What are Non-Conforming Uses?
Non-conforming uses in unincorporated Marin County are those uses which are inconsistent with the County Zoning Code. Some non-conforming uses are considered legal because they were established at a time when they were permitted by the County Code. Other non-conforming uses have never been allowed by the County Code and are not considered legal. Legal non-conforming uses may continue provided they are not expanded and no structural alterations are made to legal non-conforming buildings that exceed 25% of the building’s appraised value as calculated by the County Assessor.
