What to know before you move: cost, market timing, who it fits.
If you're considering a move to Mountainside, NJ, the most important variables are the local housing market, the cost structure (taxes, insurance, utilities), and how well the city fits your day-to-day life. This page summarizes the housing market read; pair it with the cost of living page for the full picture.
Mountainside is a city in Union County, New Jersey, with an estimated population of 7,228. It anchors the New York-Newark-Jersey City metro area. The population grew 0.7% annually from 2020 to 2024, a moderate gain. The median home value in Mountainside is $1,052,281 as of 2026-04, up 3.7% over the last 12 months. Over the last five years, home values have averaged +6.5% annual growth, with prices at or near the 5-year peak. The composite momentum score is 71 of 100 (Rising). The market is healthy with prices supported by underlying demand.
Quiet strength: prices near or at all-time highs (+0.0% from 5-year peak). Solid market for owner-occupiers; investors should underwrite conservatively given the elevated entry point.
Reasons people move here
- Healthy 5-year run: +6.5% annualized over 5 years, outpacing US inflation.
- Quiet strength: +3.7% over the trailing year — not a melt-up, but the market is bid.
- Held the highs: currently +0.0% from the 5-year peak — this market refused to give back gains.
Things to know first
- Premium territory: $1,052,281 median home is a high bar to clear — affordability constrains the buyer pool.
- Local nuance: city-level data smooths over neighborhood differences. School zones, HOA rules, and street-level character matter — visit before deciding.
More about Mountainside
Sources: Zillow ZHVI (home values), Zillow ZORI (rents), US Census ACS + place population. Updated when source agencies publish revisions.