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Nampa, ID Building Setbacks & Zoning: Lot Coverage Limits (2026)

Few Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Max lot coverage, RS district
None specified
Max coverage, other zones
None specified citywide
Accessory structure footprint cap
Cannot exceed principal footprint
Accessory buildings per lot
Two, single-family
Governing title
Title 10, Planning and Zoning

Summary

Nampa's zoning code leaves maximum property coverage unspecified for principal structures in the RS single-family district and every other zoning district, so there is no citywide percentage cap on lot coverage or impervious surface.

10-8-6. - Maximum property coverage. None specified for primary structures. For accessory structures refer to section 10-1-7.D.3.

View official code

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's Title 10 zoning code, adopted under the Idaho Local Land Use Planning Act, sets no maximum lot-coverage percentage or impervious-surface limit for principal structures in any district. The "Maximum property coverage" section for the RS single-family district reads "None specified," and the identically titled section repeats "None specified" in the AG, RA, RD, RML, RMH, HC, BN, BC, IL and IH chapters. The only coverage-related restriction applies to detached accessory structures: their footprint cannot exceed the footprint of the principal structure, and a single-family lot is limited to two accessory buildings. Required yard setbacks, not a coverage percentage, are what actually constrains how much of a lot can be built on.

Violations & Fines

There is no coverage-percentage violation to enforce since Nampa sets no cap; the Planning and Zoning Division instead enforces yard-setback encroachments and accessory-structure footprint or building-count violations as ordinary zoning code violations.

Frequently Asked Questions

Does Nampa cap how much of my lot I can build on?
No. Nampa's zoning code lists "None specified" for maximum property coverage in every district, including RS single-family, so there is no percentage limit on building footprint or impervious surface.
Are there any coverage-type limits at all?
Only for detached accessory structures: their footprint can't exceed the principal building's footprint, and single-family lots are capped at two accessory buildings under section 10-1-7.D.3.

Sources & Official References

Other rules in Nampa

Setback RulesSome RestrictionsStructure Height LimitsSome RestrictionsFence Regulations: Fence Permit RequirementsSome RestrictionsPublic Conduct: Skateboarding RulesSignificant RestrictionsPublic Conduct: Public UrinationSome RestrictionsPublic Conduct: Loitering RulesSome RestrictionsPublic Conduct: Aggressive PanhandlingSignificant RestrictionsBusiness Licensing & Operations: Tattoo & Body ModificationSome Restrictions

All Nampa rules

Compare Nampa to another location·View the Idaho building setbacks & zoning overview

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