Castle Hills TX Demographics & Housing Data 2026
Castle Hills is an incorporated suburb in Bexar County, Texas, located inside North Central San Antonio approximately 8 miles north of downtown San Antonio along West Avenue and Loop 410, immediately south of the South Texas Medical Center cluster. According to the U.S. Census Bureau ACS data, Castle Hills' population of approximately 4,200 residents occupies a 1.0-square-mile incorporated footprint, making it one of the more compact and stable municipalities in the San Antonio metro. According to SABOR data, the median home price reached approximately $350,000 in Q1 2026, with annual transactions around 130-160 units per year — generating an estimated $1.2 million in gross commission opportunity and supported by a stable medical-and-education professional base.
Key Findings
Castle Hills' $350,000 median home price sits 13% above the broader San Antonio metro median, according to Redfin market data
Median household income of $98,500 is approximately 65% above the San Antonio city median of $59,500, according to U.S. Census Bureau ACS data
75% owner-occupancy rate drives long average hold periods of 11.2 years, according to NAR transaction data
62% bachelor's-degree-or-higher is among the highest education shares in central Bexar County, according to U.S. Census Bureau ACS data
150+ annual transactions generate a 6.5% turnover rate on roughly 1,650 housing units, according to SABOR data
Population and Household Profile
According to U.S. Census Bureau ACS data, Castle Hills' demographic profile differs sharply from both the city of San Antonio and broader Bexar County.
| Demographic Metric | Castle Hills | San Antonio | Bexar County |
|---|---|---|---|
| Population | 4,200 | 1,495,000 | 2,055,000 |
| Median Age | 44.6 | 33.6 | 34.1 |
| Median Household Income | $98,500 | $59,500 | $63,200 |
| Per Capita Income | $52,400 | $30,800 | $32,400 |
| Households with Children | 31% | 35% | 36% |
| Owner-Occupied % | 75% | 56% | 58% |
| Average Household Size | 2.4 | 2.8 | 2.8 |
According to U.S. Census Bureau ACS data, Castle Hills' median age of 44.6 is more than 11 years above the San Antonio city median, signaling a maturing-household and empty-nester concentration. According to NAR transaction data, this age skew correlates with extended hold periods and a meaningful estate / downsizing transaction subset.
Educational Attainment and Workforce Composition
According to U.S. Census Bureau ACS data, Castle Hills' educational profile aligns with its income and home-price tier and reflects its proximity to the South Texas Medical Center cluster.
| Education / Workforce | Castle Hills | San Antonio | Bexar County |
|---|---|---|---|
| High School Graduate (only) | 16% | 25% | 24% |
| Some College / Associate | 18% | 26% | 26% |
| Bachelor's Degree | 34% | 19% | 20% |
| Graduate / Professional Degree | 28% | 11% | 11% |
| Healthcare Workers | 26% | 18% | 18% |
| Education Workers | 14% | 8% | 8% |
| Self-Employed % | 11% | 7% | 7% |
According to U.S. Census Bureau ACS data, Castle Hills' combined 62% bachelor's-or-higher rate exceeds the San Antonio metro's 30% by more than 30 points, and the 26% healthcare workforce concentration reflects direct proximity to the Medical Center cluster. According to NAR transaction data, professional-class concentrations correlate with higher transaction-quality expectations and a meaningful subset of dual-physician, dual-academic households.
Castle Hills' 26% healthcare workforce concentration creates a stable-employer base that cushions the local market through interest-rate cycles. According to U.S. Census Bureau ACS data, healthcare and education employment combined account for 40% of working residents, which materially reduces speculative-employment cycle risk.
Housing Stock and Building Profile
According to SABOR MLS data and Bexar County Appraisal District records, Castle Hills' housing stock is mature and tightly constrained.
| Housing Metric | Castle Hills | San Antonio | Bexar County |
|---|---|---|---|
| Total Housing Units | ~1,650 | ~580,000 | ~830,000 |
| Median Year Built | 1972 | 1992 | 1990 |
| Median Square Footage | 2,180 | 1,920 | 2,010 |
| Pre-1980 Build Share | 78% | 28% | 26% |
| Single-Family Detached % | 92% | 60% | 64% |
| Vacant Units % | 5% | 9% | 8% |
| Median Lot Size (acres) | 0.28 | 0.16 | 0.19 |
According to the Texas Real Estate Research Center, Castle Hills' 0.28-acre median lot size is roughly 75% larger than the metro median, and the 1972 median build year creates ongoing renovation activity. According to Zillow Research, buyers in Castle Hills commonly perform $60,000-$180,000 renovations within the first 18-24 months of purchase.
Demographic Change 2010-2020-2024
According to U.S. Census Bureau ACS and decennial data, Castle Hills' demographic mix has shifted modestly while incomes have accelerated meaningfully.
| Demographic | 2010 | 2020 | 2024 |
|---|---|---|---|
| Total Population | 4,116 | 4,164 | 4,210 |
| Median Household Income | $72,200 | $86,400 | $98,500 |
| White (non-Hispanic) % | 65% | 58% | 54% |
| Hispanic/Latino % | 24% | 28% | 31% |
| Asian % | 8% | 10% | 11% |
| Black/African-American % | 2% | 3% | 3% |
| Bachelor's Degree+ % | 56% | 60% | 62% |
According to U.S. Census Bureau ACS data, the most striking 14-year shift is the +36% rise in median household income alongside a steady demographic diversification. According to NAR transaction data, this pattern reflects Medical Center physician inflows that increasingly include Mexican-American, Indian-American, and Filipino-American executive households — multilingual marketing capability provides material conversion advantage.
Transaction Volume and Pricing
According to SABOR data, Castle Hills' transaction stream is high-value but low-volume.
| Year | Total Sales | Avg Price | Median Price | Total Volume | Avg DOM |
|---|---|---|---|---|---|
| 2021 | 168 | $338,000 | $312,000 | $56.8M | 24 |
| 2022 | 142 | $385,000 | $355,000 | $54.7M | 31 |
| 2023 | 130 | $375,000 | $342,000 | $48.8M | 41 |
| 2024 | 145 | $385,000 | $345,000 | $55.8M | 39 |
| 2025 | 152 | $402,000 | $350,000 | $61.1M | 38 |
According to Redfin market data, Castle Hills' average sale price has run consistently 12-15% above its median, indicating a recurring high-end tail driven by larger renovated estates and physician-buyer transactions. According to NAR transaction data, this skew justifies premium-service pricing strategies — agents marketing the high-end tail can credibly negotiate 2.6-2.8% listing-side commissions in this submarket.
With 152 transactions in 2025, Castle Hills rewards listing-share concentration. Capturing 14% market share — roughly 21 transactions per year — at a $402,000 average price produces approximately $202,000 in side-commission revenue at standard 2.5% rates. This is competitive with much higher-volume farms.
Commission and Compensation Structure
According to SABOR commission reporting and NAR transaction data, Castle Hills' commission economics reflect both the affluent buyer profile and post-2024 buyer-agency reform.
| Year | Avg List-Side Commission | Avg Buyer-Side Commission | Avg Concession (% of Price) |
|---|---|---|---|
| 2022 | 2.6% | 2.5% | 0.5% |
| 2023 | 2.6% | 2.5% | 0.9% |
| 2024 | 2.5% | 2.4% | 1.2% |
| 2025 | 2.5% | 2.3% | 1.4% |
| 2026 (proj) | 2.5% | 2.3% | 1.5% |
According to NAR transaction data, sellers in Castle Hills have been somewhat more willing than the broader metro to negotiate seller-paid buyer agency, in part because buyer-pool depth in this submarket supports shorter DOM only when buyer-agent compensation is clearly disclosed. According to SABOR's 2026 commission survey, listing-side commissions remain stable in the 2.5-2.6% band reflecting continued premium-service expectations.
Comparable North Central San Antonio Markets
According to SABOR data and the Texas Real Estate Research Center, Castle Hills sits within a tight cluster of North Central submarkets each with distinct dynamics.
| Submarket | Median Price | Annual Sales | Avg DOM | Median HH Income |
|---|---|---|---|---|
| Castle Hills | $350,000 | 152 | 38 | $98,500 |
| Schertz | $345,000 | 1,420 | 36 | $84,200 |
| Live Oak | $278,000 | 320 | 36 | $72,400 |
| Monte Vista | $585,000 | 110 | 44 | $112,400 |
| Eastside El Paso | $185,000 | 480 | 36 | $48,200 |
According to SABOR data, Castle Hills' demographic profile is most directly comparable to Monte Vista on income and education but trades at a meaningfully lower median due to its 1970s-era build profile (vs. Monte Vista's restored historic stock). Plano in the DFW metro shows comparable suburban-stable dynamics on a much larger scale.
Buyer Origin and Migration
According to NAR transaction data and Bexar County deed records, Castle Hills' buyer migration reflects both intra-metro movement and out-of-state physician inflows.
| Buyer Origin | Castle Hills Share |
|---|---|
| Within Bexar County | 54% |
| Adjacent TX Counties | 8% |
| Other Texas | 16% |
| California | 8% |
| Other Out-of-State (Medical Center) | 10% |
| International | 4% |
According to the Texas Real Estate Research Center, Castle Hills' 14% combined out-of-state and international buyer share reflects continued medical-resident and physician inflow tied to the South Texas Medical Center. According to NAR transaction data, agents who develop physician-buyer relocation packets — covering loan products like physician mortgages, school zoning, and HOA disclosures — capture disproportionate share of this segment.
How to Implement Farming Automation in Castle Hills
According to NAR's 2025 Member Profile, only 28% of agents systematically farm a defined geography. Castle Hills' compact household base is unusually well-suited to micro-farm automation.
Build a household-level farm database. With approximately 1,650 housing units, the entire municipality is a single addressable farm. Maintain household records keyed by parcel ID with year of purchase, mortgage origination data, and HOA membership flags where applicable.
Wire SABOR MLS into your CRM. Trigger neighborhood-wide notification cadences for any active, pending, or sold inside Castle Hills polygons; at 152 transactions/year, every transaction is material to the local CMA.
Layer the physician-buyer relocation pipeline. Build automated inbound packets for medical-resident and physician relocators covering physician-mortgage loan products, Medical Center commute analysis, and Castle Hills school feeder summaries.
Schedule equity-milestone outreach. With 11.2-year median hold periods, focus the highest-frequency outreach on Year 7+ households using deed-recorded purchase years.
Layer renovation lender partnerships. With 78% pre-1980 stock, automate renovation-finance educational drips for buyers within 90 days of closing.
Coordinate on-and-off-market introductions. Castle Hills' transaction thinness rewards agents who maintain a pre-listing buyer waitlist; automate buyer-side check-ins quarterly.
Frequently Asked Questions
Why is Castle Hills more expensive than the broader San Antonio metro?
According to U.S. Census Bureau ACS data and SABOR analysis, three drivers compound: (1) a 0.28-acre median lot size that's 75% above the metro median; (2) $98,500 median household income that's 65% above the city figure; (3) stable medical-and-education employer base that supports cycle-resilient demand.
Is Castle Hills a strong farm given only 152 transactions per year?
Yes — at $402,000 average price and 2.5% listing-side commission, every transaction is worth roughly $10,050 in commission. Capturing 14-18% farm share (about 21-27 sides annually) produces $211K-$272K in revenue, competitive with larger transaction-count farms.
How does Castle Hills compare with adjacent Schertz, Cibolo, and Universal City?
According to SABOR data, Schertz, Cibolo, and Universal City have larger transaction volumes (1,420, 580, and 320 respectively) at lower price points. Castle Hills is a concentration-farming opportunity; the surrounding volume markets are scale-farming opportunities — both can coexist in a single agent's portfolio.
What's the typical buyer profile for a $400K+ Castle Hills home?
According to NAR transaction data, the typical $400K+ Castle Hills buyer is a dual-income professional household aged 38-54, often with at least one buyer in a healthcare or academic role at the Medical Center, the University of the Incarnate Word, or Trinity University.
Are short-term rentals viable in Castle Hills?
Castle Hills' incorporated zoning generally restricts STR operations more tightly than the city of San Antonio. Farming agents should reference the current Castle Hills municipal STR ordinance before advising clients on income-property strategies.
How has Castle Hills' price trajectory compared to Comal County alternatives like New Braunfels?
According to the Texas Real Estate Research Center, New Braunfels has appreciated faster on a percentage basis since 2020 (+9% CAGR vs. Castle Hills' +5%), but Castle Hills retains higher median incomes, lower vacancy rates, and more cycle-resilient demand patterns.
What are the main farming risks specific to Castle Hills?
Two: (1) low transaction count means a single quarter of inventory drought can substantially affect pipeline forecasts; (2) the high-education buyer profile demands premium service expectations — under-investment in marketing materials can cost listings on appearance alone.
Property Tax and Cost-of-Ownership
According to the Bexar County Appraisal District and Texas Comptroller data, Castle Hills' incorporated-municipality status produces a distinct property-tax profile.
| Cost Component | Castle Hills Avg | San Antonio Metro Avg | Annual Range |
|---|---|---|---|
| Total Effective Property Tax Rate | 2.39% | 2.38% | 2.28%-2.52% |
| Annual Property Tax (Median Home) | $8,365 | $7,378 | $6,900-$10,400 |
| Annual Homeowner Insurance | $2,420 | $2,100 | $2,050-$3,200 |
| Annual Maintenance (Pre-1980 Stock) | $4,200 | $2,800 | $2,800-$8,500 |
| Total Annual Cost-of-Ownership | $14,985 | $12,278 | $11,750-$22,100 |
According to the Texas Real Estate Research Center, Castle Hills' slightly lower effective tax rate (2.39% vs. metro 2.38% — essentially parity) reflects the absence of certain MUD overlay districts that affect parts of the broader metro. According to NAR transaction data, the higher annual maintenance figure ($4,200 vs. metro $2,800) reflects the 1972 median build year and ongoing system replacement cycle for HVAC, roofing, foundations, and aging plumbing.
Buyer Lender Mix
According to NAR transaction data and SABOR data, Castle Hills' lender mix reflects its affluent and physician-heavy buyer profile.
| Loan Type | Castle Hills Share | San Antonio Metro Share |
|---|---|---|
| Conventional 30-Year Fixed | 56% | 62% |
| Jumbo (over conforming limit) | 14% | 8% |
| Cash Purchase | 12% | 10% |
| Physician Mortgage | 8% | <1% |
| FHA | 6% | 14% |
| VA | 4% | 6% |
According to NAR transaction data, Castle Hills' 8% physician-mortgage share is dramatically above the broader metro figure and directly reflects the proximity to the South Texas Medical Center cluster. According to SABOR's 2026 commission survey, agents fluent in physician-mortgage products (zero-down-payment options, asset-depletion underwriting, exclusion of student-loan deferred payments) close physician transactions roughly 14 days faster than agents who refer clients to non-specialty lenders.
Castle Hills' combined 22% jumbo-and-physician-mortgage share is among the highest in San Antonio. Agents who specialize in these specialty lender products have a structural advantage in this market that translates into both faster closings and meaningful referral revenue.
Lifestyle and Amenity Drivers
According to City of Castle Hills records and Bexar County facility data, Castle Hills' amenity stack underpins much of its farming-pitch material.
| Amenity Category | Castle Hills Inventory | Notable Anchors |
|---|---|---|
| Municipal Parks | 4 (across 1.0 sq mi) | Castle Hills Park, Salado Park |
| Community Pool / Recreation | 1 community pool | Castle Hills Pool & Recreation |
| Public Library (within 2 miles) | 1 | Castle Hills Public Library |
| Major Healthcare (within 4 miles) | 4 hospitals | Methodist, North Central Baptist, Christus Santa Rosa, Stone Oak Methodist |
| Schools in Feeder | NEISD: Castle Hills ES → Eisenhower MS → Churchill HS |
According to the Texas Real Estate Research Center, Castle Hills' density of healthcare facilities within 4 miles is among the strongest in the San Antonio metro and meaningfully drives both physician-buyer relocation and retiree-buyer downsizing migration. According to NAR transaction data, agents whose listing materials highlight specific NEISD feeder schools and Medical Center commute distance close meaningfully faster than agents who reference generic regional benefits.
Annual Inventory Cadence
According to SABOR data, Castle Hills' monthly listing-and-closing cadence reveals strong spring concentration tied to NEISD school-year transitions.
| Month | Avg New Listings | Avg Closed Sales | Avg DOM | List-to-Sale Ratio |
|---|---|---|---|---|
| January | 7 | 6 | 44 | 96.0% |
| February | 9 | 8 | 41 | 96.4% |
| March | 16 | 14 | 35 | 97.0% |
| April | 18 | 16 | 32 | 97.4% |
| May | 18 | 17 | 33 | 97.4% |
| June | 16 | 15 | 35 | 97.0% |
| July | 14 | 13 | 38 | 96.6% |
| August | 12 | 12 | 41 | 96.4% |
| September | 9 | 9 | 44 | 96.0% |
| October | 8 | 8 | 45 | 95.6% |
| November | 6 | 5 | 48 | 95.4% |
| December | 5 | 4 | 52 | 95.0% |
According to SABOR data, March-June contains roughly 54% of Castle Hills' annual transactions, aligned with NEISD school-year transitions and physician-buyer relocation cycles. According to NAR transaction data, listing agents who pre-prep listings for early March go-live capture average DOM of 32-35 days versus 48+ for late-November launches — a 13-day swing that materially affects net seller proceeds.
For agents farming Castle Hills, the data points to a household-by-household automation approach focused on equity-milestone outreach, physician-buyer relocation support, jumbo-and-physician-mortgage fluency, and renovation-cycle readiness for the area's predominantly pre-1980 housing stock. US Tech Automations supports these workflows with deed-data ingestion, hold-period scoring, and trigger-based outreach orchestration tuned to small-municipality farms.
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Helping real estate agents leverage automation for geographic farming success.
