Town Center Specific Plan

Updated: June 5, 2023

Next Steps

As part of the California Environmental Quality Act (CEQA) process, the City is hosting a public scoping meeting on Thursday, June 8. The purpose of this meeting is to obtain public input on the scope of environmental issue areas that should be addressed in the Supplemental Environmental Impact Report (SEIR).

What: Public Scoping Meeting for the Diamond Bar Town Center Specific Plan for the Supplemental Environmental Impact Report (SIR)

When: Thursday, June 8, 2023 | 6-7 p.m.

Where: Windmill Room, Diamond Bar City Hall |21810 Copley Drive

Why Attend:

  • Get an update on the progress of the development of the Specific Plan 
  • Learn about the environmental scoping process
  • Visit information stations focusing on the environmental issue areas that are going to be analyzed as part of the SIR 
  • Ask questions and/or provide comments

Environmental Documents

The Initial Study found that nine (9) environmental issue areas would have the potential to result in significant impacts requiring further analysis in the draft Supplemental EIR: 

  1. Aesthetics
  2. Air Quality
  3. Greenhouse Gas Emissions
  4. Hydrology/Water Quality
  5. Noise
  6. Public Services
  7. Recreation
  8. Transportation
  9. Utilities/Service Systems

Public Review Period

The 30-day public review period for the Supplemental Environmental Impact Report for the Diamond Bar Town Center Specific Plan starts June 5, 2023 and ends July 5, 2023.  Under CEQA, this period is an early and open process for determining the scope of issues to be addressed in the environmental document, intended to identify the range of issues pertinent to the proposed project and feasible alternatives or mitigation measures to avoid potentially significant environmental effects.

Previous Meetings

Community Meeting to Provide Update on Town Center Specific Plan Scheduled for March 22, 2023 - Residents are invited to a community meeting on Wednesday, March 22 to learn about the progress to date on the creation of Diamond Bar’s first Town Center Specific Plan.

This informational meeting will take place from 6 to 7:30 p.m. at the Diamond Bar Center, 1600 Grand Avenue. It is open to the public and does not require registration.

Joint Meeting of the City Council and Planning Commission - The Diamond Bar Town Center Specific Plan will be the topic of discussion at a Joint City Council and Planning Commission meeting slated for 5:30 p.m. on Tuesday, January 24 at the Diamond Bar City Hall in the Windmill Room. Note: New location than originally announced.

Community Charrette/Design Workshop - The in-person workshop took place August 22-26, 2022. During the week, community members had the opportunity to discuss the project area with the design team, review current conditions and provide input on the elements they would like included in the final concept. The results will be presented at a workshop in early 2023.


In December 2019, the City Council adopted a comprehensive update to its General Plan, establishing a new vision for a pedestrian-oriented "Town Center," that provided housing opportunities, food-oriented retail, restaurants, and entertainment.

The Town Center plan designates 45-acre commercial area along Diamond Bar's main thoroughfare—Diamond Bar Boulevard between Golden Springs Drive and the SR-60 overpass—as the Town Center Mixed Use Focus Area.

 In April 2021, the City enlisted the assistance of the Urban Land Institute-Los Angeles (ULI-LA) to commence a technical assistance panel (TAP) to gain a better understanding of the market possibilities, implementation strategies, and design frameworks to consider as it plans the Diamond Bar Town Center. The vision presented included the challenges and benefits to the community of a project of this scope and cost.


Contact the Community Development Department at (909) 839-7030 or 

Additional Information