Why Clayton's Next Wave of New Homes Depends on Water and Sewer Capacity
October 22, 2026
October 22, 2026
Johnston County updated its utility fee schedule on September 1, 2026, and one footnote matters more for new homes around Clayton than any of the rates above it. It says the county "currently has limited excess water capacity," and it limits how much more capacity bulk customers can buy this fiscal year if they already use more than 80% of what they have. The Town of Clayton is the only system named in the county's top tier of bulk buyers, the tier for systems using more than half of all county bulk sales.
Buyers comparing Clayton with other Triangle suburbs usually assume that open land means a steady stream of new construction. Land is not what limits that stream. Capacity in the pipes decides how many new homes get built. That capacity is constrained at the county level and allocated by score at the town level, while the plants meant to add more are still being finished.
The full county note reads as follows in Johnston County's current utility fee schedule:
"The County currently has limited excess water capacity. Therefore, for FY 26-27, the County will limit sales to bulk customers utilizing over 80% of their existing available capacity. Bulk customers will be allowed to purchase sufficient capacity to have no more than 20% excess capacity."
In practice, a town or utility already using most of what it bought can add only a thin cushion, not a large reserve held for future subdivisions. Customers with existing interlocal agreements can still buy capacity under the terms of those agreements. Clayton gets its water from Johnston County Public Utilities, so the county's own capacity sets an upper limit on everything downstream.
Capacity also got more expensive on the same date. The county's bulk capacity fee in its highest hydraulic zone went from $21.72 to $28.30 per gallon per day. The monthly base charge for Clayton's tier went from $2,500 to $2,755, and the bulk commodity charge went from $3.95 to $4.35 per 1,000 gallons. For county retail customers, a 3/4-inch tap fee went from $800 to $1,000, and the first residential usage tier went from $5.45 to $6.00 per 1,000 gallons.
Once capacity reaches Clayton, the Town hands it out through its own Wastewater Allocation Policy, most recently revised in June 2025. Three rules shape which projects move forward:
Requests are scored. A request that scores under 50 points does not qualify, and Town Council reviews any allocation of 10,000 gallons per day or more as part of subdivision, mixed-use and special-use reviews. The policy also says capacity tracking is inexact and that an allocation report does not guarantee capacity will be available.
These rules favor certain kinds of development. A conventional subdivision of only single-family homes competes for a capped share, while a project that adds commercial space can go past that cap. One example of what reaches Council is the May 18, 2026 agenda, which listed a resolution to grant wastewater-treatment capacity to Dominium-Clayton Mixed Use, also called Pritchard Woods.
New connections also carry the Town's system development charges. Clayton's FY27 fee schedule lists $3,904 for a 5/8-inch water meter and $7,096 for a 5/8-inch sewer meter. Those charges are part of the cost of creating each new home site in town.
The Town explains in its water reclamation facility FAQ why it is building its own plant. Clayton has wastewater-treatment agreements with Johnston County and Raleigh, but those communities "are grappling with their own treatment and capacity constraints, reflected in their rate increases." The Town's response is the Sam's Branch Water Reclamation Facility. It sits on Town-owned property near the Neuse River and is designed to treat up to six million gallons of wastewater a day. The Town calls it the largest capital investment in its history.
The schedule has slipped. A Town release from August 2024 described a roughly $280 million facility that would be finished in fall 2025. In the Town's February 2026 project update, the plant was in "wet runs," with water flowing through it to test that the systems work, and full operation was expected in 2026. The project page still gives 2026 as the completion year and says planning has started for a Phase 2 expansion, with timing that depends on how the plant performs and how fast Clayton grows.
Sam's Branch is one of several capacity projects around Clayton, and each runs on its own schedule:
At their October 5 meetings, commissioners set a $5 million budget for the first phase of that treatment plant, covering site planning, preliminary engineering and permit coordination, according to the JoCo Report. The wastewater side gets relief over the next few months, but the county's long-term answer on water supply is about five years away.
Many homes with a Clayton address are outside the Town's utility system. Aqua NC's Flowers Plantation system buys bulk water from the county and falls in the tier covering 11% to 25% of all county bulk sales. Its monthly base charge went from $1,000 to $1,100 on September 1.
For new subdivisions under county review, Johnston County is rewriting its Unified Development Ordinance. In the county's recap of the October 5 meetings, commissioners leaned toward tying subdivision approval to adequate water supply. The draft under discussion would also:
These are proposals, not adopted rules. The county posted Version 4 of the draft and scheduled three meetings before adoption, on October 20, October 26 and November 2, according to its UDO information page. The county says commissioners could adopt it November 16.
The two paths side by side:
| Where the project sits | Who approves new capacity or lots | Capacity condition on record |
|---|---|---|
| Town of Clayton utility service | Town's scored allocation process; Town Council reviews requests of 10,000 gallons per day or more | Residential-only projects capped at 50% of available capacity; Sam's Branch due in 2026 |
| Aqua NC, Flowers Plantation | County subdivision review | Aqua buys bulk water from a county that reports limited excess capacity |
| Other unincorporated Johnston County | County subdivision review | Proposed UDO would tie approval to adequate water supply |
The broader market is fairly calm. North Carolina's statewide September 2026 report from NC REALTORS shows a $370,000 median sale price, up 0.7% from a year earlier, with 5.93 months of inventory and closed sales down 11%. Those are statewide figures, and builders across the region are offering incentives. Eastwood Homes, for example, advertised a fixed rate as low as 4.99% on select completed homes, with a full-price purchase, its preferred lender and a closing by December 1, 2026 required. Its Johnston County communities, Berea Farms and Black Forest Pointe, are near Benson, not Clayton.
The supply of new homes around Clayton follows a different rule than those numbers suggest. A resale home that is already connected keeps its service. A home that is not built yet, in a phase not yet approved, depends on capacity being allocated before anyone can build it. The county reports limited excess water capacity, Clayton limits how much of its sewer capacity goes to residential-only projects, and the county is considering water supply as a condition of subdivision approval. Given all three, the number of new lots near Clayton will depend on when plants come online and how capacity gets scored.
For buyers weighing a future phase of a new community or land for a custom build, it helps to ask early which system will serve the address and whether the phase already has its capacity allocated. Those two answers determine when that home can be built. Clayton is also reaching a size where other systems change. The JoCo Report reported that Clayton now qualifies for federal urban transit funding and that county commissioners heard a proposal to send that money through Raleigh to the Johnston County Area Transit System for transit planning in the Clayton area. More background on the town is in our Clayton neighborhood guide and our post on Clayton for relocating buyers who want more space.
This is general information, not legal, tax or financial advice. Please confirm fees, allocations and approvals for a specific property with the utility, the town or county, and the right professionals.
The Town's project page lists 2026 as the completion year. Its February 2026 update described wet-run testing and said full operation was expected this year.
Not yet. Tying subdivision approval to adequate water supply is part of the proposed UDO, and the county says commissioners could adopt it November 16. The limit on bulk capacity sales to customers above 80% of their capacity is already in effect for FY 26-27 through the county fee schedule.
Yes. Johnston County's fee schedule that took effect September 1, 2026 raised retail tap fees, usage rates and bulk charges.
If you're looking at a new phase, a lot or a custom build around Clayton, SB Real Estate can help you find out which utility serves the property and where its approvals stand before you commit to a schedule. Schedule a Personal Consultation and we'll go through those questions for the properties you're considering.
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