NOTICE OF PUBLIC HEARING NOTICE IS HEREBY GIVEN BY THE CITY OF DIAMOND BAR, that the Planning Commission will conduct a public hearing on the following item to determine whether or not the subject request shall be approved under the provision of State law and the Diamond Bar City Code (DBCC). DATE AND TIME OF HEARING: PLACE OF HEARING: Tuesday, May 26, 6:30 P.M. (or as soon thereafter that the matter can be heard) Diamond Bar City Hall Windmill Community Room 21810 Copley Drive, Diamond Bar, CA 91765 You can participate in the meeting by visiting the City's website at https://www.diamondbarca.gov/agendas, select the May 26, 2026 Planning Commission Meeting and click on Agenda. The first page of the agenda provides detailed instructions on how to observe or participate in the meeting remotely. To listen only, dial the phone number and enter the access code provided on the agenda. To listen and provide public comment, join the webinar using the link posted on the agenda. You may also call the Community Development Department at (909) 8397030. Written comments may also be submitted in advance of the hearing via email to Planning@DiamondBarCA.gov and indicate in the Subject Line FOR PUBLIC COMMENT. Please note that the meeting will proceed in the Windmill Community Room. If you wish to make certain that your comments are heard, please attend the meeting in person or send an email by 4:00 p.m. on the day of the meeting, should comments by teleconferencing become infeasible due to an Internet outage, power outage, or other technical issue that may occur outside of the City's control. SUBJECT: Development Review Planning Case No. PL202547 ("Project") REQUEST: Under the authority of DBCC Section 22.48, the property owner, Na Dong, and applicant, Alan Gao, are requesting Development Review approval to remodel the exterior and construct a 1,647 squarefoot firstfloor addition, a 119 squarefoot front entry porch, and an interior remodel to an existing 2,248 squarefoot onestory singlefamily residence on a 42,689 gross squarefoot (0.98 gross acre) undeveloped lot. The property owner and applicant concurrently propose the construction of a 798 squarefoot, attached Accessory Dwelling Unit (ADU). Although it is depicted on the project plans, the attached ADU is permitted by right, and is not subject to Planning Commission review. The subject property is zoned Rural Residential (RR) with an underlying General Plan land use designation of Rural Residential. PROJECT ADDRESS: 2867 Shadow Canyon Drive, Diamond Bar, CA 91765 (APN: 8713018035) APPLICANT: Alan Gao, 17795 Neff Ranch Road, Yorba Linda, CA 92886 PROPERTY OWNER: Na Dong, 17795 Neff Ranch Road, Yorba Linda, CA 92886 ENVIRONMENTAL DETERMINATION: The project has been reviewed for compliance with the California Environmental Quality Act (CEQA). Based on that assessment, the City has determined the project to be Categorically Exempt from the provisions of CEQA pursuant to Article 19 under Section 15301(e) (additions to existing structures) of the CEQA Guidelines. No further environmental review is required. Published in: San Gabriel Valley Tribune: Friday, May 15, 2026 If you are unable to attend the public hearing, but wish to send written comments, please write to the City of Diamond Bar Community Development Department/Planning Division at the address given below. To preview case materials or for further information on this subject, please contact Assistant Planner, Rudy Lopez, at (909) 8397034. If you challenge this application and project in court, you may be limited to raising only those issues you or someone else raised at the public hearing described in this notice, or in written correspondence delivered to the Planning Commission at, or prior to, the public hearing. CASE MATERIALS are available for review between, the hours of 7:30 a.m. and 5:30 p.m. Monday through Thursday and 7:30 a.m. to 4:30 p.m. on Friday, at the Community Development Department/Planning Division, 21810 Copley Drive, Diamond Bar, CA 91765. San Gabriel Valley Tribune Published: 5/15/26