Cost/Financial
New Septic System Installation Cost in Florida (Permits Included)
· 6 min read · How we research our guides
Published ranges put a new conventional septic system (tank and drain field) at about $3,500–$9,000. Aerobic and mound systems cost more: about $10,000–$40,000 or more for an aerobic treatment unit and $10,000–$50,000 or more for a mound system, across two national guides. Engineered systems on difficult sites can cost considerably more. On top of that come the permit fees: the state sets base fees (for example, $100 for application and plan review of a new system), and most county health departments add their own.
Where the lot is matters as much as what you install. Since July 1, 2023, new systems on lots of 1 acre or less in Florida's nutrient (BMAP) areas must be nitrogen-reducing where sewer is not available, and in some springs areas the rule is stricter. This guide covers the prices, the fees, the steps and the rules that change which system you can build.
Florida septic installation costs at a glance
| System | Published range |
|---|---|
| Conventional system (tank and drain field) | $3,500–$9,000 |
| Aerobic treatment unit (ATU) | $10,000–$40,000 or more |
| Mound (raised drain field) system | $10,000–$50,000 or more |
| EPA: repair or replace a malfunctioning conventional system | $5,000–$15,000 |
The conventional range draws on HomeGuide, Fixr, U.S. EPA. The aerobic and mound ranges span two guides, Fixr and HomeGuide. The low end is Fixr's table, which labels its figures materials-only. The high end is HomeGuide's installed costs, and HomeGuide leaves its top figure open ("or more"). These are national planning figures, not a Florida price survey, and we do not show city-level prices. Use them to judge whether a quote is in the normal span, then get written quotes from companies that serve your address.
What a new system includes
A typical installation quote should cover these parts of the job. Ask about any that are missing.
- Site and soil evaluation
- System design and permit application
- Tank and drain field installation
- Inspection before the system is covered
Permit fees for a new septic system
Florida law requires a permit before anyone builds a septic system (s. 381.0065(4), F.S.). The state sets base fees in Rule 62-6.030, F.A.C.:
| State base fee (Rule 62-6.030) | Amount |
|---|---|
| Application and plan review, new system | $100 |
| Permit for a new system, modification or repair | $55 |
| Surcharge on new and repair permits | $5 |
| ATU operating permit, every 2 years | $100 |
In most counties, the county health department issues septic permits on DEP's behalf and adds its own fees, so the real total is higher. Seminole County's health department fee schedule for fiscal year 2025-2026 lists $425 for a new system permit and $150 for an ATU operating permit every 2 years. Other counties set their own amounts.
Marion County (Ocala and Belleview) is different. Florida DEP has issued septic permits there directly since July 1, 2025, so the application goes to DEP rather than a county health department. Our county septic permit offices page lists who to contact in each county we cover.
Ask each installer whether permit and design fees are in the quote or billed separately. That one line can make two quotes look further apart than they are.
Step by step: how a new system gets built
- Site evaluation: soil and water table checks on the lot.
- Design and permit application to the county health department (Florida DEP in Marion County).
- Installation of the tank and drain field, or an alternative system where the lot needs one.
- Inspection before the system is covered, then final approval.
The soil and water table checks in step 1 decide most of what follows. The EPA lists household size, soil type, site slope, lot size and nearness to sensitive water bodies among the factors that shape a system's design. If the evaluation finds shallow soil or high groundwater, the designer may call for a raised (mound) system or an aerobic treatment unit, which costs more.
Nitrogen-reducing requirements
For many Florida lots, nitrogen rules decide the system type before price does.
- Statewide BMAP rule. Since July 1, 2023, new systems on lots of 1 acre or less in Florida's nutrient (BMAP) areas must be nitrogen-reducing where sewer is not available. State law defines an enhanced nutrient-reducing system as one that removes at least 50% of total nitrogen before the drain field, or at least 65% counting the tank and drain field together.
- Which systems qualify. DEP lists in-ground nitrogen-reducing biofilters, Florida-approved nitrogen-reducing aerobic treatment units certified under NSF 245, and Florida-approved nitrogen-reducing performance-based treatment systems. Not every ATU qualifies.
- Silver Springs and Rainbow Springs. DEP adopted this springs plan by final order on June 27, 2025, and declared it final and effective on April 27, 2026. It is stricter than the statewide rule: DEP's August 2026 table lists the nitrogen-reducing requirement for new systems on any size lot as of July 27, 2026, and for repairs on any size lot.
- Wekiwa and Rock Springs (Orange County). Since March 1, 2025, repair or modification permits for conventional systems on lots under 1 acre in the Priority Focus Area require an upgrade to a nitrogen-reducing system.
We have no separate published range we trust for nitrogen-reducing systems, so ask installers to price the specific approved system your lot needs. Our conventional vs. aerobic guide explains how the systems differ, and the Florida septic regulations page covers the rules. Some county programs help pay for upgrades in springs areas; see repair assistance and financing.
What drives the cost
- System type. A conventional system runs about $3,500–$9,000; aerobic systems about $10,000–$40,000 or more, and mound systems about $10,000–$50,000 or more.
- Soil and water table. EPA says mound systems are an option where soil is shallow, groundwater is high or bedrock is shallow, and that they need a lot of space and periodic maintenance.
- Location and nitrogen rules. A lot in a BMAP or springs area may need an approved nitrogen-reducing system.
- Household size. EPA lists household size among the factors in system design, so a larger home may need a larger system.
- Permits and design. State base fees plus county fees; ask whether they are in the quote.
- Running costs. An ATU adds a maintenance contract (about $175–$600 per year) and an operating permit every 2 years.
Questions to ask before you sign
- What type of system does my lot need, and why?
- Is my lot in a springs or nutrient protection area that requires a nitrogen-reducing system?
- What do the permit and design fees come to, and are they in the price?
- How long does permit approval usually take?
- What warranty covers the tank, the drain field and any pumps?
- Are you registered with Florida DEP as a septic tank contractor?
DEP registers septic tank contractors. Check any company with our registration checker or the verification worksheet. To line up two or three bids, use the septic quote comparison tool. For a quick estimate, try the septic cost calculator, which uses the same ranges as this page. Our Florida septic cost guide covers pumping, repair and inspection prices. When you are ready, browse companies in the directory.
Frequently asked questions
Does a new septic system need a permit in Florida?
Yes. Florida law requires a permit to build a septic system. The county health department issues it in most counties; in Marion County, Florida DEP does.
What is a nitrogen-reducing septic system?
A system that removes at least 50% of the nitrogen before the wastewater reaches the drain field, or at least 65% counting the tank and drain field together. Since July 1, 2023, new systems on lots of one acre or less in Florida's nutrient (BMAP) areas must be this type when sewer is not available.
How long does a septic tank last?
The EPA says a concrete septic tank may last 50 years or more, while pumps and controls often need replacing every 10 to 20 years.
How much are septic permit fees in Florida?
The state's base fees include $100 for application and plan review of a new system, $55 for the permit and a $5 surcharge (Rule 62-6.030, F.A.C.). County health departments add their own. Seminole County, for example, lists $425 for a new system permit. Ask your county office or installer for the full amount.
Is it cheaper to repair or replace?
It depends on what failed. A typical repair of a part such as a baffle, lid or pump runs about $600–$3,000, far below a new system, but a failed drain field may need replacing. Our repair and drain field cost guide lists repair prices, and a septic professional can tell you whether your system can be repaired.
Sources
Cost figures are planning estimates from the published sources below, not quotes. Rules sources were opened and checked in November 2026.
- U.S. EPA: How to Care for Your Septic System (updated August 2026)
- U.S. EPA: Why Maintain Your Septic System (updated March 2026)
- HomeGuide: How Much Does Septic Tank System Repair Cost? (updated December 2025)
- HomeGuide: How Much Does a Septic Tank System Cost? (updated September 2025)
- Fixr: Septic System Installation Cost (updated January 2025)
- Fixr: Septic Tank Repair Cost (updated January 2025)
- InspectApedia: Aerobic (ATU) Septic Maintenance & Repair Costs (updated May 2024)
- Florida Administrative Code: Rule 62-6.030, F.A.C. (Fees) (updated June 2026)
- Florida Department of Health in Seminole County: Environmental Public Health Fee Schedule 2025-2026 (updated FY 2025-2026)
- Florida Statutes s. 381.0065: Onsite sewage treatment and disposal systems
- Florida DEP: Onsite Sewage FAQ, Permitting
- Florida DEP: Permitting enhanced nutrient-reducing onsite sewage systems
- Florida DEP: Enhanced Nutrient-Reducing Requirements for OSTDS, by BMAP (August 2026)
- Florida DEP: Amended Order Closing File, Silver Springs and Rainbow Springs BMAP challenge (April 2026)
- Florida DEP: Septic Tank Contractor Registration
- Orange County: Septic Pollution Prevention (Wekiwa Springs)
- U.S. EPA: Types of Septic Systems
Find septic companies near you
Services covered in this guide: septic installation, septic inspection, aerobic system service, drain field repair.