How to Submit Outside Service Area Agreement (OSAA) and Annexations Applications Electronically

To request public sewer service for a property located outside of the service area of a County sanitation district or zone.

If you need assistance determining which forms and materials are required, please send us an email: PermitSonoma-Sanitation@sonoma-county.org

1. Account Registration

Ensure you are registered for a Permits Online account.

Before you can apply for your permit:

1. Register for a Permits Online account if you do not have one already.
2. Make note of the email address you use to log into your Permits Online account, and provide it to Permit Sonoma staff in Step 3 below.

A Permits Online account is needed so you can check the status of your permits, pay permit fees, schedule inspections, etc.

2. Ensure You Have a Complete Application

Outside Service Area Agreement (OSAA) and Annexations

Ensure you have a complete application. Submitted documents must be in PDF format:

1. Review SAN-004 Outside Service Area Sewer section for the required application materials for each type of permit.

3. Application Submittal

Send application materials to:
PermitSonoma-Sanitation@sonoma-county.org

1. Application and detailed site plan must be uploaded as PDF attachments when applying. All other required documents must also be submitted as PDF attachments.
2. In the subject line of the email include the property address or parcel number and type of sewer permit application.
3. Provide the email address you use to log into your Permits Online Account. (See Step 1 above.)
4. If the application is determined to be complete for submittal, you will receive an email with an invoice for the required application fees.
5. If the application is incomplete for submittal, you will be notified of the required revisions or missing materials.

4. Fee Payment

Pay for the application online.

1. An application will be considered accepted upon receipt of payment.
2. Once you receive the application invoice, please visit our online permitting website and
   1. Select ‘Pay Fees’ on the home page.
   2. Enter the Record Number and select ‘Search’.
   3. Select the ‘Payments’ Tab at the top and then ‘Pay Fee’ on the right side of the invoice line.
   4. Follow the instructions from there.
3. Please email PermitSonoma-Sanitation@sonoma-county.org to notify us that you have paid.