v. Open post patio/shade covers, pergolas, and similar structures under 250 feet in area and less than 15 feet in height and attached to the home, may have rear yard setbacks of nine feet. Interior side yard setbacks shall be per the zoning district. For corner lots, a minimum 15-foot street-side yard setback is required. Structures that use these reduced setbacks shall not occupy more than 50 percent of the lot's rear yard widths.
vi. In-ground pools that are one foot or less in height, as measured from the property's finished grade, may occupy any rear or interior side yard area, provided a minimum three-foot setback is maintained from the
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-31: Code current through: Ord. 20-26, passed 6-9-2026).
Full Breakdown
Boise's Development Code treats a detached carport as an accessory structure: it can't occupy any area in front of the primary house, and regardless of size it can't encroach into the required front or street-side yard setback, unless the Planning and Zoning Commission approves a conditional use permit (Boise City Code § 11-03-03.1.B(3)(c)). Alley-loaded carports under 1,000 square feet and 22 feet tall may be built right to the property line on the alley. Separately, under the City's adopted residential building code, a one-story detached carport of 200 square feet or less is exempt from a building permit (§ 9-1B-8, IRC R105.2); larger or attached carports need one.
Violations & Fines
Zoning Code violations, including unpermitted setback encroachments, are misdemeanors under Boise City Code § 1-4-1; each day a violation continues counts as a separate offense enforced by Code Compliance.
Frequently Asked Questions
Does a carport in Boise need a building permit?
Can I build a carport in my Boise front yard?
Sources & Official References
Other rules in Boise
How Boise compares: Shed Permit Requirements by City·Compare Boise to another location·View the Idaho accessory structures overview
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