According to Realtor.com data covering June 2026, 10 New Jersey ZIP codes ranked among the 99 hottest housing markets in the country, a sign of continued strong buyer demand and tight housing supply across the state. The ranking reflects the kind of steady suburban demand that has defined the town's housing market in recent years. Sewell, in Gloucester County, ranked No. Realtor.com calculates its rankings using a hotness score built from two measures: demand, tracked through unique property views, and supply, tracked through how many days a listing stays active before selling. The two figures are combined and compared against markets nationwide to produce the rankings.