To be sure, Philadelphia's market has more to it than just a citywide average — and not all neighborhoods have seen prices reach a plateau. According to an Inquirer and Daily News analysis of all Philadelphia zip codes, the median price of homes that sold in the second quarter still increased in 28 of 44 Philadelphia zip codes, compared with the year before. (Gillen's data exclude condo sales, and the Inquirer and Daily News excludes zip codes with fewer than 10 sales.) Among the markets that made the largest gains in price: The city's 19118 zip code, encompassing Chestnut Hill, which jumped 68 percent to $774,250. The 19106 zip code, representing Old City and Society Hill, increased second-most, at 49 percent, rising to a median home price of $1.29 million.