If you're looking at a home along Highway N west of I-64 this fall, you're buying before anyone can see where the wider road will sit. MoDOT's Route N project page puts right-of-way plans in spring 2027 and right-of-way acquisition from spring 2027 through summer 2028. The page lists no construction date yet. The funding news from July is real. On this corridor, though, the road is scheduled to arrive after the houses, after the subdivisions next door and after the sewer plant built to serve them.
That order shapes what you'll live with for the next few years, and what the corridor will probably look like once the work is done.
What the July Announcement Paid For
In July 2026, county, city and state leaders announced more than $100 million to widen about four miles of Highway N, from Hawk Ridge Trail to just past Perry Cate Boulevard. First Alert 4 reported that the plan takes the road from two lanes to four and adds a median, a shared-use path and roundabouts.
The First Alert 4 funding story broke the package down by source:
- $40 million from the St. Charles County half-cent Transportation Sales Tax
- $23.7 million from MoDOT's state cost-share fund
- $22.8 million from MoDOT's district fund
- $15 million in federal funds through the East-West Gateway Council of Governments
- $750,000 in federal transportation funds requested by Congressman Bob Onder
East-West Gateway's July 2026 Route N Great Places report puts the Phase 1 estimate at $105 million. It describes the $15 million federal share as a May 2026 committee recommendation, with a final executive board vote set for August. A second phase would continue west toward Highway Z, and no funding for it was announced.
The Calendar Behind the Headline
Funding settles whether the project happens. Timing is set by a separate set of milestones, and those are spread over years.
| Milestone | Timing | Source |
|---|---|---|
| Preliminary design | Completed summer 2026 | MoDOT project page |
| Right-of-way plans | Spring 2027 | MoDOT project page |
| Public hearing | Spring 2027 | MoDOT project page |
| Right-of-way acquisition | Spring 2027 to summer 2028 | MoDOT project page |
| Hopewell Road to Hawk Ridge Trail lanes, 2.48 miles | Award date 2028, about $20.5 million in construction | MoDOT 2027–2031 STIP |
| Earliest construction start mentioned | "Late next year," depending on design and land acquisition | MoDOT via First Alert 4, July 2026 |
MoDOT's 2027–2031 Statewide Transportation Improvement Program lists that Hopewell-to-Hawk Ridge segment as project 6S3342C and labels it a potential design-build project. Its estimated total is $23.963 million. The First Alert 4 story ran in July 2026, so "late next year" means late 2027 at the earliest. Until then, Highway N stays the two-lane road it is today.
Even the Funded Intersection Took Longer
The Hopewell Road and Duello Road intersection gives a good sense of how these dates tend to move. At a March 2025 open house, MoDOT and the county showed the wider corridor as "unfunded future improvements" and the Hopewell/Duello signal as funded. A MoDOT handout said the signal would be paid for 80 percent by federal CMAQ funds and 20 percent by the county transportation sales tax, with construction "starting in Spring of 2026." The signal is designed to fit a future widened Highway N and includes a shared-use path across the road.
St. Charles County put that work out for bid in summer 2026 under IFB 26-080, and bids opened September 8. Spencer Contracting's bid of $943,108.91 was the lowest on the county's bid tab. The bid documents expected a notice to proceed around early November 2026.
That's roughly a two-season slip on a project under $1 million that already had its money. Nothing has been said about delays on the larger widening. The intersection is just the clearest example of how long the steps after funding can take.
The Sewer Plant Got There First
Sewer service shapes development on this corridor more than the road does. According to the Missouri Department of Natural Resources permit, Duckett Creek Sanitary District Treatment Plant 4 sits at 100 Duckett Creek Lane in Wentzville and discharges to Dardenne Creek. Its Phase 1 design flow is 2.5 million gallons per day, with a design population equivalent of 25,000. The permit took effect July 1, 2025.
County Executive Steve Ehlmann's letter at the front of the East-West Gateway report explains how that plant affects growth. Duckett Creek built it to serve development on the south side of Route N, and Wentzville continues to serve the north side. He writes that the plant "will allow denser residential development than in the past." A bond issue paid for it, and present and future users will pay that bond off. In Ehlmann's words, the district needs enough homes built for the bonds to be retired, and "if fewer houses are built, the cost to existing houses will increase."
A January 2023 district rate-study presentation modeled about $46 million in borrowing for what it called the Hopewell plant. Those were planning scenarios, not adopted rates. The bigger point is that the financing assumes more homes will connect. Ehlmann's letter names Post Farms north of Route N, and Harvest and the recently approved Caballo Farms to the south, as growth already moving west toward Perry Cate Boulevard.
So sewer capacity is in place and new subdivisions are going in, while the road waits for land acquisition.
Why the Order Runs This Way
The officials quoted by First Alert 4 explained the order directly. At the July press conference, Ehlmann said, "We want people to tell us where they want to live and we want to provide the services to those areas." St. Charles Mayor Dan Borgmeyer described the planning process as beginning "when a developer comes in and says what he's going to build."
A resident who has lived on Highway N for 28 years told First Alert 4 that rush hour makes it hard to get out of the driveway. Her question was timing: "So why not put the roads in first--then they don't have to redo everything." In the funding story, a Stone Meadows resident pointed to the Highway N and Hopewell intersection and to traffic during the school season. Another driver near the western end of the project described late-afternoon backups.
MoDOT's Tom Evers told the station that the state's gas tax increase has now reached its peak, which lets the agency start studies earlier.
What the Median Decides
The road's design will also shape what gets built beside it. The East-West Gateway report says people in the planning process worried that a wider Route N could follow Route K. After MoDOT widened Route K to five lanes, commercial development spread south across Route N to I-64. Ehlmann's letter says a median between two lanes in each direction "will dictate that such commercial development is only at the cross streets."
The report's land-use concept, which it calls illustrative, works through what that would mean:
- Office and limited commercial uses only at specific sites at the Welker Boulevard and Duello intersections, with parking facing away from Route N and a green look along the highway.
- A mixed-use Town Center District northeast of Perry Cate Boulevard and Route N, where a wider range of shops would go.
- Residential density rising toward Route N: single-family at about 3 to 6 units per acre, villas and townhomes at 6 to 12, and condominiums and housing for older adults at 12 to 24.
- Housing clusters such as Post Farms, Trailside, Oakshire, Autumn Hollow, Harvest and Caballo Farms linked by streets, greenways and trails.
The report also proposes a sidepath along Route N, a possible trail underpass, an extension of Perry Cate Boulevard and roundabouts at Welker Boulevard and a proposed western location. Exact roundabout locations haven't been set. One regional idea would connect that sidepath to Quail Ridge Park and, eventually, downtown Wentzville.
If you're comparing homes here, the drawings suggest where future shops, townhomes and trails could go. Actual zoning decisions will come from Lake Saint Louis, Wentzville, O'Fallon and the county, case by case.
A Few Questions We Hear
Does the funded work reach Highway Z? No. The funded Phase 1 runs from Hawk Ridge Trail to just past Perry Cate Boulevard. Continuing to Highway Z is a second phase.
When can the public see the design and comment? MoDOT lists a public hearing for spring 2027, the same season as the right-of-way plans. The project page names Andy Tuerck, MoDOT's Area Engineer for St. Charles County, as a contact at 314-453-5046.
Will sidewalks and paths be part of it? The design described in July includes a shared-use path. MoDOT's Route N fact sheet also lists sidewalk links, shoulders, roundabouts and a green-space buffer among the proposed features.
Everything here is general information about public plans. It isn't legal or financial advice, so if a property you own or are considering could be affected by right-of-way acquisition or sewer district costs, check with the right professional.
At The Cheri Norton Team, we've watched western St. Charles County grow for decades, and we follow corridors like Highway N because they affect what a home is worth over time. If you own along Route N, or you're weighing a house near Hopewell, Duello or Perry Cate, we'd be glad to walk through how these dates could affect your timing. Start with your free home valuation.
