ZIP 02144’s sharpest measured tension is between the current Zillow asking-rent signal and the survey record of occupied renter homes. The ZIP Zillow ZORI is $3,844 per month, versus an ACS median gross rent of $2,702, a 42.3% gap. The current index is 6.1% above its same-month prior-year reading. Against local median household income of $150,313, the arithmetic income needed to keep that asking-rent index at a 30% rent share is $153,760, placing the screen at 30.7% of median income. Zillow ZORI is a typical observed asking-rent index blended across rental types, so it is useful as a current market indicator but does not represent every lease, apartment size, or utility arrangement.
The five-digit label 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. The ACS 2024 five-year survey measures occupied renter homes rather than current listings, and its median gross rent includes selected utilities. Within that matched ZCTA, the $2,702 gross-rent median should therefore not be treated as a direct competitor listing comparison with Zillow’s asking-rent index. ACS estimates that 34.8% of renter households spend at least 30% of income on rent, while renters make up 63.4% of occupied homes. That burden measure describes surveyed households in aggregate; it cannot establish affordability, payment history, or conditions for a particular household or unit.
The housing-stock evidence shows 12,034 total housing units, of which 11,357 were occupied and 677 were vacant, producing a 5.6% vacancy rate. Only 72 vacant units were classified as for rent in the ACS snapshot. The stock also included 1,459 single-family units and 1,556 units in large multifamily structures, a reminder that the ZIP-level rent index spans a mix of housing forms. Vacancy is not a current availability count, and the for-rent vacancy category is not evidence that any specific unit is available, appropriately priced, or comparable to the current ZORI. It instead supplies a broad survey-based check on the scale and occupancy of the local housing inventory.
The bedroom view is deliberately modelled rather than observed. Scaling ZIP ZORI by the local HUD ladder produces modelled monthly estimates of $2,713 for a studio, $2,929 for one bedroom, $3,844 for two bedrooms, $4,805 for three bedrooms, and $5,090 for four bedrooms. These are modelled estimates, never measured bedroom rents. HUD FMR/SAFMR is an administrative bedroom-specific standard, not asking rent: the local two-bedroom HUD benchmark is $2,311, making the ZIP ZORI-based two-bedroom model 66.3% higher. The ladder helps organize size differences around the ZIP index, but it does not account for condition, utilities, lease concessions, furnishings, or the actual bedroom mix represented in current listings.
The rent-history record supports a continuing upward longer path but argues against treating one reading as frictionless. The one-year exact same-month annualized rent change was 6.1%, the three-year measure was 5.0%, and the five-year measure was 7.0%. Recent direction therefore confirms the positive multi-year path, although the latest pace remains below the five-year rate. History coverage is 100%, based on 124 monthly observations and 123 sequential monthly returns. At 4.0%, annualized monthly-return variability indicates meaningful month-to-month movement around that trend, reducing confidence in a single current snapshot. Separately, the worst peak-to-trough drawdown reached 10.4%, showing that a rising multi-year record still contained a material reversal. Transparent national discovery ranks among history-eligible ZIPs place momentum at 221, stability at 2,581, and balanced performance at 995, where lower ranks are stronger. These are backward-looking measurements, not forecasts or investment recommendations.
For wider asking-rent context, Somerville city context is $3,588.91, Middlesex County context is $3,260, and Boston-Cambridge-Newton, MA-NH metro context is $3,210. The ZIP index sits above each of those broader geography measures, but the city, county, and metro values are context rather than substitutes for ZIP evidence. Their differing renter populations, housing mixes, and source scopes prevent a clean inference that a unit in 02144 should command any specific premium. The ZIP’s lower ACS burden share than the broader county context can similarly describe aggregate households without resolving whether the current asking-rent level is workable for a given renter profile.
Redfin’s direct rolling three-month ZIP resale observation belongs strictly to the for-sale market, not rental transactions. It reports a median sold price of $1,157,738, up 0.7% year over year, with 59 homes sold, 19 median days on market, 139 active listings, 51 homes of inventory, and 2.6 months of supply. Sale-to-list signals were firm: the average sale-to-list ratio was 102.9%, and 52.7% of sales closed above list price. The annualized ZIP ZORI divided by median sold price is a 4.0% cross-source screening ratio only, not a cap rate, net return, expected return, or property yield. Resale evidence challenges a simple rent-growth narrative because sold-price appreciation was much slower than the current rent-index change, while short marketing time and above-list outcomes still indicate active resale conditions. Neither point validates rental economics for a property.
All source differences remain decision-critical. Zillow tracks a blended asking-rent index; ACS is a multi-year survey of occupied households with selected utilities; HUD supplies an administrative standard; and Redfin records ZIP resale activity. None measures the exact rent, expense structure, tenant demand, condition, or transaction economics of an individual home. Concrete property-level checks should include current same-bedroom asking comparables, actual lease and concession terms, utility responsibility, unit condition, legal bedroom count, building type, days listed, occupancy status, and recent address-level sale records. The key unresolved question is whether a particular unit’s current terms resemble the index and modelled ladder rather than merely sharing the ZIP label.