Mountainside, NJ housing market
The typical Mountainside home is worth about $1,065,000, up 3.8% in a year, 83% above the New Jersey typical home. Homes typically sell in 13 days, a little above asking.
Home values, sales, trends and how Mountainside compares with the towns next door — updated as new data is published.
Mountainside at a glance
A strong seller's market
Homes are selling faster than new ones are listed: less than two months of supply. Well-priced homes can draw several offers.
Typical home value, 2016–2026
Show as a table
| January | Mountainside | New Jersey |
|---|---|---|
| 2017 | $688,000 | $317,000 |
| 2018 | $722,000 | $330,000 |
| 2019 | $722,000 | $343,000 |
| 2020 | $704,000 | $358,000 |
| 2021 | $751,000 | $394,000 |
| 2022 | $804,000 | $441,000 |
| 2023 | $865,000 | $471,000 |
| 2024 | $924,000 | $511,000 |
| 2025 | $1,011,000 | $551,000 |
| 2026 | $1,040,000 | $568,000 |
| August 2026 | $1,065,000 | $580,000 |
Mountainside and its neighbors
| Town | Typical value | 1-yr change | Days on market | Median income |
|---|---|---|---|---|
| Mountainside | $1.06M | +3.8% | 13 | $211,538 |
| Berkeley Heights | $964K | +7.6% | — | $204,658 |
| Westfield | $1.32M | +9.7% | 14 | $232,629 |
| Summit | $1.41M | +13.1% | 14 | $190,304 |
5 years of income
The typical Mountainside home costs about 5 years of the town's median household income, less than across New Jersey (5.6 years).
How Mountainside ranks on affordability →
Home value ÷ ACS median household income.
Owners, rent & taxes
U.S. Census Bureau, ACS 2020-2024.
Home values: Zillow Home Value Index (ZHVI), Zillow Research, August 2026. Sales, days on market and supply: Redfin Data Center, May 2026. Income, ownership, taxes and rent: U.S. Census Bureau, American Community Survey. Listings link to their publishers.