Outside the reach of sewer lines, a house in Osceola County needs an onsite sewage treatment and disposal system, the formal name for a septic system. The excavation is the tank hole and the drainfield, but the permit comes first.

Who issues the permit
Florida moved its onsite sewage program from the Department of Health to the Department of Environmental Protection effective July 1, 2021. DEP's permitting FAQ says DEP itself now issues permits in Northwest Florida and Marion County, while county health departments still issue them elsewhere. Check DEP's FAQ to confirm who handles Osceola County before you apply.
What the application needs
For counties still handled by the health department, DEP's FAQ lists:
- The application, a site plan and a building floor plan
- The fee, set by the county health department based on system type and services
- A site evaluation of the soil, terrain and other conditions, done by a qualified professional; the health department can do it for a fee
DEP notes that many counties have local ordinances stricter than the state rules.
Planning the dig
- Place the pool, driveway and any outbuildings around the approved tank and drainfield.
- Keep heavy equipment off the drainfield area during clearing and grading.
- Request Sunshine 811 marks before the dig.
Sources
- Florida Department of Environmental Protection: Onsite Sewage Program Transfer
- Florida Department of Environmental Protection: Onsite Sewage FAQ, Permitting
- Sunshine 811: Get started, create a ticket
Reviewed October 20, 2026. Rules, prices and contacts change, so check the source before relying on it.
Questions and answers
What does a septic permit need in Florida?
In counties where the health department handles permits, DEP lists an application, site plan, floor plan and fee, plus a site evaluation by a qualified professional.
Get your septic dig quoted
Ring the number or use the form, and a contractor working in Osceola County follows up. Quotes cost nothing.
If the call goes to voicemail, say your name, number, where the property is and what needs doing.