Summary of Nampa City Code Title 10 RD / RM districts as it applies in Nampa. Reference: https://library.municode.com/id/nampa/codes/code_of_ordinances.
Code evolves continuously. Verify at the official source (https://library.municode.com/id/nampa/codes/code_of_ordinances) before any development decision.
Applicable code
Code references active as of publication. Verify current standards at the official source before any development decision.
Two-family dwellings (duplexes) are permitted as a primary use in the RD Two-Family Residential District and may be permitted in other residential districts subject to conditional use or planned unit development approval.
Investor implication: Duplexes are permitted by right in RD zones; acquisition in RS or other single-family zones requires conditional use approval, adding time and uncertainty to entitlement.
Minimum lot area for two-family dwellings in the RD district is 6,000 square feet.
Investor implication: Lot size minimums determine feasibility on infill parcels; verify current standard before acquisition.
Setback requirements for two-family dwellings in the RD district: front setback 20 feet, side setback 5 feet (each side), rear setback 20 feet.
Investor implication: Setbacks determine buildable envelope and unit size; tighter setbacks reduce developable area and may force smaller unit layouts.
Two off-street parking spaces are required per dwelling unit for two-family residential use.
Investor implication: Parking requirements consume lot area and drive site development costs; parcels with limited depth may not accommodate required spaces plus building footprint.
Maximum building height for two-family dwellings in the RD district is 35 feet. Maximum lot coverage is 60 percent.
Investor implication: Height and coverage limits cap unit size and density; parcels with high coverage allowances support larger units or additional accessory structures.
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