Septic or sewer in Southwest Florida: what the parcel decides before you build

A Southwest Florida lot settles two wastewater questions before anyone designs a house on it: whether a public sewer line reaches the property line, and if not, which office permits the septic system and what kind of system the rules require.

Who issues the septic permit

As of October 2026, the Florida Department of Environmental Protection lists Charlotte, Collier and Lee among the counties where septic permits "are issued by the Environmental Public Health Program of the Florida Department of Health's local county health department."

In practice that means the Department of Health in Lee County (offices in Fort Myers and Lehigh Acres), in Collier County, and in Charlotte County, where the program covers systems producing 10,000 gallons or less of domestic strength sewage flow.

The May 2026 change

Chapter 2026-62, Laws of Florida (CS/CS/CS/HB 589), took effect on May 6, 2026 and rewrote section 381.0065(4)(a). For a single-family residence that needs a septic system, a city or county "may not require the owner or builder to receive a construction permit from the department for such system as a condition of issuing the building or plumbing permit." The owner or builder instead provides proof that a septic application was submitted.

Under section 381.0065(4)(b), if septic construction starts before the septic permit issues, the property owner or applicant "must assume all legal, financial, and safety liabilities arising therefrom." The building may not be occupied until the department approves the final septic installation. The building permit can move first. The certificate of occupancy still waits on the septic.

Some local guidance still shows the old sequence. Lee County's Residential Building Guide, last updated December 23, 2025, predates the law and still requires an approved septic permit before building permit issuance. A Charlotte County consumer guide still asks for the approved septic tank permit with the application. Charlotte's Residential Single Family page has a notice that gives July 1, 2026 as the effective date of this change and asks for a receipt from the Florida Department of Health showing that the septic application has been submitted. Under chapter 2026-62, the section that changed the permit order took effect on approval, May 6, 2026. July 1, 2026 is the effective date of section 2 of the act, which delays new septic rules for applications filed within 90 days of a rule's adoption.

When sewer counts as available

Section 381.0065(2)(a)1. defines when a sewer system is "available." It must be capable of being connected to the plumbing of the residence, not under a DEP moratorium, and have adequate permitted capacity. For a single-family residence with an estimated flow of 1,000 gallons per day or less, a gravity sewer line, or a low pressure or vacuum line where those are approved, must exist "in a public easement or right-of-way that abuts the property line."

That definition decides whether a new septic system is an option at all. Rule 62-6.005(7) says onsite systems "must be installed where a sewerage system is not available," and section 381.0065(1)(b) states the Legislature's intent that the department permit them where sewer is not available. Inside a nitrogen basin plan area, section 403.067(7)(a)10. separately prohibits new septic where sewer is available. Local utilities add their own connection duties.

• Cape Coral, Utility Extension Project: undeveloped parcels are required to connect to water and sewer prior to Certificate of Occupancy. Developed properties must connect within 180 days of the date on the Notice of Availability Letter. The city states that UEP assessments typically continue against the property regardless of owner, with some exceptions.
• Charlotte County Utilities: a mandatory connection means a wastewater collection line exists in an easement or right-of-way that abuts the property line, with availability defined in Charlotte County Code Sec. 3-8-41. The owner has 180 days from receipt to pay connection fees and connect, and unpaid amounts lead to a lien. Charlotte MSBU sewer assessments stay with the property once it is sold.
• State rule, section 381.00655(1): an existing working septic system must connect within 365 days after written notice that sewer is available, and a system needing repair connects within 90 days after written notice from the department.

Which utility, if any

Lee County Utilities states that it "is not the sole service provider within Lee County" and that while an area may fall within a provider's jurisdiction, "this does not guarantee that the necessary infrastructure is in place to deliver services." Bonita Springs Utilities serves the City of Bonita Springs, the Village of Estero and unincorporated south Lee County. Under the statute, availability is measured at the parcel's property line, not by service area.

Nitrogen rules where there is no sewer

Section 403.067(7)(a)10. prohibits new septic systems within a basin management action plan (BMAP) area where sewer is available as defined above. On lots of 1 acre or less within a BMAP where sewer is not available, the system must be an enhanced nutrient-reducing system or another system that achieves at least 65 percent nitrogen reduction. DEP dates the nitrogen-reducing requirement for lots of one acre or less to July 1, 2023, under HB 1379.

• Caloosahatchee River and Estuary BMAP: DEP describes the watershed as located in Charlotte, Collier, Glades, Hendry and Lee counties. The 2025 plan took effect November 25, 2025.
• Everglades West Coast BMAP: covers Hendry Creek in southwestern Lee County and the Imperial River near the City of Bonita Springs. The 2025 plan took effect November 25, 2025.
• As of October 2026, DEP's list of adopted BMAPs includes no Charlotte Harbor, Peace River or Myakka plan.

A watershed that touches a county does not put every lot in that county inside the BMAP. Check the plan boundary against the parcel.

How a system is sized

Rule 62-6.008, Table I, estimates residential flow by bedrooms and building area: 1 bedroom with 750 square feet or less, 100 gallons per day; 2 bedrooms with 751 to 1,200, 200; 3 bedrooms with 1,201 to 2,250, 300; 4 bedrooms with 2,251 to 3,300, 400. Each additional bedroom, or each additional 750 square feet of building area or fraction of it, adds 60 gallons. Where bedrooms and building area point to different rows, the greater flow applies. Building area, under Rule 62-6.002(13), is the enclosed habitable area, excluding the garage, carport, exterior storage shed and open or screened patios or decks.

Whether the site can hold it

• Water table: at the wettest season, at least 24 inches below the bottom of the drainfield (Rule 62-6.006).
• Soil: effective soil depth of 42 inches or more below the drainfield bottom.
• Fill: must raise the area above the 2-year flood and settle at least 6 months or be compacted to a density comparable to the surrounding natural soil (Rules 62-6.006 and 62-6.005(5)).
• Wells: 75 feet from a private potable well, 100 or 200 feet from a public drinking water well depending on flow, 50 feet from a non-potable well.
• Structures: not under buildings, and not within 5 feet of foundations (including pilings), pool walls or, with limited easement exceptions, property lines.
• Surface water: not within 75 feet of surface water bodies.
• Unobstructed area: at least 1.5 times the required drainfield absorption area.

With a water system regulated under section 381.0062, such as a private well, section 381.0065(4)(c) requires lots of at least one-half acre (21,780 square feet under Rule 62-6.005(7)(a)) with a minimum dimension of 100 feet or a qualifying mean width, and average flow of no more than 1,500 gallons per acre per day. With public water, section 381.0065(4)(d) allows no more than four lots per acre and 2,500 gallons per acre per day. Flow is computed on net usable area, excluding paved areas, road beds and surface water bodies.

Under section 381.0065(4)(i)2., lots platted before 1972 are subject to a 50-foot minimum surface water setback and are not subject to lot size requirements. Under Rule 62-6.005(7), lots platted between January 1, 1972 and January 1, 1983 that miss the lot area or density rules must install an enhanced nutrient-reducing system or an advanced secondary performance-based system.

An engineer designs it

In unincorporated Lee County, the Department of Health requires every new septic application to be designed by a Florida licensed professional engineer. In Charlotte, the county Code of Ordinances requires engineer-designed plans for all new construction permits, signed and sealed by a Florida-registered engineer.

Permit clocks and old approvals

• A septic construction permit is valid for 18 months after issuance and may be extended once for 90 days (section 381.0065(4)).
• If building construction has started, the septic permit stays valid an additional 90 days past the 18-month date (Rule 62-6.003(1)(d)).
• A septic permit application is valid for one year; an incomplete application past that deadline is denied (Rule 62-6.004(3)(c)).
• An expired permit can be revived only if it received construction approval within the previous five years, with a written statement of no changes, including on adjacent lots, a site re-evaluation and new permit fees (Rule 62-6.003(6)).
• Where the siting and installation information stays the same, a permit can transfer to a new owner who files an amended application within 60 days after the transfer of ownership (section 381.0065(4)). The transferred permit keeps its original issuance date (Rule 62-6.003(1)(e)), so on a lot sold with a septic permit, check that date.

During lot review, PrimeBid Construction LLC checks two things first: whether sewer abuts the parcel, and which office permits septic for it.