"While construction of various developments is currently underway in the Village, those projects have consumed the last of the available sewer capacity." That sentence is on the Village of Plain City's regional sewer update page. For anyone comparing Plain City with Hilliard, Dublin or Marysville, it matters more than any median price on a portal.
According to the same page, the Ohio EPA "has effectively prohibited the issuance of new sewer permits in Plain City until compliant facilities are available." Those facilities are a new regional wastewater plant near I-70 and US-42 by London, plus roughly 11 miles of new lines running back to the village. In May 2025, the Mid-Ohio Water and Sewer District said it expects them to be operational by early summer 2028.
So the new homes being framed and sold in Plain City this fall are the last batch the current system can serve. In the September 2026 data, that capped pipeline lines up with a market moving the opposite way from the rest of central Ohio.
Why the village can't just build a bigger plant
The obvious fix would be expanding the existing plant. The August 2025 environmental assessment prepared for the regional project explains why that's off the table. The Plain City plant on Central Avenue was recently improved to meet its effluent limits. It now has a treatment capacity of 1.25 million gallons per day and handles an average daily flow of 711,000 gallons.
The plant sends treated water into Sweeny Run and Big Darby Creek. The assessment says the effluent standards for those waters rule out any further expansion of the facility. Big Darby Creek is a designated State and National Scenic River, and the village describes those standards as "stringent." The assessment also projects that Plain City will see the highest growth in the planning area, and says the current plant "will not meet Plain City's predicted growth." Any new capacity has to be piped to the new regional plant.
The regional plant is planned in phases. The first treatment phase is designed for 5 million gallons per day, and two later phases of about 5 million each would bring it to 15 million. That first phase alone is four times the size of Plain City's current plant.
None of this is happening at the village level anymore. The village says it began pursuing a regional solution with Madison County in 2022. The district was established in 2023 and took over ownership, operation and planning of water and sewer infrastructure in Plain City, the City of London and other parts of Madison County. Its service in Plain City began in January 2024.
What's left on the shelf
The village lists Darby Station, Madison Meadows, Maren Reserve, The Hamlet on Darby and The Run at Hofbauer Preserve among its developments. In 2026, village council has been accepting public improvements in several of them, including Madison Meadows Sections 1, 2A/2B and 3A/3B, and The Run at Hofbauer Preserve Section 2. When a village accepts a section's streets and utilities, that section is finished on the ground.
The builders' own community pages show how far along these neighborhoods are. As of late October 2026:
| Community | Builder | Status on the builder's page |
|---|---|---|
| Madison Meadows II | D.R. Horton | New phase labeled "Now Selling" |
| Madison Meadows Patios | D.R. Horton | Labeled "Final Opportunities" |
| Darby Station | M/I Homes | "Now Selling," with the Signature Collection described as a final opportunity |
| The Run at Hofbauer Preserve | Rockford Homes | One homesite remaining |
These labels change week to week. Even so, three of the four communities describe themselves as winding down. The village says no new sewer permits can be issued to replace them until the regional system opens.
The September numbers run against the metro
Columbus REALTORS reports Plain City under the MLS area "Jonathan Alder Local School District (Plain City)," which covers parts of Madison and Union counties. That's a wider footprint than the village limits. Here's how that area's September 2026 report compares with the full central Ohio MLS, based on the Columbus REALTORS September 2026 housing reports:
| September 2026 | Plain City area | Central Ohio |
|---|---|---|
| Homes for sale | 65, down 4.4% year over year | 6,530, up 12.3% |
| Months' supply | 2.7, down 10.0% | 2.6, up from 2.3 |
| Median sale price | $481,360, up 8.5% | $334,250, up 2.8% |
| Closed sales | 24, up 9.1% | 2,550, down 5.7% |
| Days on market | 46, up from 36 | 33, up from 30 |
Across central Ohio, buyers have more choices than a year ago and are buying fewer homes. In the Plain City area, inventory shrank, sales rose and the median price climbed about three times as fast as the region's. Year to date through September 2026, the Plain City area recorded 202 closed sales against 192 over the same stretch of 2025, and the median rose 5.5% to $470,000.
The reports don't separate new construction from resale, so they can't prove the sewer cap caused this gap. The gap does fit what you'd expect when the newest homes on the market can't be replaced. Two cautions apply. A single month with 24 sales can swing a lot. And September's 46 days on market was slower than a year earlier, so buyers there are still taking their time. On a year-to-date basis, days on market were 60 in 2026, compared with 62 in 2025.
What happens when the line opens
The village's description of the reopening is the second half of this story. It says there is no formal waitlist for new sewer capacity. When the regional system is running, "access will become available simultaneously for all projects throughout the MOWSD service area, including Plain City and surrounding townships." Which projects go first will depend on how ready each one is and how close it sits to sewer mains.
Projects are already lining up. The village says it is working with several developments in the planning stages and welcomes proposals that can be ready once capacity returns. Its 2025 legislation includes acceptance of a 184.667-acre annexation from Jerome Township, rezoning of more than 478 acres, and pre-annexation agreements with Clayton Properties Group and Pulte Homes. Those agreements' utility terms aren't spelled out in the legislation titles. Still, land is being lined up while the pipe gets built.
The Union County side of the village may have another option. The village says some projects there could connect through the City of Marysville, but expects that service on a similar timeline, around mid-2028.
The district's paperwork shows the project moving forward. The agenda for the October 20, 2026 MOWSD board meeting, held at the Plain City Municipal Building on Village Boulevard, listed a resolution to approve a construction-manager agreement with Peterson Construction Co. for the US42 Force Main project. The same agenda included a rate study update. Approving that contract was on the agenda for that meeting, and the agenda doesn't show the outcome. The early-summer 2028 target still traces back to the May 2025 announcement.
What this means for the new-or-resale decision
If you're choosing between Plain City and another suburb over the next year or two, the sewer timeline affects your options in three ways:
- New construction in Plain City is a closing-out product right now. When a builder says "final opportunities," there's no next phase waiting behind it under the current permit limits. If you want a specific floor plan or lot type, you're picking from what's left.
- Resale homes compete with new phases that are selling now and can't be restocked. Madison Meadows II and Darby Station still have homes for sale. Once those are gone, no new phase can replace them until capacity returns. In September 2026, Plain City-area inventory fell while the metro's rose, so Plain City is moving differently from the suburbs you may be comparing it with.
- The picture may change after the plant opens. Since there's no waitlist and the reopening is designed to happen all at once, several planned projects could become eligible together once the regional system is running. When and how much depends on construction, readiness and the district's schedule, and none of that is final today.
On the October 20 agenda, the district's rate study appears as an update item, and the 2028 target has not been reaffirmed in a 2026 update. If you're weighing a home on the Union County side, the Marysville option is also worth asking about directly. The village's sewer page lists contacts at the Mid-Ohio Water and Sewer District for questions about water and sewer availability, connections and capacity.
Quick answers
Does the sewer limit affect existing homes already connected? The village's statement is about new sewer permits. The Ohio EPA assessment says the existing Plain City plant will keep operating, and any added flow will be sent to the regional plant.
Is there a list I can get on for a future lot? The village says there is no formal waitlist for sewer capacity. Any lot or phase reservation would come from a builder, not the village.
Is 2028 a firm date? It's a target. MOWSD announced it in May 2025, and the village's update still points to early summer 2028.
If you own in Plain City and want to know where your home stands before the 2028 pipeline opens, Keli M Fisher can walk you through the current comparables, or you can start with a quick number. Get Your Instant Home Valuation.