Septic vs. Sewer in Florida: Costs, Conversions and Who Must Connect

Under s. 381.00655, F.S., a home on a working septic system generally must connect to public or investor-owned sewer within 365 days after the sewer owner sends written notice that sewer is available, unless a waiver or variance applies. If the system needs repair, the deadline is 90 days after written notice from the state. Until sewer reaches your property line, septic remains a legal and common choice: Florida DEP estimates about 2.6 million septic systems in the state, used by about 30% of residents.

This guide explains exactly what the connection law says, which local septic-to-sewer programs we found in the areas we cover, and how the costs and trade-offs compare. It is general information, not legal advice. Your sewer utility and county septic office can tell you what applies to your address.

What Florida law says about connecting to sewer

The rule is in section 381.00655 of the Florida Statutes, titled "Connection of existing onsite sewage treatment and disposal systems to central sewerage system; requirements." It sets two timelines.

A properly working septic system: 365 days

The owner of a properly functioning septic system (an approved graywater system is excluded) must connect the system or the building's plumbing to an available publicly owned or investor-owned sewerage system "within 365 days after written notification" by the owner of that sewer system.

The same paragraph builds in notice and payment terms:

Advance notice. The sewer system must notify owners "no less than 1 year prior to the date the sewerage system will become available," and that notice must say connection will be required within 1 year of actual availability.
Paying ahead. Owners may prepay the amortized connection charges "in equal monthly installments over a period not to exceed 2 years" from the first notice.

A septic system that needs repair: 90 days

If the system needs repair or modification to work in a sanitary way or to meet the septic laws and rules, the owner must connect "within 90 days after written notification from the department." In hardship cases, on the owner's request, the department "may approve an extension of not more than 90 days," and it may approve only one extension. The paragraph does not allow an owner to create or keep a sanitary nuisance.

Waivers, variances and hardship

Public health waiver. With the department's approval, a sewer system may waive mandatory connection if connecting is not required in the public interest for public health reasons.
Performance-based systems. A local government or water and sewer district may grant a variance to the owner of a department-permitted performance-based treatment system that works properly and meets its operating permit. It does not have to.
Investor-owned sewer and hardship. For investor-owned systems, the local governing body may allow interest-free monthly installments over up to 5 years if the owner shows financial hardship.

The statute does not itself list a penalty for failing to connect. It does say that nothing in the paragraph "limits the power of a municipality or county to enforce other laws" for public health and safety. Ask your utility what follows if the deadline passes.

When does sewer count as "available"?

The connection clock depends on sewer being "available," which s. 381.0065(2)(a), F.S. defines. For a single-family home, a residential subdivision lot or another establishment with an estimated sewage flow of 1,000 gallons a day or less, sewer is available when a gravity sewer line that keeps gravity flow from the property's drain (or, in areas approved for them, a low-pressure or vacuum line) exists in a public easement or right-of-way that abuts the property line. The sewer system must also be able to connect to the plumbing, not be under a DEP moratorium, and have enough permitted capacity. Larger buildings and new subdivisions have wider distance tests.

Whether the line counts as "available" for your lot is a question for your utility and permit office. The City of Orlando also warns that where sewer already reaches the property line, a permit to replace a failed septic tank is less likely to be approved. If you are not sure, ask your utility whether sewer is available at your address before planning a major septic repair.

Septic-to-sewer programs in our area

Some cities and counties connect septic homes to sewer for free or at reduced cost, but only in set neighborhoods. These are the programs we could confirm on official pages. Details change, so check with the program before you rely on one. Our repair assistance and financing page has more on each.

Hillsborough County (near Tampa). The county's University Area program ran from January 18, 2023 to August 12, 2026 and was free for residential properties between Fowler Avenue and Bearss Avenue, from I-275 to Bruce B. Downs Boulevard. Owners who connected became City of Tampa customers with a monthly bill. That program has ended. The county has also set aside project funding for Gibsonton and Palm River and proposed conversion areas in Ruskin and Wimauma, and the project pages we opened do not say what owners will pay.
Pinellas County (St. Petersburg and Clearwater). With Tampa Bay Estuary Program funding, Pinellas County Utilities plans to connect specific property owners to sewer at no cost for the connection, and is contacting those owners directly. The project was still in the study phase when we checked. The county estimates residential sewer service at about $45 to $55 a month afterward.
City of Orlando, Rosemont North. The city is moving 104 properties from septic to sewer with a DEP grant under the EPA's 319(h) Nonpoint Source Management Program. Residents who connect while the grant applies have most of their out-of-pocket costs covered. The city says connecting later, without grant money, can cost $12,000 or more.
Toho Water Authority, Hopkins Park (Osceola County, near St. Cloud). The conversion is funded by HUD and free to eligible Hopkins Park homeowners who signed Toho's authorization agreement. Owners who did not use the outside funding are charged for the work. Toho expects to start connecting homes in March 2027.
Zephyrhills. A November 2023 funding request for the city's 6th Avenue project covers about 67 properties just east of city limits, inside the city's utility service area, and the city offered to waive $2,090 in connection impact fees for residents.
Oviedo. The city asked the state in 2021 for money for a Septic to Sewer Master Study. Its wastewater page lists the study as funded by a grant and in design and permitting.
Lake County (a treatment unit, not a sewer line). Lake County's program removes existing septic tanks and installs a small underground treatment unit that the county says provides sewer service without a pipe to a central plant. The county covers the initial cost as funds are available, and owners then pay a monthly service fee. Only properties in unincorporated Lake County inside a basin management action plan area qualify; properties inside city limits, such as Clermont, do not.

What each option costs

Septic and sewer bills arrive in different shapes. With septic, you pay for upkeep every few years and for repairs when they come. With sewer, you pay a one-time connection cost (unless a program covers it) and then a monthly bill.

Cost	Septic	Sewer
Routine upkeep	Pumping about $290–$600; EPA puts maintenance at $250–$500 every 3 to 5 years	Monthly utility bill (Pinellas estimates about $45 to $55 a month)
Major repair	EPA: $5,000–$15,000 to repair or replace a failed conventional system; drain field replacement about $3,000–$15,000	No tank or drain field to repair
Switching	Not applicable	Free in some program areas; Orlando says $12,000 or more without grant money

These are published planning ranges and single examples, not quotes. Connection costs vary by utility and by how far the house is from the line. Ask your utility for its impact or connection fees, and get a plumber's quote for the work on your lot. For septic prices, see the Florida septic cost guide or the septic cost calculator.

Pros and cons of each

Septic

No monthly sewer bill. Costs come as pumping and repairs instead.
The owner is responsible. Pumping, inspections and repairs are up to you. EPA recommends an inspection at least every 3 years.
Repairs usually need a permit, and in some springs areas a repair can require a nitrogen-reducing upgrade, which costs more.
Nutrients. In some springsheds, state plans count septic systems as a major nitrogen source. FDEP's Silver Springs and Rainbow Springs plan finds septic systems supply 32% of the nitrogen reaching groundwater in that area.

Sewer

No tank to pump or drain field to replace. Treatment happens at the utility's plant.
A monthly bill, and possibly connection and impact fees.
Less control. Once sewer is available and notice is given, connection is generally required on the law's timeline.
Sewer systems have their own storm problems. An FDEP report found that by the end of Hurricane Hermine, St. Petersburg was responsible for 51% of Florida's sanitary sewer overflows for 2016.

Neither option is right for every home. At a June 2019 Winter Park work session, the city's water and wastewater utility director said many residents did not want to give up septic tanks because of the cost of connecting. For others, a free program connection costs less than a major septic repair.

What to do if sewer is coming to your street

Read the notice. Note who sent it, the date sewer will be available and the deadline.
Ask about money. Ask the utility about connection fees, prepayment plans and any grant or program that covers the cost.
Hold off on big septic spending if you can. If the system works, routine pumping may be all it needs until you connect. Ask before paying for a new drain field. Don't delay repairs to a failing system that is backing up or surfacing; ask your permit office.
Plan the old tank. Florida law requires a permit to abandon a septic system. Ask whether the connection contractor handles it. Our county permit offices page lists who to contact.
Keep the paperwork. Connection records and the abandonment permit help when you sell.

The county septic resource finder lists the sewer and upgrade programs we found in each county we cover.

Frequently asked questions

Do I have to connect to sewer if my septic system works fine?

Generally yes, once sewer is available and the sewer owner sends written notice. The law gives a properly functioning system 365 days after that notice. Waivers and variances exist in limited cases, so ask the utility.

How long do I have if my septic system is failing?

If sewer is available and the system needs repair, the law requires connection within 90 days after written notice from the department. In hardship cases, one extension of up to 90 days may be approved at the owner's request.

Can I get a permit to replace my septic system if sewer is available?

It may be harder. The City of Orlando says a permit to replace a failed tank is less likely to be approved where sewer already reaches the property line. Ask your county septic permit office.

Will someone pay for my sewer connection?

Only in some areas. Programs in Pinellas, Orlando and Toho's Hopkins Park area cover some or all of the cost for set neighborhoods. Hillsborough's free University Area program ended on August 12, 2026. Check whether your street is included.

Is septic or sewer better for resale?

We have no data on that. Florida law bars any government from requiring a septic inspection when a home is sold (s. 381.0065(4)(x)). A buyer, a lender or the sales contract can still call for one. Our septic and real estate page covers what to ask.

Sources

Statutes and program pages were opened and checked in November 2026. Cost figures are planning estimates from the published sources below.