Septic or Sewer in Orlando? What Orange County's Conversion Push Means for Buyers and Sellers

Roughly 2.6 million Florida homes and businesses run on a septic tank instead of a sewer line — and in Orange County, the government is actively working to shrink that number. If you're buying or selling a home in the Orlando area, the question "septic or sewer?" is no longer just a line on the listing sheet. It can mean a ten-year assessment on the tax bill, a $10,000 county incentive, or a conversion project scheduled to dig up the street the year after you close.

Here's what the county's septic-to-sewer push actually involves, what it costs, and the questions worth asking before you sign anything.

How common is septic around Orlando?

Statewide, the Florida Department of Environmental Protection estimates about 2.6 million onsite sewage treatment and disposal systems — the regulatory name for septic systems — are in operation, serving roughly 30% of Florida's population. Florida alone accounts for about 12% of all septic systems in the United States. (Those are statewide figures as published on FDEP's Onsite Sewage Program page as of October 2026; FDEP does not break them out for Orange County on that page.)

Closer to home, Orange County Utilities' Septic 2 Sewer program says septic systems are responsible for 29% of the nitrogen reaching Wekiwa Springs — the figure driving the county's conversion work in the Wekiwa Springs area of unincorporated Orange County.

One practical note on names: "Orlando" on a listing can mean the City of Orlando or the broader unincorporated county. The conversion programs described below are Orange County programs, and most of the active project areas sit in unincorporated Orange County, not inside city limits. Your specific parcel — not the city name on the mailing address — determines whether any of this applies to you.

The Wekiwa Springs conversion: who pays, and how much

The county's largest conversion effort aims to connect almost 2,000 homes in the Wekiwa Springs area to central sewer. As of the program page in October 2026, Phases 1 through 3 (211, 154 and 214 properties respectively) are complete, Phase 4 (396 properties) is under construction, Phase 5A received its notice to proceed in July 2026, Phase 6 (83 properties) is anticipated to start construction in late fall 2026, and Phases 5B, 7A and 7B are anticipated in 2027.

The cost structure matters for anyone buying or selling in a project phase:

Property owners contribute roughly 10% of total project costs through a Municipal Service Benefit Unit (MSBU) assessment, with the exact amount set per neighborhood. That assessment is spread over 10 years and collected on the property tax bill, with interest and administrative fees included. It covers the connection itself, abandonment of the old septic tank, landscaping restoration, road resurfacing and irrigation work.

Separately, properties in the program that have not yet connected pay a flat wastewater rate of $63.28 per month under the county's current structure.

For a buyer, that means a home in a conversion phase can carry an assessment balance on its tax bill for years after the pipes go in. Nothing about that is hidden — it's on the tax bill — but it belongs in your math and in the contract conversation about who pays what at closing. For a seller, it's a fact pattern worth getting ahead of rather than explaining for the first time when the buyer's lender spots it.

Pine Hills: a finished example

Conversions aren't hypothetical. In July 2026, Orange County announced the completion of the Pine Hills Septic 2 Sewer project, which since 2024 converted 95 parcels — 65 businesses and 30 homes — along Pine Hills Road between Alhambra Drive and Golf Club Parkway, replacing 22 manholes and installing thousands of feet of pipe. The work was funded by a mix of Florida Department of Environmental Protection grants, federal American Rescue Plan Act dollars and county funds. If you're looking at property near a corridor like this one, our Pine Hills community guide covers the area's housing stock, and the county's project pages will tell you whether a specific parcel was included.

The $10,000 incentive for keeping (and upgrading) a septic system

Conversion isn't the only track. For homeowners in the Wekiwa Priority Focus Area, Orange County's Septic Upgrade Incentive Program offers up to $10,000 per household to replace an older conventional septic system with an enhanced nutrient-reducing one. Per the county's March 2026 release, the program had drawn 887 inquiries, with 467 households qualifying and 87 projects approved. The county says enhanced systems reduce nitrogen by at least 65% before wastewater reaches groundwater.

"It can be difficult to picture, but wastewater from septic systems eventually moves through groundwater and into nearby water bodies," said Emily Lawson, an engineer with Orange County's Environmental Protection Division, in that release. "Reducing nutrients at the source helps protect those ecosystems."

The same release offers a cautionary data point on what a failing system costs: one Orange County resident reported having her failing tank pumped every six to eight weeks at roughly $375 per visit before upgrading. A healthy system doesn't cost anything close to that — but a dying one can quietly outspend a sewer bill.

Five questions to ask before you buy (or list)

Is the home actually on septic? Don't assume from the age of the house or what nearby streets have. Confirm with the utility and the listing documents.

What's the permit history? Septic systems are permitted under Chapter 381.0065, Florida Statutes; the program moved from the Department of Health to FDEP in July 2021, and permit records exist for repairs and replacements. A recent drainfield replacement is worth very different money than a 40-year-old original.

Is the parcel in a conversion phase or a priority focus area? The county's Septic 2 Sewer page lists phases, maps and contacts. If yes: what's the assessment, how much remains, and who pays it at closing?

If sewer reaches the street later, what happens? Florida law — section 381.00655, Florida Statutes, titled "Connection of Existing OSTDS to Central Sewerage System; Requirements" — governs when an existing septic system must connect to newly available sewer. We weren't able to verify the statute's exact deadlines from the Legislature's site for this article, so read the statute itself or ask the county rather than relying on a summary.

What does abandonment involve? Connecting to sewer isn't just hooking up a pipe — the old tank must be properly abandoned under state rules — permitted, pumped out by a licensed hauler, collapsed, filled and inspected — which in county conversion projects is covered by the assessment.

If you're weighing what a septic system, an assessment or a completed conversion does to a specific home's value, our home value tool is a starting point, and our Orlando guide and the rest of our 19 community guides cover the areas these programs touch.

Talk it through before you commit

Septic versus sewer is one of those issues that's invisible right up until it's expensive — or until it's a negotiating point you didn't know you had. If you're buying or selling a home on septic anywhere in the Orlando area, a conversation with Bethanne Baer, Broker/Owner of Bear Team Real Estate, is free, and it's a good deal cheaper than discovering an assessment after closing.

This article is for general education and reflects market data published as of October 5, 2026, drawn from the sources linked above. Market conditions change, and figures are revised. Nothing here is financial, legal, tax, or lending advice, and no statement here is a recommendation to buy or sell. Equal Housing Opportunity.