Bonneville County, ID Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- R-P Zone cap
- 40% of lot, structures only
- R-1 Zone cap
- 40%, § 156.253
- R-1.5 / RA-3 cap
- 80% including paving
- Attached unit cap
- 65% interior, 50% corner lots
Summary
In the R-P Residence Park Zone, Bonneville County limits the total area covered by structures to 40% of the lot; the R-1 Residence Zone carries the identical 40% cap, while the denser R-1.5 and RA-3 zones allow up to 80% including paved surfaces.
LOT COVERAGE. The total area of structures on a lot shall not exceed 40%.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-1: Ordinance 280-26, passed 1-20-2026).
Full Breakdown
233, titled "Lot Coverage," states flatly that "the total area of structures on a lot shall not exceed 40%" in the R-P Residence Park Zone, the low-density district characterized by larger residential lots. 253 for the R-1 Residence Zone, showing the county treats its two lower-density residential zones the same way for building footprint. 293 for the RA-3 Zone both allow lot coverage, defined there to include all area under roofs plus paved or concrete surfaces, up to 80% of the total lot and parking area, with a separate 65% cap for single-family attached units on interior lots and 50% on corner lots, and the remaining area required to be landscaped.
5/RA-3 80% figure sweeps in driveways and parking too, so the two coverage regimes are not directly comparable percentage-for-percentage. A homeowner in the R-P Zone adding a garage or addition needs to keep the running total of all structures on the lot, house included, at or under 40% of the parcel's area to stay in compliance without a variance.
Violations & Fines
Building coverage beyond the 40% cap in the R-P or R-1 zones, or beyond the applicable 80%/65%/50% tiers in the R-1.5 and RA-3 zones, without an approved variance is a zoning infraction enforceable by the Zoning Administrator under the code's general penalty provisions.
Frequently Asked Questions
What is the lot coverage limit in Bonneville County's R-P zone?
Are driveways counted in the 40% coverage limit?
Can I exceed the coverage cap with a variance?
Sources & Official References
Other rules in Bonneville County
Compare Bonneville County to another location·View the Idaho building setbacks & zoning overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.