Old Tappan, NJ vs South River, NJ

The cost of living difference between Old Tappan, NJ and South River, NJ is dramatic. South River is 78.1% cheaper than Old Tappan, a gap that translates to thousands of dollars per year in household expenses. Old Tappan has a cost index of 212 while South River sits at 119, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.

On the housing front, median rent in Old Tappan is $3,241/month compared to $1,599/month in South River — a 103% difference. Home values follow the same pattern: South River is more affordable at $382,500 median vs $910,600.

Median household income in Old Tappan is $199,250 compared to $101,853 in South River (+95.6%). While Old Tappan is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Old Tappan spend roughly 19.5% of their income on rent, more than the 18.8% in South River.