On-Site Sewage Facility

  • Information: An on-site sewage facility construction permit is required for all installations, extensions, repairs, and alterations. See also Outline of City of Denton OSSF Permit Procedures (PDF).
  • Submittal Requirements:
    • A notarized On-Site Sewage Facility Permit Application form (PDF)
    • On-Site Sewage Facility plan prepared by either a Professional Engineer or Registered Sanitarian
    • Site evaluation and soil analysis prepared by either a Professional Engineer or a licensed Site Evaluator; and all applicable Affidavits to the Public.
  • Electrical Permits are also required when an electrical sub panel is to be installed to serve an on-site sewage facility for an existing building.
  • Affidavits to the Public are required pursuant to Title 30, Texas Administrative Code, Chapter 285, for the following on-site sewage facilities:
    • Affidavit to the Public Secondary treatment Surface Irrigation
    • Affidavit to the Public Septic Tank Treatment with Evaportranspiration Drainfield
    • Affidavit to the Public Secondary Treatment with Standard Absorptive Drainfield
    • Affidavit to the Public Secondary Treatment with Leaching Chamber Drainfield
    • Affidavit to the Public Secondary Treatment with Gravel less Pipe Drainfield
    • Affidavit to the Public Secondary Treatment with Filter and Drip Emitter Drainfield
    • Affidavit to the Public Secondary Treatment with Low Pressure Dosing Drainfield
    • Affidavit to the Public Secondary Treatment with Absorptive Mound Drainfield
    • Affidavit to the Public Non-Standard Treatment with Surface Irrigation Drainfield
    • Affidavit to the Public Holding Tanks
  • Plans: Submit to the Department of Environmental Services and Sustainability.
  • Fees: 
    • New construction aerobic treatment (Permit fee $500)
    • New construction non-aerobic treatment (Permit fee $300)
    • Repair or alterations (Permit Fee $200)

Helpful Documents

  1. Affidavit to Public Two or More On-Site Sewage Facilities Located on Separate Legal Tracts (PDF)
  2. Affidavit to the Public Evapotransportation On-Site Sewage Facility (PDF)
  3. Affidavit to the Public Surface Irrigation On-Site Sewage Facility (PDF)
  4. Template for an Affidavit to the Public (PDF)