Caldwell, ID Building Setbacks & Zoning: Structure Height Limits (2026)

Caldwell City Code Section 10-05-04's Table 10-05-04 sets maximum building height under the 'Scale and Massing' heading for each residential zoning district: 45 feet in RS-1, 45 feet in RS-2, 30 feet in R-1, 40 feet in R-2 and 45 feet in R-3. Footnote 4 to the table adds a proximity-based override that applies regardless of the base zoning district: if a new mixed-use, multi-family, or non-residential structure is built immediately adjacent to a single-family residence, its maximum height drops to 30 feet unless the applicant obtains special use permit approval to exceed it.

The code defines 'immediately adjacent' for this purpose as within 150 feet, measured from structure to structure, so the override reaches beyond an adjoining lot line into nearby parcels. The same section's footnote 1 lets qualifying Conservation Area Development projects in RS-1 and RS-2 use the R-1 height limit of 30 feet along with reduced lot sizes, provided buildable lots are at least 6,000 square feet with 50 feet of frontage. Height is one of the bulk and dimensional standards Section 10-05-04 groups with lot size, coverage, scale, massing and setbacks, and subsection (2) requires new construction to meet the dimensional standard schedule in effect when the building permit was filed, unless an alternate height schedule was approved through a planned unit development, development agreement or other planning application.