Boise, ID Environmental Rules: Erosion Control (2026)
Key Facts
- Enforcing agency
- Boise building official
- Permit needed for
- Most excavation, fill, or grading
- Exemptions
- 9 listed, e.g. fills under 1 ft
- Fees
- Set by City Council fee schedule
- Bond
- May be required for corrective work
Summary
Boise requires a grading permit under the city's building code before altering land contours, unless the work falls into one of nine listed exemptions such as small fills or utility trenching.
J103.2 Exemptions. A grading permit shall not be required for the following: 1. Grading in an isolated, self-contained area, provided there is no danger to the public, and that such grading will not adversely affect adjoining properties. 2. Excavation for construction of a structure permitted under this code. 3. Cemetery graves. 4. Refuse disposal sites controlled by other regulations. 5. Excavations for wells or trenches for utilities.
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 building official administers grading permits under Appendix J of the adopted IBC (BCC §§ 9-1A-82 through 9-1A-100). Anyone regrading, excavating, or placing fill on private or public property needs a permit and plan review unless the work fits a listed exemption: isolated grading with no public danger, footing excavation for a permitted structure, cemetery graves, regulated mining or quarrying, utility trenches, exploratory excavation by a design professional, or fills under one foot deep. Permitted grading carries plan-review and permit fees set by the City Council's fee schedule, and the building official can require a bond to guarantee corrective work and can order repair of any excavation, embankment, or fill that becomes a safety hazard or threatens a public way or drainage channel.
Violations & Fines
Grading without a required permit violates the building code; the building official can issue stop-work orders, require corrective bonds, and demand repair or elimination of hazardous excavations, fills, or embankments.
Frequently Asked Questions
Do I need a permit to regrade my Boise yard?
What if grading affects a drainage channel?
Sources & Official References
Other rules in Boise
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