The immediate tension in ZIP 78413 is a modest asking-rent rebound alongside softer resale pricing. Zillow’s typical observed asking-rent index, blended across rental types, was $1,237 in June 2026, up 2.63% from the same month a year earlier. It remained below the wider-context Zillow figures: the Corpus Christi city scope was $1,414.56, the Nueces County scope was $1,415, and the Corpus Christi, TX metro scope was $1,422. Those city, county, and metro values are comparators rather than substitutes for ZIP evidence. Zillow’s measure is an asking-rent index, so it does not describe signed leases, occupied homes, or a particular available unit.
Bedroom figures should be read as modelled estimates, not measured bedroom rents. Scaling ZIP ZORI through the local HUD bedroom ladder produces estimated monthly levels of $934 for a studio, $1,012 for one bedroom, $1,237 for two bedrooms, $1,626 for three bedrooms, and $1,860 for four bedrooms. The ZIP-wide index is 90.6% of the local two-bedroom HUD standard. HUD fair-market-rent standards are administrative, bedroom-specific benchmarks; they are not asking rents. The modelled ladder is therefore useful for maintaining a locally consistent size relationship, but it cannot establish the achieved rent, concession level, utility treatment, or condition premium for any individual property.
The matched Census ZCTA offers a different rent universe and a different timing framework. A ZCTA is a statistical area and is not identical to a USPS delivery ZIP. In the ACS 2024 five-year survey, which covers occupied renter homes and includes selected utilities in gross rent, median gross rent was $1,400. That measure should not be merged with Zillow’s current asking-rent index. The ZCTA median household income was $72,815. Applying a 30% rent-to-income calculation to the Zillow index gives required annual income of $49,480; this is arithmetic only, not advice or an applicant qualification rule. ACS counted 2,901 of 5,954 renter households as paying at least 30% of income toward rent, or 48.7%, but that burden statistic cannot prove the payment pressure facing any particular unit or household.
Housing stock and vacancy add a separate supply-side lens. The ZCTA contained 15,713 housing units, of which 13,917 were occupied and 1,796 vacant, producing an 11.4% vacancy rate. Of the vacant homes, 1,024 were classified as for rent. That is an area-level classification rather than confirmation that those homes are currently marketable, comparable, or priced near Zillow’s index. The stock included 9,284 single-family units and 1,655 units in larger multifamily structures, indicating that the housing base is not limited to one structure type. The ZIP vacancy rate is below the Corpus Christi city-context and Nueces County-context vacancy rates, but those wider geographies remain context rather than direct ZIP rental inventory.
The rent history supports caution about treating one current reading as a stable trend. Coverage was complete across 61 Zillow observations. The one-year same-month change was 2.63%, reversing a slightly negative three-year annualized change of 0.10%, while the five-year annualized change was positive at 2.35%. Recent direction therefore breaks from the intermediate soft patch but still fits the longer positive path. Month-to-month changes translated to 4.19% annualized variability, so a single current index level carries less precision than a smooth series would imply. Separately, the historical peak-to-trough decline reached 5.76%, showing that prior rent levels have retreated materially from earlier highs. Transparent national discovery ranks were 1,706 for momentum, 2,672 for stability, and 2,486 for the balanced measure, where lower ranks are higher; these are backward-looking discovery measures, not forecasts or investment recommendations.
The direct rolling-three-month Redfin ZIP resale observation tells a more cautious for-sale story, not a rental-transactions story. Median sold price was $269,439, down 3.83% year over year, with 71 homes sold and a median 39 days on market. Inventory stood at 154 homes and months of supply at 6.6. Sellers averaged 98.11% of list price, while 7.25% of sales closed above list. These resale signals sit in a distinct evidence universe from Zillow and ACS. They show a ZIP for-sale market with lower median pricing and less-than-list closing on average, rather than evidence about lease execution, tenant demand for a specific property, or rental operating economics.
Cross-source screening sharpens the central tension without resolving it. Annualized ZIP ZORI divided by the Redfin median sold price equals 5.51%. This is only a screening ratio joining an asking-rent index to a resale median; it is not a cap rate, net return, expected return, or property yield. The latest rent increase and the positive five-year rent history support a different signal from the resale price decline, elevated months of supply, and below-list average sale outcome. Meanwhile, the income screen sits below median household income, but the ACS burden share remains substantial. Together, the evidence supports neither a simple strength narrative nor a simple weakness narrative.
Several limits remain material. Zillow is a blended ZIP asking-rent index, ACS is a lagged five-year ZCTA survey of occupied renters, HUD is an administrative standard, and Redfin is a rolling resale observation; their dates, samples, and definitions differ. Property-level review would need current same-bedroom asking comparables, lease term and concession details, included utilities, fees, unit condition, exact location, and evidence that advertised availability is still active. A resale review would separately need recent comparable sales, listing histories, and the relationship between list and closed prices. Those checks determine whether the ZIP-level tension appears in a specific property rather than merely in these aggregate series.
","findings":[{"body":"ZIP asking rent increased over the latest same-month year, yet the three-year annualized history was slightly negative while the five-year history remained positive. The series also had meaningful month-to-month variability and a prior drawdown. That combination makes the current Zillow reading useful as a snapshot, but less reliable as a standalone trend statement.","title":"Rent has risen recently, but the multi-year path is uneven"},{"body":"The arithmetic income screen based on current Zillow asking rent falls below the ZCTA median household income, but ACS reports that nearly half of renter households paid at least 30% of income toward rent. The figures describe different populations and concepts. They do not determine affordability for an individual household, lease, or unit.","title":"Area affordability signals are mixed across survey measures"},{"body":"The direct ZIP resale observation shows a year-over-year decline in median sold price, multiple months of supply, and average closings below list price. Those signals contrast with the recent improvement in Zillow asking rent. Because Redfin measures for-sale transactions rather than rentals, the contrast is a market-screen tension, not proof of a causal relationship.","title":"Resale evidence challenges a uniformly strong rent narrative"},{"body":"The studio-through-four-bedroom estimates scale the ZIP-wide Zillow index using the local HUD bedroom ladder. This creates a transparent size progression while preserving the distinction between Zillow asking rent and HUD administrative standards. Actual rents can differ because the model does not observe unit quality, lease terms, utilities, concessions, or availability.","title":"Bedroom figures are a consistent model, not observed rent comps"}],"risks":["The Zillow index blends rental types and does not identify the property mix, concessions, utilities, lease length, or unit condition behind the current ZIP-level asking-rent reading.","ACS rent, income, burden, occupancy, and vacancy data come from a five-year ZCTA survey universe, with timing and geography that differ from the current Zillow ZIP market identifier.","The resale median and sale-to-list measures describe recent for-sale transactions only; they cannot establish rental income, expenses, tenant demand, or economics for a specific property.","The modelled bedroom ladder depends on HUD relative standards, so it may not match observed asking rents where property quality, structure type, fees, or utility treatment differs."],"qa":[{"a":"They measure different universes. Zillow is a current ZIP-level typical observed asking-rent index blended across rental types. ACS is a five-year survey of occupied renter homes in the matched ZCTA and gross rent includes selected utilities. A ZCTA is statistical geography, not the same thing as a USPS delivery ZIP.","q":"Why does the Zillow asking-rent index differ from ACS median gross rent?"},{"a":"No. They are modelled monthly estimates created by scaling the ZIP-wide Zillow index through the local HUD bedroom ladder. HUD standards are administrative and bedroom-specific, while Zillow is a blended asking-rent index. The resulting figures do not measure achieved rents or establish pricing for a particular apartment or house.","q":"Are the bedroom rent figures direct market observations?"},{"a":"It is a simple arithmetic screen: annualized Zillow asking rent divided by 30% produces an income amount. It is not financial advice, a tenant-screening rule, or a qualification threshold. Household composition, other obligations, utilities, fees, subsidies, and actual lease terms are outside that calculation.","q":"What does the 30% required-income figure mean?"},{"a":"It divides annualized ZIP Zillow asking rent by the Redfin ZIP median sold price. Because it joins two different aggregate sources and omits financing, taxes, insurance, repairs, vacancy, operating costs, and property characteristics, it is only a cross-source screen. It is not a cap rate, return measure, or property yield.","q":"How should the rent-to-sale screening ratio be interpreted?"}],"sources":[{"key":"apartment_list_time_on_market","name":"Apartment List Time on Market — listing liquidity","release":"Apartment List 2026-07","pulledAt":"2026-08-08","url":"https://www.apartmentlist.com/research/category/data-rent-estimates"},{"key":"apartment_list_vacancy","name":"Apartment List Vacancy Index — rental vacancy","release":"Apartment List 2026-07","pulledAt":"2026-08-08","url":"https://www.apartmentlist.com/research/apartment-list-vacancy-index-methodology"},{"key":"census_zcta_facts","name":"Census ACS five-year — ZCTA housing and income","release":"ACS 2024 5-year ZCTA","pulledAt":"2026-08-08","url":"https://api.census.gov/data/2024/acs/acs5.html"},{"key":"hud_zip","name":"HUD USPS crosswalk and Small Area FMRs — ZIP rent fallback","release":"ZIP-CBSA 2025Q4 + SAFMR FY2026","pulledAt":"2026-07-26","url":"https://www.huduser.gov/portal/datasets/usps_crosswalk.html"},{"key":"realtor_county","name":"Realtor.com Economic Research — county listing inventory","release":"county inventory 2026-06","pulledAt":"2026-07-28","url":"https://www.realtor.com/research/data/"},{"key":"redfin","name":"Redfin Data Center — inventory, days on market, and price cuts","release":"metro tracker through 2026-05-01","pulledAt":"2026-07-26","url":"https://www.redfin.com/news/data-center/"},{"key":"redfin_zip","name":"Redfin Data Center — ZIP resale activity and supply","release":"ZIP rolling 3 months through 2026-06-30; updated 2026-07-03","pulledAt":"2026-08-12","url":"https://www.redfin.com/news/data-center/"},{"key":"zillow_county","name":"Zillow ZHVI and ZORI — county values and rents","release":"county ZHVI/ZORI 2026-06","pulledAt":"2026-07-26","url":"https://www.zillow.com/research/data/"},{"key":"zillow_zori","name":"Zillow ZORI — metro market rents","release":"Metro_zori_uc_sfrcondomfr_sm_sa_month.csv","pulledAt":"2026-07-26","url":"https://www.zillow.com/research/data/"},{"key":"zillow_zori_city","name":"Zillow ZORI — city market rents","release":"zillow_zori_city.csv","pulledAt":"2026-07-29","url":"https://www.zillow.com/research/data/"},{"key":"zillow_zori_zip","name":"Zillow ZORI — ZIP market rents","release":"ZORI ZIP 2026-06","pulledAt":"2026-08-08","url":"https://www.zillow.com/research/data/"}],"history":[{"period":"2021-06-01","rent":1101.272906},{"period":"2021-07-01","rent":1130.423277},{"period":"2021-08-01","rent":1170.749566},{"period":"2021-09-01","rent":1177.991135},{"period":"2021-10-01","rent":1170.998548},{"period":"2021-11-01","rent":1177.775693},{"period":"2021-12-01","rent":1184.100934},{"period":"2022-01-01","rent":1192.235886},{"period":"2022-02-01","rent":1190.132498},{"period":"2022-03-01","rent":1188.266915},{"period":"2022-04-01","rent":1195.929321},{"period":"2022-05-01","rent":1199.245404},{"period":"2022-06-01","rent":1213.866331},{"period":"2022-07-01","rent":1214.74729},{"period":"2022-08-01","rent":1209.980244},{"period":"2022-09-01","rent":1204.346412},{"period":"2022-10-01","rent":1217.217828},{"period":"2022-11-01","rent":1211.845002},{"period":"2022-12-01","rent":1203.435439},{"period":"2023-01-01","rent":1193.028801},{"period":"2023-02-01","rent":1196.451186},{"period":"2023-03-01","rent":1217.843546},{"period":"2023-04-01","rent":1228.654826},{"period":"2023-05-01","rent":1251.01405},{"period":"2023-06-01","rent":1240.885343},{"period":"2023-07-01","rent":1233.248194},{"period":"2023-08-01","rent":1202.855049},{"period":"2023-09-01","rent":1194.479767},{"period":"2023-10-01","rent":1199.647782},{"period":"2023-11-01","rent":1209.234973},{"period":"2023-12-01","rent":1230.556357},{"period":"2024-01-01","rent":1235.713963},{"period":"2024-02-01","rent":1245.007661},{"period":"2024-03-01","rent":1216.451514},{"period":"2024-04-01","rent":1201.376686},{"period":"2024-05-01","rent":1183.714449},{"period":"2024-06-01","rent":1189.927653},{"period":"2024-07-01","rent":1199.121547},{"period":"2024-08-01","rent":1203.38521},{"period":"2024-09-01","rent":1193.916267},{"period":"2024-10-01","rent":1178.970481},{"period":"2024-11-01","rent":1191.349055},{"period":"2024-12-01","rent":1185.940938},{"period":"2025-01-01","rent":1204.444687},{"period":"2025-02-01","rent":1211.754108},{"period":"2025-03-01","rent":1245.785781},{"period":"2025-04-01","rent":1246.662728},{"period":"2025-05-01","rent":1229.52325},{"period":"2025-06-01","rent":1205.394139},{"period":"2025-07-01","rent":1201.81407},{"period":"2025-08-01","rent":1212.835058},{"period":"2025-09-01","rent":1225.59941},{"period":"2025-10-01","rent":1233.457405},{"period":"2025-11-01","rent":1221.491545},{"period":"2025-12-01","rent":1219.023984},{"period":"2026-01-01","rent":1206.559248},{"period":"2026-02-01","rent":1199.064683},{"period":"2026-03-01","rent":1186.040308},{"period":"2026-04-01","rent":1194.154085},{"period":"2026-05-01","rent":1215.243014},{"period":"2026-06-01","rent":1237.090741}],"historySummary":{"pointCount":61,"firstPeriod":"2021-06-01","latestPeriod":"2026-06-01","coverageMonths":61,"coverageRatio":1,"changes":{"1":{"years":1,"startPeriod":"2025-06-01","endPeriod":"2026-06-01","startRent":1205.394139,"endRent":1237.090741,"change":0.026295633083379455,"cagr":0.026295633083379455},"3":{"years":3,"startPeriod":"2023-06-01","endPeriod":"2026-06-01","startRent":1240.885343,"endRent":1237.090741,"change":-0.003057979547752554,"cagr":-0.001020367311249104},"5":{"years":5,"startPeriod":"2021-06-01","endPeriod":"2026-06-01","startRent":1101.272906,"endRent":1237.090741,"change":0.12332804544634834,"cagr":0.023531753100320296}},"maxDrawdown":-0.05758813739941604,"annualizedVolatility":0.04194602727974896,"consecutiveReturnCount":60}}