Meridian ADU Guide

One accessory dwelling unit is permitted per lot in residential zoning districts where single-family dwellings are allowed as a permitted use.

The gross floor area of an accessory dwelling unit shall not exceed 900 square feet or 50% of the gross floor area of the primary dwelling, whichever is less.

Accessory dwelling units shall comply with the setback requirements of the underlying zoning district for accessory structures. Detached ADUs shall maintain a minimum 5-foot setback from rear and side property lines. Attached ADUs shall comply with primary dwelling setback requirements.

One off-street parking space is required per accessory dwelling unit. The parking space may be provided in tandem configuration or as on-street parking where allowed by the City Engineer. No additional parking is required for ADUs located within one-half mile of a public transit stop.

No owner-occupancy requirement is imposed for accessory dwelling units. Either the primary dwelling or the accessory dwelling unit may be rented, or both may be rented, provided the property owner maintains compliance with all applicable building and zoning codes.

Accessory dwelling units shall be architecturally compatible with the primary dwelling. Exterior materials, roof pitch, and window proportions shall be consistent with or complementary to the primary dwelling. The Planning Director may waive design compatibility requirements for ADUs not visible from public rights-of-way.