To live in one of San Antonio's swankiest ZIP codes requires a minimum annual salary of $120,407, according to Business Journal research.
The 78257 ZIP code, which includes the Dominion and other high-end residential developments on the Far Northwest Side, has an average median home value of $596,700. That makes it the ZIP code with the highest median home value in Bexar County.
Compare those values to the county's lowest ZIP code for median home values, the 78207 area, which includes the west…
