Tres Hermanos Ranch

Tres Hermanos Ranch is 2,445 acres: 1750 acres in the City of Chino Hills and 695 acres in the City of Diamond Bar.  

Find Your District

Residents can look up their district by using an interactive map online.  Learn More About Districts

Please follow these directions:

• Single-Family Homes: enter street address in search box.
• Condominiums: enter street address in search box...

Passport Services

Did you know that the City of Chino Hills is a Passport Acceptance Facility? Walk-in service is available, for limited hours Monday through Thursday, however, not guaranteed. For added convenience, book your appointment online today!Read More...

2018 Water Rate Study, Budget-based Water Rates, and the Prop 218 Process

An extensive process has been underway at various public meetings to review and discuss changing the structure of the City’s water rates to budget-based tiers, and to set the proposed amounts charged, based on system costs.  Find about ...Read More...