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Builders - How to Apply for OSSF

Helpful Information:

  • It is recommended that a pre-construction planning meeting is held.
    During the planning meeting, permitting, separate plumbing requirements, licensed professionals required for OSSF, water reuse permits, industrial strength waste, irrigation systems, protection for sewer lines in parking areas and other common pitfalls are discussed. Contact us at 512.943.3330 to schedule a meeting.
  • To help builders navigate through the permitting agencies, a Commercial Contacts document is provided.
  • Commercial systems will have other permit requirements that may delay the application. For example, if within the Edwards Aquifer Recharge Zone, an authorization to construct the OSSF can’t be granted until the owner has an approved Edwards Aquifer Protection Plan with the TCEQ.
  • If site is within an ETJ or the city limits of a jurisdiction, there may be additional platting requirements. For example, the City of Georgetown and City of Taylor require all newly created lots less than five acres go through a platting process.

How to Apply on Behalf of a Residential Property Owner In-Person:

  1. Owner completes the 2018 OSSF Application Requirements Checklist and Owner Authorization Letter, and sends to Builder.
  2. Builder brings application, notarized owner affidavit, property deed, property survey and fees to Williamson County Engineer's office.

How to Apply by Mail if Owner is Unavailable:
A complete submittal of Part I of the checklist is required before the Williamson County Engineer's office can begin the application process. If the type of system is not known, we can get the application started with the minimum OSSF fees.

  1. Review the Instructions for Submitting an OSSF Application document before completing the forms.
  2. Complete and submit the 2018 OSSF Application.
  3. Complete and submit the 2018 OSSF Application Requirements Checklist.

How to Apply Electronically:

  1. Review the Instructions for Submitting an OSSF Application document before completing the forms.
  2. Complete and submit the 2018 OSSF Application.
  3. Complete and submit the 2018 OSSF Application Requirements Checklist.
  4. Submit the application and all attachments:
    • If the application and attachments are less than 15 MB in size the files may be emailed to our mailbox at ossf@wilco.org
    • If the application and attachments are greater than 15 MB in size the files may be transferred through an online portal here. Please contact an OSSF Staff Member at 512.943.3330 to obtain access to the online portal.