Cost of Living in Mountainside, NJ
Cost of Living in Mountainside, NJ has an overall index of 214, 114% above the U.S. baseline of 100. The typical home value is $1,033,256; typical monthly rent is $3,517; and median household income is $210,100.
Cost index: committed city housing/rent inputs and BEA 2024 metro-area price parities. Home value: Zillow ZHVI market signal as of 2026-02. Rent: Zillow ZORI market signal as of 2026-02. A place-level signal, not a personal affordability decision or financial recommendation.
Housing costs sit well above the national baseline. This describes the local market, not your household.
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Frequently asked questions about Mountainside
Living in Mountainside
Is Mountainside, NJ an expensive place to live?+
Yes — Mountainside is about 114% more expensive than the national average, with an overall Cost Index of 214. Housing is the biggest factor: the typical home here is valued around $1,033,256, and monthly rents average roughly $3,517. Day-to-day costs like groceries and utilities tend to run higher than average as well.
How does Mountainside fit a household housing budget?+
Start with housing. Typical monthly rent is $3,517, while local median household income is $210,100. That implies a rent-burden proxy of about 20% before utilities and other costs. Use that as a planning signal for whether the place looks manageable under your own household assumptions.
How much are taxes in Mountainside, NJ?+
New Jersey uses a progressive model; 10.75% is top marginal-rate context. Applying the 2.47% state-level effective owner-occupied proxy to a home worth $1,033,256 gives a planning estimate near $25,521 per year; it is not a city, county, parcel, or individual tax bill. State plus average local sales-tax context is around 6.6%.
How much does it cost to rent in Mountainside, NJ?+
The typical monthly rent in Mountainside is around $3,517. That's about 161% higher than the $1,348 national median. For comparison, the median home value here is $1,033,256, so buyers should also factor in mortgage payments, property taxes, and insurance.
How much does a house cost in Mountainside, NJ?+
The typical home value in Mountainside is $1,033,256. With 20% down and the committed 6.11% national 30-year fixed benchmark as of 2026-03-12, principal and interest are roughly $5,015/month before property tax and insurance. This is a planning estimate, not a local lender quote. About 87% of residents here own their homes.
Are groceries and utilities expensive in Mountainside?+
Grocery prices in Mountainside are noticeably pricier compared to the rest of the US (index: 110, where 100 is the national average). Utility bills (electricity, gas, water) are on the high side (index: 127). Both add meaningful weight to your monthly budget here.
What is Mountainside, NJ like to live in?+
Mountainside is a small town with a population of about 6,967. The median age of residents is 48.7, skewing somewhat older — common in established suburban communities. The local poverty rate is 2.85%, well below the national average of 12.4%.