Stormwater and Watercourse Permits are required for activities that affect County-maintained stormwater systems, drainage facilities, and watercourses in unincorporated Alameda County. These permits help protect water quality, prevent flooding, and preserve natural waterways.
Apply for Stormwater Permit
Apply for Watercourse Permit
Forms & Documents
Contact Us
What Requires a Permit?
- Connecting a pipe or channel to a watercourse
- Modifying the natural flow of water
- Development within a watercourse setback
- Placing or removing material in a watercourse
- Constructing or modifying structures within a watercourse
- Stormwater treatment facilities
- Hydromodification management measures
- Stormwater BMP construction
Before You Apply
You’ll Need
- Determine whether your project requires a Stormwater or Watercourse Permit.
- Gather project plans and site information.
- Review permit requirements.
- Contact the Permit Center if you have questions.
Applications
Stormwater Permit Application
Stormwater treatment facilities and runoff management.
Watercourse Permit Application
Projects affecting channels and watercourse setbacks.
Fees
Permit fees and review costs vary by project.
Contact us for current fee information.
How to Apply
Determine Permit Needed
Identify whether a Stormwater or Watercourse Permit is required.
Prepare Documents
Prepare the permit application and gather required documents.
Schedule Appointment to Submit Application
Contact the Permit Center to schedule an appointment.
County Review
Staff reviews your application and project information.
Permit Issued
Receive your permit before beginning work.
Complete Required Inspections
Coordinate inspections throughout construction, if required.
Inspection Scheduling
Most Stormwater and Watercourse permits require inspections during construction. Requirements vary by permit.
Watercourse Inspections
Inspection Request Line: (510) 670-6451
Contact the inspection office before beginning work.
Forms & Documents
Requirements
Watercourse Protection Ordinance
Stormwater and Watercourse activities are regulated by:
Need Help?
Get help with applications, forms, inspections, and permit questions.
Location & Hours
399 Elmhurst Street, Room 141
Hayward, CA 94544
Monday – Friday
8:30 am – 4:30 pm