Is there a regulation against storing inoperative motor vehicles?

Yes. All vehicles that are being repaired, dismantled, or incapable of operating are considered "inoperable" and must be stored out of public view, such as in the garage, when possible. It is considered a violation of the City Code if the vehicle or its parts become a hazard to the public health and safety. To report, contact the Neighborhood Improvement Division at 909-839-7030.


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1. What are business license requirements?
2. Garage and yard sales...what are the rules?
3. When and why do I need a building permit?
4. What are the rules for storage on my property?
5. How long may holiday lights be displayed?
6. Is there a regulation against storing inoperative motor vehicles?
7. I want to build an Accessory Dwelling Unit (ADU) on my property. What are the requirements and process?
8. Are short-term rentals allowed?
9. What is the Diamond Bar Zoning Map, and how can I see a copy?
10. Are there any programs available to help first-time homebuyers purchase a home?