The stretch of Serene Hills Drive between Highway 71 and Lakeway Boulevard reads, on a July morning, like the private spine of a neighborhood. Oak canopy over the shoulder. A jogger heading down toward the trailhead in La Campana. A landscape crew turning into Los Senderos. If you live here, the road feels like an interior street that happens to connect two arterials.
On March 16, 2026, the Lakeway City Council voted, unanimously, on language that treats it as something else.
That vote, and two other things happening within a five-mile radius this summer, are usually reported as separate stories. They are not. Read together, they say that the quiet version of Serene Hills Drive residents have known since buildout is on a clock, and the clock is not tied to Highland Lakes High School the way people around the neighborhood have been assuming.
The item the Zoning and Planning Commission tried to remove
Lakeway's updated 2025 Comprehensive Plan reached council after almost two years of drafting and more than 2,000 resident comments. Buried in its transportation section was a proposed project to widen Serene Hills Drive from Highway 71 to Lakeway Boulevard.
At the Zoning and Planning Commission's March 4 meeting, ZAPCO recommended pulling the widening from the plan. Member Logan Brown's stated reasoning, per Community Impact's March 18 report, was that traffic pressure on Serene Hills Drive would ease once Lake Travis ISD's second high school opens, and that carrying the widening in the plan "just creates a cloud over residents in that area."
Council disagreed. Every member voted to keep the widening in the plan. The recorded rationale is worth reading in the language two council members used:
"Whereas I understand the neighbors and the neighborhood's concerns, Serene Hills does provide a service to the entire community, which we as a body of council must consider," council member Kent O'Brien said, with Matt Sherman echoing the point and adding that any actual improvement should be preceded by a proper engineering study.
Two things about this. First, a comprehensive plan is not zoning. City Manager Joseph Molis has said a resident dashboard is coming to track plan goals, and the city can pursue, defer, or ignore the widening on its own timeline. Second, the plan's own language now recognizes Serene Hills Drive as a road that "provides a service to the entire community." That is a different framing than "neighborhood street." It is the framing that justifies future engineering studies, future right-of-way conversations, and future through-traffic assumptions.
Why the "wait for the high school" argument stopped working
The counter-argument ZAPCO made rested on Highland Lakes High School absorbing enough traffic off Highway 71 and Serene Hills Drive to make widening unnecessary. That argument has weakened twice in the past nine months.
On February 18, 2026, the LTISD board voted to name the district's second high school Highland Lakes High School, with dark green, light blue, and white as school colors. The naming was the ceremonial part. The construction update presented the same night was the operational part: the campus is now slated to open for the 2029-30 school year, a year later than the 2028-29 opening projected as recently as September 2025. Chief Financial Officer Pam Sanchez told the board that construction is expected to begin in May 2026 and take roughly two years and nine months, giving the district ownership of the building by March 2029.
Reimers-Peacock Road, the access road leading up to the campus, is the piece with a nearer-term date. In March 2025, the district awarded an $11.88 million contract to Liberty Civil Construction for improvements to that corridor. Sanchez has said the road work is expected to be complete by September 2026. The road, in other words, arrives on schedule this fall. The school it serves arrives three years later.
For a Serene Hills homeowner, that gap matters. The traffic relief ZAPCO pointed to as a reason not to touch Serene Hills Drive is now a 2029-30 event, not a 2028 one. Three additional school years of Highway 71 volume will be routed the way it is routed today, and Serene Hills Drive will keep functioning as the shortcut between 71 and the 620 corridor that navigation apps have always treated it as.
Buildout finished quietly, and the market noticed
The third piece of the story is that the neighborhood itself is done. Serene Hills is 456 acres, 339 single-family homes, and, as of 2025, complete. The four sections that make it up have finished settling into their identities: Las Colinas Estates with its 2 to 2.5 acre lots, Los Senderos, La Campana, and Del Lago.
New construction inside the fence line is now measured in ones. C&A Builders' recent completion in Los Senderos, designed by Tim McIntyre, AIA, sits on the hillside to embrace greenbelt views while avoiding the harsh west sun. That kind of hyperlocal siting, board and batten with stucco and a single-level plan built into topography, is the vocabulary of a neighborhood that has run out of easy lots and is now doing careful infill.
The market signal that follows buildout is turnover. Recent MLS activity on Serene Hills Drive itself, including a four-bedroom, 2,937 square foot home listed in May 2026 at $1,145,000 that last traded in 2017, points to the arc that mature Hill Country neighborhoods take: original buyers reaching the sell decision, second owners entering, custom builds by named local architects competing on siting rather than lot availability. This is a neighborhood that will change hands, not add doors.
The through-route problem, stated plainly
Put the three items on the same table. Council has formally acknowledged Serene Hills Drive as regional infrastructure. The event that was supposed to reduce that role has slipped to 2029-30. The neighborhood is at buildout, so new residential trip generation from within Serene Hills is essentially fixed while the greater Hwy 71 corridor is not.
That is a coherent picture, and it is not the picture a resident gets from any single news story. It is the picture that tells you the calculus around Serene Hills Drive is about outside traffic, not inside growth. Engineering studies are the ceiling on how invasive the eventual improvements can be. Timing is the ceiling on how long the current road profile lasts. Both ceilings just moved.
For anyone considering a custom build inside the fence line, or a purchase that they intend to hold through 2030, the practical takeaway is a design one. Lot orientation relative to Serene Hills Drive matters more now than it did a year ago. Setback depth, planting buffers, driveway placement, and window massing on the west and south sides of a lot that faces the through-route are the levers a builder can pull to insulate the house from a road that the city has explicitly declined to treat as a purely local street.
A short list for the rest of the summer
- Watch the city's plan dashboard. Molis has said it is coming. It is the earliest signal any of us will get about which comprehensive plan items are actively moving.
- Track Reimers-Peacock progress. The September 2026 completion date is close enough to matter for anyone driving Hwy 71 west this fall.
- Note the Highland Lakes construction start. Site clearance was authorized late 2025 with a May 2026 construction start. Watch for confirmation.
- Pay attention to Las Colinas turnover. The 2 to 2.5 acre lots are the ones that most reward the kind of siting a careful custom build can deliver.
- Read the July council packet. Any Serene Hills Drive engineering study would show up as a line item long before shovels do.
The version of this neighborhood residents have known through buildout is not the version that will exist in 2030. That is not alarming. It is the ordinary arc of a Hill Country community that finished building and is now negotiating its relationship with the rest of Lakeway. What has changed in the past ninety days is that the negotiation is now on paper.
If you are thinking about a custom build on a Las Colinas lot, or reworking a Los Senderos home to sit better against what Serene Hills Drive is becoming, Seven Custom Homes has spent nearly two decades designing Hill Country residences around exactly this kind of long-horizon context. Contact Our Sales Team to Start Your Custom Home Consultation.
