Accessory Structure Permit in Nampa, Idaho
Required for detached sheds, garages, barns, pole barns, and similar accessory structures on residential properties in Nampa when the structure exceeds 200 square feet. Structures of any size require a permit if hardwired with a 120V electrical system.
Verified 2026-06-29 · Source
When you need this permit
- Detached accessory structure exceeding 200 square feet requires a building permit
- Any structure hardwired with a 120V electrical system requires a permit regardless of size
- Structures under 200 sq ft with no electrical do not require a permit (confirm with Planning & Zoning re: setbacks and easements)
- Pole barn type structures require structural engineering by an Idaho-licensed engineer
- Standalone gazebo/pergola structures exceeding 200 sq ft require a permit
Required documents
- Req
Accessory Structure Permit Application & Checklist (Oct 2024)
Nampa's dedicated accessory structure application; available at cityofnampa.us/DocumentCenter/View/18803
- Opt
Pole Barn Handout
Nampa guidance for pole barn construction; available at cityofnampa.us/DocumentCenter/View/15867
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Accessory Structure — building permit (valuation-based) | Per Exhibit A valuation table; plan review is 65% of permit fee | Nampa Exhibit A Schedule of Permit Fees (Dec 2021) |
| Reinspection (after first reinspection for same item) | $55.00 flat fee | — |
Review timeline
7–7 business days
Nampa’s published plan-review target
Inspection process
- 1
Foundation / Footings
Accessory structures under 600 sq ft require minimum 12-inch depth on 12-inch wide footing (not full 24-inch frost depth). Larger structures require full frost-depth footings.
- 2
Final
Structure complete per approved plans
Tips
- Nampa's plan review target for residential accessory structures is 7 working days per the published Plan Review Processing Time Frames (Aug 2024).
- Garden sheds of 200 sq ft or less with no electrical do not require a building permit — but confirm setbacks and easements with Planning & Zoning.
- Accessory buildings under 600 sq ft are exempt from the full 24-inch frost-depth requirement; a 12-inch depth on a 12-inch wide footing is the minimum.
- Pole barn and post-frame structures require structural engineering by an Idaho-licensed engineer.
Frequently asked questions
- Do I need a permit for a shed in Nampa?
- No permit is required for a shed of 200 square feet or less that is not hardwired with a 120V electrical system. If the shed is over 200 sq ft, or if it will have hardwired electrical, a building permit is required. Always confirm setbacks with Planning & Zoning.
Sources & verification
Verified against official sources. Last reviewed 2026-06-29.
- Nampa Building Safety & Code Department — official building department
- Accessory Structure Permit Application & Checklist (Oct 2024)
- Residential FAQ — When do I need a permit? | City of Nampa
- Plan Review Processing Time Frames (Aug 14, 2024)
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Nampa building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
Other permits in Nampa
Get the AI compliance checklist
Upload your project scope, get a jurisdiction-specific checklist of everything you need. Coming soon.
We only use your email to send permit updates. No spam, unsubscribe anytime. Privacy.