Search "Castle Hills homes for sale" and the results will show you one neighborhood. Drive it and you will feel one neighborhood too, the same live oaks, the same 1950s ranch houses next to newer rebuilds, the same easy five minutes to NW Military Highway. But pull the tax record on two houses a half mile apart and you will find they answer to different city halls, different police departments, and in some cases different school districts. The line between them is a road most buyers drive across without noticing: Lockhill Selma Road.
One name, two governments
The City of Castle Hills is not a marketing term. It is an actual incorporated municipality, chartered in 1951, and its boundaries are specific: Jackson-Keller Road on the south, Lockhill Selma Road on the north, Blanco Road on the east, and the old T&NORR rail tracks on the west. That footprint covers about 2.5 square miles. Everything inside those four lines answers to the City of Castle Hills. Everything outside them, including most of the area locally known as Castle Hills Forest, answers to the City of San Antonio instead.
This matters because real estate listings, portals, and even some agents use "Castle Hills" loosely to describe both. A longtime Castle Hills City Councilmember, Denise Haley, has made a point of clarifying this distinction for residents: Castle Hills Forest is not the same thing as the City of Castle Hills, and Lockhill Selma Road is the dividing line between them. If you are comparing two listings that both say "Castle Hills" in the description, that single sentence should change how you read every number that follows.
What the incorporation actually buys you, and costs you
Despite its small footprint and a population under 4,000, the City of Castle Hills funds and runs its own police department, its own fire department, and its own public works and sanitation operations. That is unusual for a city this size, and it is the reason response times and service levels inside the boundary tend to run differently than in the surrounding unincorporated pockets.
It also means an added layer of property tax that a home just across Lockhill Selma Road does not carry. Reporting on the area puts the added city rate at roughly $0.54 per $100 of assessed value, stacked on top of the county and school district rates every Bexar County property already pays. For context, one detailed breakdown of the tax stack in this corridor lists a combined rate near $1.9968 per $100 of valuation once city, county, and school district levies are added together. On a home assessed at $450,000, the city's own $0.54 slice alone works out to roughly $2,430 a year, money that would not appear on the tax bill of a similarly priced home sitting fifty yards north of the boundary in unincorporated San Antonio.
None of this shows up on a portal's price-per-square-foot chart. It shows up on the tax bill you get the first January after closing.
One city hall, one permit office, one set of rules
The tax difference is the part buyers eventually notice. The permitting difference is the part that catches people during a renovation. The City of Castle Hills runs its own Building Permit Office out of City Hall at 209 Lemonwood Drive, and it has its own requirements: a licensed trade holder must pull the permit, not just a general contractor, and unsigned or incomplete applications are not processed. Certificates of occupancy for any change in business use, ownership, or location go through the same office, with its own inspection sequence for building, fire, and health compliance.
Cross Lockhill Selma Road into the San Antonio side and you are back under the city of San Antonio's permitting system instead, a separate office with its own timeline and its own fee schedule. If you are budgeting a kitchen remodel or an addition as part of your purchase decision, "Castle Hills" tells you nothing about which permit office you will be dealing with. The address does.
The school district line most buyers assume doesn't exist
Because both areas share the Castle Hills name, buyers often assume they share a school district too. They don't, or at least not automatically. Property records for a home on Lockhill Selma Road itself, tagged to Castle Hills, show assignment to North East Independent School District. Meanwhile, real estate profiles of the broader Castle Hills Forest area list San Antonio ISD as the applicable district for parts of that footprint. This is exactly the kind of detail that needs to be verified address by address rather than assumed from a neighborhood name, since a few hundred feet can be the difference between districts.
What actually doesn't change at the line
Here is the part that makes this more than a bureaucratic footnote. None of the civic boundary shows up in how people actually live day to day. Residents on both sides of Lockhill Selma Road shop the same specialty retail, since the City of Castle Hills itself has no big-box stores by design, just smaller shops along the NW Military Highway corridor. They eat at the same handful of local spots that straddle the line: the Mexican steakhouse Tu Asador, sushi spot Sushihana, and Latin sandwich counter Bill's on the Castle Hills side, with North Salado Village anchoring retail on the Forest side. They read the same community newsletter, the Castle Hills Reporter, and show up to the same events organized by the Castle Hills Community Organization, from the spring Easter egg hunt to the Fiesta parade each April.
That is the real texture of the place, and it is genuinely shared. What is not shared is who taxes you, who polices your street, who signs off on your remodel, and in some pockets, which school your kids are zoned for. A neighborhood can feel like one community and still be two legal jurisdictions. Castle Hills is a clean example of exactly that split.
Why the median price you saw is probably blending both sides
One more wrinkle worth flagging before you write an offer. Portal-level market snapshots for "Castle Hills" typically pull from the 78213 ZIP code as a whole, which spans both the incorporated city and adjacent unincorporated pockets. As of mid-July 2026, one snapshot showed 23 active Castle Hills listings with a median list price of $499,900 and an average of 56 days on market. A separate snapshot taken around the same period showed 20 active listings with a median list price of $517,475 and 63 days on market, alongside just 2 recent sales at a median of $488,500. That gap between two same-week counts of the same named neighborhood is a sign of how thin and blended this data really is. With only a couple dozen active listings feeding either number, and two different tax jurisdictions folded into a single ZIP-level average, the headline median is a blend, not a like-for-like comparison. A $500,000 listing inside the incorporated city and a $500,000 listing in the Forest can carry meaningfully different total costs of ownership even though the sale price line looks identical.
A short checklist before you write the offer
- Pull the specific parcel from the Bexar County Appraisal District, not just the neighborhood name, to confirm which taxing entities actually apply to that address.
- Ask whether the property sits inside the incorporated City of Castle Hills boundary (Jackson-Keller, Lockhill Selma, Blanco, and the old rail line) or outside it.
- Confirm the assigned school district directly with the district office rather than relying on a listing description.
- If renovation is part of your plan, call the relevant permit office, Castle Hills City Hall on Lemonwood Drive or the City of San Antonio's permitting department, before you budget the work.
- Ask your lender to run the full tax stack, not just an estimated rate, since the city, county, and school district lines are levied separately and add up differently depending on which side of the road you are on.
FAQ
Is Castle Hills Forest inside the City of Castle Hills? Only partly. The area known locally as Castle Hills Forest straddles Lockhill Selma Road. The portion south of that road falls inside the incorporated City of Castle Hills. The portion north of it is part of the City of San Antonio.
Does living inside the incorporated city guarantee faster emergency response? The City of Castle Hills funds its own dedicated police and fire departments rather than relying on county or San Antonio coverage, which is part of why residents inside the boundary experience a different service model than those just outside it. Specific response time comparisons should be confirmed directly with the department.
Will my property tax bill definitely be higher inside the city limits? Being inside the incorporated boundary adds a city tax rate on top of county and school levies. Whether that makes your total bill higher than a comparable home outside the line depends on which school district and taxing entities apply to that specific parcel, so it is worth confirming with the county appraisal district rather than assuming based on the neighborhood name alone.
If you are comparing homes across this boundary and want someone to run the actual numbers, jurisdiction, and tax stack on a specific address before you write an offer, Aden Stiles can walk through it with you. Let's Connect.
