Acceleration, rather than a flat rent reading, is the central historical signal. Over exact same-month comparisons, ZIP ZORI increased 14.56% in one year, versus annualized 7.05% over three years and 6.17% over five years. The latest path therefore confirms the longer upward direction and is moving faster than it; all are backward-looking measurements, not forecasts or investment recommendations. The supplied ZORI series has complete coverage. Its 3.23% annualized monthly-return variability shows relatively limited dispersion in the series' month-to-month changes, lending measured confidence to the current index as a recent snapshot. A prior peak-to-trough maximum drawdown of 9.41% nevertheless shows that current levels can sit within a meaningful cycle. Transparent national discovery ranks among history-eligible ZIPs were 32 for momentum, 1,955 for stability, and 382 for balanced history; lower rank is higher, and none is predictive.
At the stated endpoint, Zillow's ZIP-level ZORI for 94122 is $3,747 per month. It is a typical observed asking-rent index blended across rental types, rather than median occupied-home rent or a bedroom quote. Wider-area context only points in opposite directions: San Francisco city context ZORI and San Francisco County context ZORI are both $4,401, while San Francisco-Oakland-Berkeley metro context ZORI is $3,301. ZIP asking rents therefore sit below the named city and county context but above the named metro context; neither comparison replaces ZIP evidence. The five-digit 94122 label is both Zillow's ZIP market identifier and a Census ZCTA match. A ZCTA is a statistical area, not identical to a USPS delivery ZIP, which matters when linking the rent index to Census tabulations.
The gap with Census data is material but not inherently conflicting. In the matched Census ZCTA, the ACS 2024 five-year survey reports median gross rent of $2,816; it describes occupied renter homes and includes selected utilities. Current ZORI is 33.1% above that ACS value, whose renter population, utility treatment, and survey design differ from Zillow's asking-rent index. ACS is therefore a resident-cost reference, not an asking-rent comp. HUD's local FMR/SAFMR ladder is a separate bedroom-specific administrative standard rather than asking rent. It should not be treated as a measured listing price. These different evidence universes answer different questions and should not be merged into a single rent estimate.
The bedroom view is a modelling device anchored to the ZIP index, not a set of observed bedroom rents. Scaling ZORI by the local HUD ladder produces modelled monthly estimates of $2,584 for a studio, $3,095 for one bedroom, $3,747 for two bedrooms, $4,787 for three bedrooms, and $4,961 for four bedrooms. They are modelled estimates, never measured bedroom rents. The equal ZORI and two-bedroom estimate is the scaling base, not evidence that every two-bedroom listing asks that amount. Relative to the local HUD two-bedroom administrative standard of $3,604, the base index is 3.97% higher. Actual unit size, condition, utilities, and listing terms remain separate facts to verify.
Affordability arithmetic creates the sharpest tension in this packet. Annualizing current ZORI produces $44,964, and a 30% screen produces required household income of $149,880. The matched ZCTA's median household income is $146,250, yielding a 30.74% asking-rent-to-income screen. In the same ACS renter universe, 4,510 of 11,569 renter households had gross-rent burdens of at least 30%, or 38.98%. This required-income screen is arithmetic, not advice or an applicant qualification rule. It does not describe a particular household's income, utility bill, lease terms, or spending choices, and the burden statistic does not prove that any specific unit is affordable or unaffordable.
The ACS/ZCTA housing profile contains 24,208 housing units, with a 7.66% overall vacancy rate and a 51.75% renter share among occupied units. Its counted stock includes 12,261 single-family units and 1,275 large multifamily units, so the composition is not solely apartment stock. Vacancy is a ZCTA-level aggregate, and the vacant-for-rent category cannot establish that a particular unit is available, comparable, or priced at ZORI. Likewise, renter share describes occupied households in the statistical area, not the tenure or rental terms of a specific building. The lower ZIP asking index relative to city and county context should not be attributed to vacancy or structure mix from these aggregate counts alone.
Redfin's direct rolling-three-month ZIP resale observation is a for-sale, not rental-transaction, record. It places the median sold price at $1,887,074, up 17.94% year over year; 93 homes sold with a median 14 days on market. The observation lists 100 active listings, a separately reported inventory count of 13 homes, and 0.4 months of supply. Average sale-to-list was 131.19%, while 86.75% of sales were above list. These are resale liquidity and pricing signals, not rental comps or property economics. Annualized ZIP ZORI divided by the median sold price is 2.38%, solely a cross-source screening ratio, not a cap rate, net return, expected return, or property yield. The resale price advance directionally confirms current rent acceleration, but the affordability screen and cross-source ratio challenge any assumption that transaction strength answers a household or property-level rent question.
The packet cannot translate aggregate indicators into a unit-level conclusion. ZORI is an index, ACS is a five-year survey of occupied homes, HUD is an administrative standard, and Redfin tracks resale activity; their dates, samples, and definitions do not produce interchangeable comps. Concrete property-level checks remain the documented asking price and concessions, bedroom count, floor area, condition, utility responsibility, lease duration, availability date, address-to-geography match, and recent property-specific sale or list records. Those checks can establish whether an individual offering resembles the aggregate measures without claiming that vacancy, burden, resale competition, or a modelled bedroom estimate proves anything about that unit. Does the documented unit evidence actually align with the specific measure being used?
","findings":[{"body":"Same-month ZIP ZORI growth was 14.56% over one year, compared with annualized gains of 7.05% over three years and 6.17% over five years. The current acceleration confirms, rather than reverses, the longer upward direction. Complete supplied coverage helps interpret the history, yet the 9.41% drawdown means the record remains a backward-looking cycle measure, not a forecast.","title":"Rent acceleration exceeds its longer-run pace"},{"body":"Zillow ZORI is a typical ZIP asking-rent index, while ACS median gross rent is a five-year survey measure for occupied renter homes that includes selected utilities. HUD FMR/SAFMR is another universe: an administrative, bedroom-specific standard. Therefore, the $3,747 ZORI, $2,816 ACS median, and HUD-scaled bedroom figures are complementary references, not interchangeable measures of the same rental transaction.","title":"Asking rent, resident cost, and HUD standards differ"},{"body":"Redfin's direct ZIP resale observation recorded a $1,887,074 median sold price, 93 homes sold, short marketing time, limited supply, and frequent above-list sales. Those signals describe for-sale liquidity and pricing only. The 2.38% annualized ZORI-to-sale-price figure is a cross-source screening ratio, not a cap rate, net return, expected return, or property yield.","title":"Resale activity is strong but remains a separate market"},{"body":"The income screen slightly exceeds matched ZCTA median household income, while 38.98% of surveyed renter households reported gross-rent burdens at or above thirty percent. Housing stock and vacancy counts add geographic context, but neither can establish availability, utility costs, lease terms, household eligibility, or affordability for a particular property.","title":"Aggregate affordability and vacancy do not describe one unit"}],"risks":["The ZORI-to-ACS gap should not be read as a pricing error: one is an asking-rent index and the other is a survey median for occupied renter homes that includes selected utilities.","The required-income calculation uses aggregate median income and an arithmetic 30% threshold. It cannot identify an applicant income, household spending pattern, lease eligibility, or affordability of any specific unit.","Complete historical coverage does not remove timing risk. The history contains a meaningful prior drawdown, and its acceleration describes observed past changes rather than future asking rents or outcomes.","Redfin's rolling resale observation measures sold homes and listing-market signals, not rental transactions. Its price-based screening ratio omits expenses, financing, taxes, physical condition, and unit-level lease terms."],"qa":[{"a":"At the stated endpoint, Zillow's $3,747 ZORI is a ZIP-level typical observed asking-rent index blended across rental types. It is not a median paid rent, a utility-inclusive gross-rent measure, or an observed bedroom-specific listing average. The ZIP identifier matches a Census ZCTA label, but the ZCTA is statistical and differs from USPS delivery geography.","q":"What does the current ZIP rent figure measure?"},{"a":"Each bedroom value starts with ZIP ZORI and applies the relative spacing in the local HUD FMR/SAFMR ladder. The resulting studio through four-bedroom figures are modelled monthly estimates, not measured bedroom rents. The matching two-bedroom amount is simply the selected model base, so it does not establish any actual listing's asking price.","q":"How were the bedroom figures created?"},{"a":"The required-income figure annualizes ZIP ZORI and divides it by thirty percent. It is a transparent arithmetic screen only. It does not account for a household's actual income, utilities, other expenses, household size, lease terms, subsidies, savings, or an owner's application standards, and it is not an affordability recommendation.","q":"What does the 30% required-income screen mean?"},{"a":"No. Redfin reports direct ZIP for-sale and resale outcomes, including sold price, sales volume, marketing time, inventory, supply, and sale-to-list behavior. Those metrics can be compared directionally with rental evidence, but they are not rental transactions or property-level rental economics. The ZORI-to-sale-price calculation is only a cross-source screening ratio.","q":"Does the Redfin resale block validate rental pricing?"}],"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 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ars":5,"startPeriod":"2021-06-01","endPeriod":"2026-06-01","startRent":2777.227372,"endRent":3746.814327,"change":0.3491204806546895,"cagr":0.061720363417912205}},"maxDrawdown":-0.09414317935189409,"annualizedVolatility":0.03233148871680124,"consecutiveReturnCount":102}}