10.64.020   Modifications or Expansions of Nonconforming Structure.
   A.   Additions. A nonconforming structure may be added to, provided that the addition complies with all requirements of this Zoning Code, including but not limited to setbacks, building height, parcel coverage, and parking. However, the following modifications and expansions may be allowed without requiring conformance with established standards.
      1.   Single-family dwelling units that have nonconforming parking may be expanded to include additional square footage to the unit. However, where a new bedroom is proposed to be constructed, at least one additional parking space shall be provided.
      2.   Where a side yard setback is nonconforming, an addition to a structure with such nonconformity shall be allowed to maintain the nonconforming setback, provided any such addition does not, as determined by the Director, create any adverse impact on an adjoining property.
      3.   For any use other than a single-family residence, an expansion of up to 10 percent of the existing floor area may be allowed without any requirement to establish conformity of required setbacks, landscaping, structure height, loading spaces, or open space standards. However, additional parking spaces shall be required for any such addition to meet the requirements of this Title 10 for the additional floor area.
      4.   Conformance with minimum required landscape standards shall not be required for any addition or expansion.
   B.   Maintenance and Repair. General maintenance and repair of a nonconforming structure shall be allowed, provided there are no structural alterations. However, structural alterations which the Building Official has determined to be necessary for public health and safety purposes may be allowed.
   C.   Removal of Nonconformity during Modification or Expansion. In any instance where an existing nonconforming structure or any portion of a nonconforming structure is demolished in the course of maintenance and repair, expansion or addition, or other alteration or modification, all nonconforming portions of the structure so demolished shall be reconstructed in compliance with the applicable regulations of the zone for height, setback, yard, parcel coverage, and other applicable provisions of this Zoning Code. (Ord. 935 § 3 (part), 2015)