Cal. Government Code § 65658.6

(a) An adaptive reuse project that satisfies the requirements of Section 65658.5 may include the development of new residential or mixed-use structures on undeveloped areas and parking areas located on the same parcel as the proposed repurposed building, or on the parcels adjacent to the proposed adaptive reuse project site if all of the following requirements are met: (1) The adjacent portion of the project complies with the requirements of any of the following: (A) The requirements of paragraphs (5) and (8) of subdivision (a) of Section 65913.4. (B) The requirements of the Affordable Housing and High Road Jobs Act of 2022 (Chapter 4.1 (commencing with Section 65912.100)), including the labor standards for construction workers in the act. (C) The requirements of the Middle Class Housing Act of 2022 (Section 65852.24), including the labor standards for construction workers in the act. (2) The adjacent portion of the project is located on a parcel that satisfies the requirements specified in subparagraphs (A) and (B) of paragraph (2) of subdivision (a) of Section 65913.4. (3) The adjacent portion of the project is located on a parcel that satisfies the requirements specified in paragraph (6) of subdivision (a) of Section 65913.4, exclusive of clause (iv) of subparagraph (A) of that paragraph. (4) The adjacent portion of the project is located on a parcel that satisfies the requirements specified in paragraph (7) of subdivision (a) of Section 65913.4. (5) The applicant and local agency comply with the requirements of subdivision (b) of Section 65913.4. (6) Any existing open space on the proposed project site is not a historic resource. (b) The adjacent portion of the project shall be eligible for a density bonus, incentives or concessions, waivers or reductions of development standards, and parking ratios pursuant to Section 65915.