Minor one-story addition - Exception for same side setback as existing structure.
San José Municipal Code § 20.30.310
in effectOne-story additions, including Accessory Dwelling Units, may be erected with the same side setback as an existing structure subject to the following restrictions: A. No such addition shall reduce, or further diminish a nonconforming setback. B. The total square footage of the proposed encroachment into the nonconforming side setback shall be no more than the square footage of the existing areas encroaching within the nonconforming Side Setback Area or one hundred fifty (150) square feet in area, whichever is less. C. Said addition is a single-Story addition and shall not exceed twenty (20) feet in height. D. Only one such addition shall be Permitted. (Ords. 26248, 29011, 29821, 30353.)
Source: San José Municipal Code (Municode library)URL: https://library.municode.com/ca/san_jose/codes/code_of_ordinancesFetched: 7/25/2026