Florida Septic Permits: What’s Required and When

In Florida, you need an approved permit before you construct, repair, modify, abandon, or, in some cases, operate an onsite sewage treatment and disposal system (OSTDS), the technical name for a septic system. This isn’t a local courtesy step. It’s a statutory requirement under Florida law, and skipping it can leave a homeowner with an unpermitted system that complicates repairs, resale, and financing down the road.

Septic systems in Florida are regulated under Florida Administrative Code Chapter 64E-6, Standards for Onsite Sewage Treatment and Disposal Systems. Historically, permitting and inspection were handled entirely by county health departments under the Florida Department of Health. As of January 2, 2025, the Florida Department of Environmental Protection (DEP) took over direct permitting in 16 counties, while the remaining counties, including Polk County, continue to have their permits issued through the local Department of Health environmental health office (Florida Department of Health).

Who issues the permit where you live

The 16 counties where DEP now issues OSTDS permits directly are Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf, Holmes, Jackson, Jefferson, Leon, Liberty, Okaloosa, Santa Rosa, Wakulla, Walton, and Washington (Florida DOH). Everywhere else in the state, including Polk County and the rest of Central Florida, permitting and inspection still run through the county health department’s environmental health division.

In Polk County specifically, the Florida Department of Health in Polk County (DOH-Polk) inspects, evaluates, and permits the installation of all new and repaired septic systems in the county. Permits are handled out of the Bartow Environmental Public Health Office, and only registered septic tank contractors or licensed plumbers, or a homeowner working on their own personally occupied residence, are permitted to do the work (Florida Department of Health in Polk County).

When a permit is required

A permit is required before any of the following: new system construction, repair, alteration, modification, abandonment, or, for certain system types, ongoing operation. Under 64E-6.003, no portion of an onsite sewage system may be installed, repaired, altered, modified, abandoned, or replaced until a construction permit has been issued (Florida Administrative Code 64E-6.003).

A few things are specifically carved out and do not require a repair permit: routine servicing or replacement of like-kind mechanical or electrical parts, pumping septage from the tank, and minor structural corrections to a tank or distribution box. Everything beyond that, from replacing a drainfield to relocating a tank, needs a permit first.

• New construction: requires a construction permit before any installation begins, following a site and soil evaluation.
• Repairs: require a repair permit; the rule notes no fee is charged for a repair permit issued within 12 months of the system’s final authorization.
• Additions or modifications: required whenever a building change (an addition, a new bathroom, increased occupancy) would increase the design flow on the system.
• Abandonment: required when a system is being taken out of service, such as when a property connects to municipal sewer.
• Operating permits: required specifically for aerobic treatment units (ATUs), performance-based treatment systems, commercial systems, and systems in industrially or commercially zoned areas.

How the process works, and how long a permit lasts

For new construction, the process starts with a site and soil evaluation, which determines the water table depth, soil type, and percolation characteristics that dictate what kind of system the lot can support. That evaluation feeds a design, which is then submitted with the permit application. Once approved, a construction permit is valid for 18 months, and if building construction has already commenced, it can extend 90 days beyond that expiration (FAC 64E-6.003).

Before a system can be covered with soil and placed into service, the installer must notify the county health department and have the system inspected for compliance. If it passes, the department issues a construction approval. If it doesn’t, corrections are required and a reinspection fee applies. Repair work follows a similar inspection requirement before the repaired system can be covered, and in some cases a master septic tank contractor can self-certify a repair inspection under specific conditions defined in the rule.

Operating permits work differently: they apply to ATUs, performance-based treatment systems, and commercial or industrially-zoned systems, and are issued on an annual or biennial basis rather than a one-time construction approval. These systems also get inspected by the department at least once a year for the life of the permit.

What this means for buyers, sellers, and homeowners

Florida does not have a statewide requirement for a septic inspection at the point of sale, unlike some other states. That means an unpermitted addition, repair, or modification can go unnoticed for years, only to surface during a home sale, a refinance, or when a problem finally forces an inspection. If a system was modified without a permit, for example a repair that changed the drainfield footprint, it can create real complications when it comes time to get a new permit approved or to satisfy a lender.

Because permitting authority, fee schedules, and required documentation vary by county even within Florida, and because the difference between a routine repair and a permit-triggering modification isn’t always obvious, it’s easy to get this wrong, either by assuming something needs a permit when it doesn’t, or by skipping a permit that was actually required.

How PSC can help

Premier Septic Consultants doesn’t pull permits or perform the work, since PSC is a consulting service, not an installer or contractor. What PSC does well is research: confirming what permits exist (or don’t) for a property, what the county’s specific requirements are for a proposed repair or addition, and whether a system’s permit history lines up with what’s actually installed on the ground.

This is especially useful before buying a home with a septic system, or before signing off on work that a contractor says requires a permit. PSC’s septic records research service digs into the permit history for a specific property, and the homebuyer septic review folds permit verification into a broader independent check before you close.

You can also browse the Florida Septic Toolkit for more permitting resources, or call 863-812-1366 with a specific question.