Nampa, ID Building Safety: Building Permits (2026)
Key Facts
- Permit required
- Any structure, no size exemption
- Governing sections
- § 4-2-3 and § 4-2-2
- Sidewalk/driveway exemption
- Under 30 inches above grade only
- Unpermitted-work penalty
- Investigation fee equals permit fee
Summary
Nampa requires a building permit to erect any deck, patio structure, or other structure under its general permit law, and the city's exempt-work list omits any deck-specific size or height carve-out.
It is unlawful for any person, firm or corporation to erect, construct, enlarge, alter, repair, improve, remove, convert, demolish, or install any building, structure, or manufactured/mobile home without first obtaining a building permit... Permits shall not be required for the following: 1. Building: One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided the floor area does not exceed 200 square feet... 5. Sidewalks and driveways not more than 30 inches (762 mm) above adjacent grade...
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 16 Update 1).
Full Breakdown
Nampa City Code § 4-2-3 makes it unlawful to erect, construct, enlarge, alter, repair, improve, remove, convert, demolish, or install any building or structure without first obtaining a building permit from the building official. The city's amended exempt-work list at § 4-2-2 (IBC/IRC § 105.2) covers only small tool sheds under 200 square feet, low retaining walls, small water tanks, sidewalks and driveways under 30 inches high, above-ground pools, and similar minor items: decks and patios are not on that list, so any raised wood deck or attached patio structure needs a permit before work begins, regardless of size.
Violations & Fines
Building without a required permit triggers a special investigation fee under § 4-1-13 equal to the permit fee, plus a possible stop-work order and permit revocation.
Frequently Asked Questions
Do I need a permit for a small deck in Nampa?
Is a concrete patio slab exempt like a sidewalk?
Sources & Official References
Other rules in Nampa
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