Ask an agent which Austin-area city has the lowest property tax rate and the answer comes fast: West Lake Hills, sitting somewhere around 1.78 percent, well under the roughly 1.97 to 2.07 percent a homeowner pays inside Austin's city limits. It's true. It's also the kind of true that leads buyers to a wrong conclusion, because the rate and the bill are not the same number, and in West Lake Hills they can diverge by tens of thousands of dollars a year.
The lower rate exists for a real, traceable reason. So does the fact that a meaningful share of homes in this city still run on septic systems rather than municipal sewer, decades after most of the surrounding metro connected. Those two facts are not a coincidence sitting next to each other. They're the same decision, showing up in two different places on your closing statement.
Why the rate is actually low
West Lake Hills sits entirely within Eanes ISD, whose board adopted a tax rate of $0.8322 per $100 of value for the 2025-26 fiscal year, a figure that has been declining gradually over the past decade. Austin ISD, by comparison, is running closer to $0.90 per $100. That difference alone tilts West Lake Hills toward the lower end.
The bigger driver is what isn't stacked on top. West Lake Hills is its own incorporated city, a Texas type-A general law municipality with its own council, its own code of ordinances, and its own small municipal property tax rate, but that municipal rate is a fraction of what the City of Austin levies on properties inside its limits. A homeowner in Austin proper pays the Austin ISD rate, the City of Austin's own rate, Travis County, Austin Community College, and a hospital district rate all at once. A West Lake Hills homeowner pays Eanes ISD, Travis County, ACC, the hospital district, and a much smaller municipal line. Fewer full-size layers, lower blended rate. That's the whole mechanism, and it's not a loophole. It's just what a smaller city with its own tax base and no shared city-county overlap looks like on paper.
Where the rate stops mattering
Here's the part the headline skips. Rate is one side of the equation. Value is the other, and in West Lake Hills the value side does almost all the work.
| Austin city limits (AISD) | West Lake Hills (Eanes ISD) | |
|---|---|---|
| School district rate | roughly $0.90 per $100 | $0.8322 per $100 |
| City property tax | City of Austin's own rate | West Lake Hills' own, much smaller rate |
| Typical effective combined rate | roughly 1.97% to 2.07% | roughly 1.78%, lowest in the metro |
A West Lake Hills home with a $1.5 million market value and no homestead cap yet in place lands around a $24,000 annual tax bill, even with that lower rate, because the rate is being applied to a much bigger number. One tax-data estimate puts the median annual bill in West Lake Hills at $24,700 against a median home value of $1.83 million. Compare that to the roughly $10,800 average bill on a $515,000 taxable homestead inside Austin city limits, and the "lowest rate in the metro" framing starts to look like it's answering a different question than the one most buyers are actually asking, which is what they'll owe every January.
None of this is a trick. It's arithmetic. But it means the rate comparison that gets repeated in listing conversations is only useful once you've already priced the home, not before.
The other half of the same decision
Rewind to why West Lake Hills carries such high per-lot values in the first place, and you land on density, or the deliberate lack of it. The city's own code requires at least a quarter acre per bedroom for any lot served by an on-site sewage facility, and at least a full acre for certain two-family lots. Those aren't zoning suggestions. They're baked into the sanitation ordinance itself, and they exist because most of West Lake Hills was never connected to central sewer and, by the city's own account, isn't going to be.
In a 2024 letter to the Austin City Council regarding the Bee Cave Road corridor, the city stated plainly that the majority of West Lake Hills residents have septic and will continue to, citing the desired character of the community and economics of extending service to a low-density area. That's a city choosing to keep lots large rather than build out a sewer network, which is exactly the choice that keeps supply limited and per-lot values high, which is exactly what keeps the effective tax rate looking favorable against a much bigger bill.
What that means for you at the closing table
If you're buying or selling a home on septic in West Lake Hills, a few specifics matter more here than they do in a neighborhood on city sewer:
- Pump-out timing is regulated, not optional. City ordinance sets a mandatory pump-out interval of once every 3 years for residential systems inside the Edwards Aquifer Recharge Zone, and once every 7 years for systems outside it. Ask for the last pump-out date and where the property sits relative to the recharge zone before you waive an inspection contingency.
- A septic system is a maintained asset, not a fixed one. Systems get inspected, permitted, and sometimes replaced, and the paperwork transfers with the property. If a seller can't produce recent inspection or maintenance records, that's worth raising before you're under contract, not after.
- The few pockets of West Lake Hills that are on central sewer aren't frozen either. The city revised its residential and non-residential wastewater rates effective August 29, 2024, a rate period that runs through August 28, 2026, and added a new $35 monthly fee for grinder-pump customers starting that November. If a listing mentions "city sewer," it's worth confirming which rate structure and fee schedule actually applies, and whether a new rate period is about to take effect.
None of this is disclosed the way a school rating or a homestead exemption is. It surfaces when an inspector asks where the tank is, and by then you want to already know the answer.
The "median price" problem, one more layer down
There's a second place where a single headline number hides more than it shows, and it compounds the tax story rather than sitting apart from it. Three data points gathered within a few months of each other in 2026 show just how much the definition matters. Trailing twelve months of closed sales through April 2026 put the median at roughly $2.82 million. A modeled estimate of typical value as of June 2026 sat lower, around $2.21 million, and was itself down 8 percent from a year earlier. A snapshot of homes actively listed for sale in May 2026, not sold, showed a median asking price above $3.5 million.
Those aren't three disagreeing sources so much as three different questions wearing the same label. A year of closed transactions versus a computer-modeled estimate versus what sellers are asking for right now are not the same measurement, and in a market this thin, with well under 30 active single-family listings at any given time by most local counts, a handful of closings can swing any one of these numbers hard in either direction. Before you compare West Lake Hills to Tarrytown or another central Austin neighborhood on price, it's worth asking which of these three questions the number you're holding is actually answering.
Frequently asked questions
Is West Lake Hills unincorporated? No. It's its own incorporated city within Travis County, with a city council that adopts its own ordinances and its own, much smaller property tax rate on top of the county, school district, and ACC rates. You'll sometimes see it described as unincorporated because it doesn't sit inside Austin's city limits, but that's a different thing entirely.
If the tax rate is lower, will I pay less than I would in Austin? Not necessarily, and often not at all. The rate is lower, but it's applied to home values that run well above the metro median, so the dollar amount on the bill is frequently higher than what a comparable Austin homeowner pays, even with the rate advantage.
Do I need to worry about septic if I'm buying here? If the property isn't on the small central sewer service area, yes. Ask when the system was last pumped, whether the lot sits inside the Edwards Aquifer Recharge Zone, and whether maintenance records exist. It's a normal, well-documented part of owning in this city, not a red flag by itself, but it is a question worth asking before you're past your option period.
Every one of these numbers changes depending on the exact street, the exact lot, and the exact system on that lot. That's precisely the kind of detail that doesn't show up cleanly in a portal search, and it's the reason a conversation with someone who tracks this market closely is worth more than another spreadsheet of medians. If you're weighing West Lake Hills against another central Austin neighborhood, Ace Team ATX can walk through what a specific address actually costs to own, not just what its listing price implies. Let's find your Austin home.
