The central tension in 29403 is a high, still-rising asking-rent benchmark alongside separate signs of softer resale pricing. At the June 2026 Zillow endpoint, ZIP ZORI is $2,669 per month. Zillow ZORI is a typical observed asking-rent index blended across rental types, so it is neither a lease quote for a specific home nor an average of every occupied rental. It provides the current rental signal used throughout this report. The contrasting resale evidence is not a second rent source: it belongs to the for-sale market and is addressed on its own terms below. Reading the two streams together identifies a tension, but it does not establish that one caused the other or that either describes a particular property.
Scope differences explain why the current asking index and survey rent should not be substituted for each other. The five-digit label is both Zillow’s ZIP market identifier and a matched Census ZCTA label. A ZCTA is a statistical area; it is not identical to a USPS delivery ZIP. In the matched ACS 2024 five-year survey, median gross rent is $1,798 for occupied renter homes and includes selected utilities. The Zillow figure is 48.4% higher, but that is a comparison across different universes: current blended asking rents versus a survey median for occupied homes. It is not proof of a rent change for an individual renter, building, or lease.
Backward-looking Zillow history supports a growth record, although the latest pace is cooler than its longer path. Exact same-month ZORI changes were 4.2% over one year, 4.6% annualized over three years, and 7.8% annualized over five years. Thus, the positive recent direction confirms the broader upward direction but breaks from the stronger five-year pace. The series shows 2.9% annualized monthly-return variability, which warrants restraint in treating a single current reading as definitive. Separately, its 2.1% maximum drawdown marks the largest historical peak-to-trough retreat, not a forecast. Coverage is 100%. Transparent national discovery ranks are 502 for momentum, 1,426 for stability, and 519 for the balanced measure; lower rank is higher. These are descriptive history measures, not investment recommendations.
Bedroom detail is a modelled allocation of the ZIP index, not a set of measured bedroom rents. The FY 2026 local HUD monthly ladder starts at $1,910 for a studio and sets a separate administrative standard by bedroom size. Scaling the ZIP ZORI through that ladder produces modelled monthly estimates of $2,328 for a studio, $2,437 for one bedroom, $2,669 for two bedrooms, $3,315 for three bedrooms, and $3,827 for four bedrooms. The packet identifies the HUD source as a ZIP SAFMR or county-derived ladder. HUD FMR/SAFMR is an administrative bedroom-specific standard, not asking rent. These estimates are useful only as a consistent size screen and are never measured rents for available units.
The arithmetic affordability screen is more strained than the current rent level alone suggests. At a 30% gross-income screen, a $2,669 monthly ZORI translates to $106,760 in required annual income, compared with ACS ZCTA median household income of $66,944; the latter has a reported $8,620 margin of error. Annualized asking rent is 47.8% of that median income. This 30% calculation is arithmetic, not advice and not an applicant-qualification rule. The ACS survey also estimates that 57.4% of renter households carry rent burdens at or above that threshold. It describes a surveyed resident cohort with survey uncertainty and cannot prove the burden, eligibility, or payment outcome for any particular unit or household.
Survey housing composition supplies a further constraint on broad readings of the rent index. The matched ZCTA contains 13,460 housing units, including 5,202 single-family units and 3,137 units in large multifamily structures; these named categories do not exhaust all structure types. Renters occupy 67.1% of occupied homes, making renter conditions especially relevant to the local survey profile. The overall vacancy rate is 19.3%, and 1,074 vacant units are classified as for rent. Vacancy is not a count of suitable, comparable, or immediately obtainable homes: it does not reveal condition, asking terms, bedroom count, or utility treatment. Nor can it prove availability at a particular property.
Broader benchmarks reinforce that this is a ZIP-specific rent signal rather than a stand-in for its surrounding geographies. In City of Charleston context, the reported rent is $2,245; in Charleston County context, it is $2,156; and in Charleston-North Charleston, SC metro context, it is $2,066. Each is a wider-area context value, not a rental comparable or a substitute for ZIP ZORI. The ZIP’s current asking-rent index is higher than all three, while the ACS and HUD measures above retain their distinct scopes. These gaps are descriptive comparisons only; they do not identify a neighborhood effect, explain the difference, or determine the terms of any listing.
Redfin’s direct rolling-three-month ZIP resale observation supplies the counterpoint. Median sold price is $889,799, down 2.8% year over year, with 116 homes sold and a median 75 days on market. Inventory is 142 homes, up 6.7%, and months of supply is 3.7. Sellers received an average 96.6% of list price, while 11.5% of sales closed above list. Those are for-sale signals: resale transactions, pricing, marketing time, inventory, and sale-to-list outcomes, not rental transactions or rental comps. Lower sale pricing and below-list average execution challenge a one-directional interpretation of continued rent growth. The 3.60% annualized-ZORI-to-median-sold-price figure is only a cross-source screening ratio, not a cap rate, net return, expected return, or property yield. Property-level interpretation requires the actual bedroom count, current asking terms, utility inclusion, unit condition, and directly comparable active or recent sale records. Does a specific property’s documentation align with these separate measures?