While home prices are up across San Antonio, a new study shows that one local ZIP code has surpassed others in its rapid jump in cost. Home values in San Antonio’s 78203 ZIP code, which includes the east-of-downtown neighborhood near the Alamodome, have shot up 235% between 2016 and 2023, according to a study from Texas Real Estate Source. That’s the second-highest increase in the state over that period.