Ask anyone who has shopped for a home in Westlake what they know about the town's finances, and they will tell you the same thing: taxes here are low. It is one of the first facts a buyer learns, and it is true. The Town of Westlake adopted a property tax rate of $0.167880 per $100 of value for the 2024 tax year, a rate the town has held roughly flat since 2020, and even the higher rate of $0.18500 the council put up for a public hearing in September 2025 barely moves the needle on a multi-million dollar home.
What that reputation leaves out is that the town's own rate is not the number that decides most of a Westlake buyer's tax bill. That job belongs to a line most people never think to ask about: which school district the specific lot sits in. Westlake is split across three of them, and the gap between the highest and lowest is large enough to rival the entire municipal tax bill on its own.
The line no listing photo shows you
Westlake is a single town with one town council and one town tax rate, but it is not a single school district. Depending on the address, a home inside Westlake town limits can be zoned to Carroll ISD, Keller ISD, or Northwest ISD. None of that shows up in a curb shot or a floor plan. It shows up on the tax roll, and the three districts do not charge the same rate.
Here is where each stood for the current 2025-26 tax cycle, using rates confirmed by the districts themselves and by the Tarrant Appraisal District's own published tax rate table:
| School District | 2025-26 Rate per $100 | Change from Prior Year |
|---|---|---|
| Carroll ISD | $0.9294 | Down from $0.9617, after voters approved a rate election in November 2025 |
| Northwest ISD | $1.0841 | Per Tarrant Appraisal District's 2025 published rates |
| Keller ISD | $1.0852 | Unchanged from the prior year, adopted by trustees in a 5-2 vote |
Carroll ISD's board president called the new rate the lowest in the district's history when it passed. Keller ISD's trustees kept their rate flat for another year after a contested vote, with one board member noting how hard it was to explain holding steady while neighboring districts cut theirs. Both statements are true, and both describe the same town.
What that gap actually costs
Run the math on a home near Westlake's own citywide median, which sat just under $3 million in listing price as of late May 2026. Apply the standard $100,000 school homestead exemption to get a taxable value of $2.9 million, then multiply by the roughly 15.6-cent gap between Carroll ISD's rate and Keller ISD's rate.
That gap alone comes to about $4,500 a year. Compare that to the town's own portion of the bill on the same home, which lands somewhere between $5,000 and $5,500 depending on which of Westlake's recent rates applies. The swing between school districts is nearly as large as the entire municipal tax bill that gets all the attention.
This is a simplified illustration built to show scale, not a substitute for a certified tax estimate from the appraisal district. Exemptions, assessed value, and the exact boundary line all shift the real number. But the direction holds for anyone comparing two homes at similar price points inside the same town.
Same town, two names worth knowing
The clearest version of this split shows up in two of Westlake's best known communities. Vaquero is the town's flagship guard-gated golf community, built around approximately 298 homes and a course designed by Tom Fazio, according to the town's own description of its subdivisions. Vaquero sits in Keller ISD, which means its owners carry the higher of the two rates in the table above.
A few miles away, Glenwyck Farms sits on more than 100 wooded acres with one-acre home sites, a running brook, and a 13.5-acre neighborhood park with three rustic footbridges. Glenwyck Farms families have the option of Westlake Academy or Carroll ISD's traditional schools, which places the neighborhood in Carroll ISD for tax purposes, the lower rate in the table.
Two homes at the same price point, both genuinely inside Westlake, can carry a tax bill that differs by thousands of dollars a year because of which side of an internal boundary they happen to sit on. Neither buyer did anything wrong. The gap was simply baked into the parcel before either of them made an offer.
Buyers touring resale inventory in these neighborhoods should also budget for the smaller, more immediate costs that come with an established HOA. Glenwyck Farms, for example, charges a $375 resale certificate fee at closing, the kind of line item that rarely shows up until the title company asks for it.
Westlake Academy doesn't change this math
One assumption worth correcting directly: choosing Westlake Academy, the town's own open-enrollment charter school, does not move a property out of its zoned ISD for tax purposes. Charter schools in Texas do not set their own property tax rate. They are funded through the state's per-student formula and town support, not through a local school district levy on any specific home.
That means a family in Glenwyck Farms who sends their children to Westlake Academy instead of Carroll ISD's traditional campuses still pays Carroll ISD's tax rate, because the land itself is zoned to Carroll ISD regardless of where the kids attend school. School choice inside Westlake is genuinely flexible. The tax bill tied to the address is not.
Before you write an offer
A few checks worth doing on any specific Westlake address before a buyer gets attached to a number they saw on a portal:
- Confirm the exact ISD for the parcel through the Tarrant Appraisal District's own records rather than assuming by neighborhood name, since some communities near shared boundaries can include lots on either side of a district line.
- Ask for the HOA's current resale certificate fee and annual dues before assuming the community's reputation tells you the full carrying cost.
- Model the ISD tax line separately from the town's rate, since the school district portion is almost always the larger and more variable of the two.
- Revisit the math each fall, since ISD rates are set annually and Carroll, Keller, and Northwest have each adjusted theirs within the past year.
None of this makes Westlake a high-tax market. Its town rate genuinely is one of the lowest in the region, and that part of its reputation holds up under scrutiny. What the reputation misses is that the town rate was never the whole bill. The school district line running through town, invisible on every listing sheet, decides more of the total than the town itself does.
If you are comparing specific Westlake addresses and want the real number, not the headline one, before you write an offer, the Jeannie Anderson Group can pull the exact ISD, rate, and HOA detail for the parcel you're considering. Request a Luxury Home Valuation and we'll walk you through what a specific address actually costs to own, not just what it costs to buy.
