ZIP Code 94027 — Atherton, California

The median home in 94027 is valued at more than $2,000,000 (the Census reporting ceiling) against a median household income of more than $250,000 (the Census reporting ceiling), a price-to-income ratio of at least 8.0. That is above the 6.7 median across the 1,558 California ZIP codes with published housing data, and well past the 3.0 ratio that marks an attainable market nationally, so buying here on a local median income requires substantial savings or a second income. Within San Mateo County, 94027 ranks 6 of 28 ZIPs on affordability (1 = lowest ratio); the county median ratio is 9.0. Renting takes 16.8% of median household income (median rent $3,501 a month), under the 30% cost-burden threshold.

94027 ranks 1 of 1,558 statewide on median household income and 1 of 1,558 on median home value; its income is far above the $161,447 San Mateo County median. 86% of households own their home, above the 64% statewide ZIP median, making this a majority-owner ZIP. 86% of adults hold a bachelor's degree or higher, far above the 31% median, and the poverty rate is 3.9%, far below the 10.8% statewide ZIP median and among the lowest in the state. Unemployment stands at 2.2%.

With 1,428 residents per square mile across 5 square miles of land, 94027 is denser than the statewide ZIP median of 1,120 (rank 749 of 1,558). This is a low-density pattern of large lots, small towns or scattered subdivisions.