At $2,362 in June 2026, the 91786 rent snapshot presents a measured tension: Zillow’s ZIP-level ZORI was still rising by 0.9% from the same month a year earlier, yet its recent pace was far below the ZIP’s longer historical growth rate. ZORI is a typical observed asking-rent index blended across rental types, so it describes a market-level asking-rent signal rather than a lease quote for a particular home. The positive current reading therefore needs to be weighed against the slower path visible in the ZIP’s own rent history and the separate resale evidence discussed below.
The backward-looking Zillow history breaks from, rather than confirms, the stronger longer path. The one-year same-month annualized rent change was 0.9%, compared with 1.7% for the three-year measure and 4.0% for the five-year measure. Monthly change patterns produced 3.0% annualized variability, which supports some confidence that the current index is not merely an isolated spike but does not establish a future direction. Separately, the maximum drawdown was 3.4%, showing that prior asking-rent levels did retreat during the observed period. Coverage was 100%. The reported national discovery ranks among history-eligible ZIPs were 1,854 for momentum, 1,604 for stability, and 2,006 for the balanced measure; lower ranks are higher. These are descriptive discovery measures, not forecasts or investment recommendations.
The label 91786 is both a Zillow ZIP market identifier and a Census ZCTA match. A ZCTA is a statistical area and is not identical to a USPS delivery ZIP. In the matched ACS 2024 five-year survey, median gross rent was $1,969, about 20.0% below the current ZORI. ACS median gross rent is a five-year survey of occupied renter homes and includes selected utilities, so it is not interchangeable with a current asking-rent index. HUD FY2026 places the local two-bedroom FMR/SAFMR standard at $2,201, with ZORI 7.3% higher; HUD FMR/SAFMR is an administrative bedroom-specific standard, not asking rent. Scaling ZIP ZORI using that local HUD ladder yields modelled, not measured, bedroom estimates of $1,816 for a studio, $1,907 for one bedroom, the ZORI-equivalent level for two bedrooms, $3,125 for three bedrooms, and $3,771 for four bedrooms.
Household-income and burden measures introduce a second constraint on the rent reading. The matched ZCTA’s median household income was $92,458, while the arithmetic 30% required-income screen for a $2,362 monthly rent is $94,480. That screen is arithmetic, not advice or an applicant qualification rule; it simply compares annualized asking rent with an income benchmark. In the ACS renter population, 5,536 renter households, or 52.2%, were recorded as spending 30% or more of income on gross rent. This burden measure includes the ACS gross-rent definition and cannot prove what any particular available unit costs, includes, or requires from a renter.
The matched ZCTA had a housing stock of 20,193 units, with renter-occupied homes representing 54.1% of occupied units. Census vacancy was 2.9%, and 265 vacant units were classified as available for rent. Those counts frame the broad housing and rental base behind the ACS survey, but they are not a real-time listing inventory and do not establish vacancy, concessions, or turnover at a specific property. The relatively large renter share makes the distinction between a ZIP asking-rent index and occupied-home survey rents especially important: the two measures cover related populations but answer different questions.
Wider-area rent comparisons place the ZIP below each supplied contextual asking-rent figure: the City of Upland context rent was $2,408, San Bernardino County context rent was $2,489, and the Riverside-San Bernardino-Ontario, CA metro context rent was $2,539. Each is context for its named geography rather than a substitute for the ZIP-level ZORI. The comparison indicates that the current ZIP asking-rent index is lower than the city, county, and metro context readings, but it does not identify which rental types, lease terms, or building characteristics account for those differences.
Redfin supplies a separate, direct rolling-three-month ZIP resale observation rather than rental transactions. Its median sold price was $717,838, down 5.6% year over year; 83 homes sold, median marketing time was 40 days, inventory was 84 homes, and months of supply stood at 3.1. Sale-to-list signals were close to parity, with an average sale-to-list ratio of 99.87% and 33.4% of sales above list price. Annualized ZIP ZORI divided by the median sold price produces a 3.95% cross-source screening ratio only, not a cap rate, net return, expected return, or property yield. The decline in the resale price measure challenges a simple favorable reading of still-positive rent growth and that screening ratio, even while near-parity sale-to-list results show that the resale evidence is not uniformly weak.
Several limits should govern interpretation. Zillow ZORI is an all-types ZIP asking-rent index, while ACS is retrospective survey evidence for occupied renter homes, HUD is an administrative standard, and Redfin reports ZIP for-sale outcomes; none is a substitute for unit-level rent or resale comparables. Concrete property-level checks include the advertised rent and included utilities, exact bedroom and bathroom count, lease length, concessions, condition, days listed, comparable recent closed sales, list-price changes, and building-specific vacancy or turnover evidence. The history and Redfin series are backward-looking measurements, not predictions. Which source best fits the precise decision question: a current asking-rent benchmark, occupied-home affordability context, bedroom standard, or direct resale liquidity?