Union County, New Jersey

Selling your home in Mountainside.

What homes in Mountainside actually sold for, whether a builder might pay more, and a free price estimate from an agent who works in Mountainside.

Mountainside Home Prices

What homes in Mountainside sold for.

Every recorded single-family and condo sale in Mountainside, July 2025 through June 2026, from New Jersey deed records.

55homes soldlast 12 months
$980Kmedian price+0.5% vs the year before
$427per sq ftolder homes, from the tax record
14bought by buildersolder homes and lots since 2019
Home sizeSoldMedian price
Under 1,500 sq ft6$712,500
1,500 to 2,500 sq ft22$882,500
2,500 to 3,500 sq ft18$1,221,626
3,500 sq ft and up9$1,325,250

Source: NJ Division of Taxation deed records (SR1A), usable sales only. Home size is from the tax record and can differ from a listing. Full Mountainside market report.

Your Options

Two ways to sell, and you can compare both.

List it on the marketFull marketing through Corcoran Sawyer Smith and the MLS, so every buyer and agent sees it. Usually the best price for a home in good shape. Sell it to a builderBuilders bought 14 older homes and lots in Mountainside since 2019, at a median of $519K, and the new homes on those lots sold for a median of $1.4M. If your house is older, a builder may pay as much as, or more than, a buyer who would have to renovate. Check your address free. Get both numbersWe price your home both ways, listed and as-is to a builder, side by side, so you can choose with real numbers. Nothing is shared with a builder unless you say so.

Free Estimate

What is your Mountainside home worth?

Tell us the address. We look at the recent sales around you, your home and what builders are paying, then send you a real number.

An agent who works in Mountainside will send your estimate, usually within one business day. No obligation.

Tonye Ikiere

Written and reviewed by

Tonye Ikiere

REALTOR-Associate, Builders Resource Center at Corcoran Sawyer Smith. Works with sellers in Mountainside. Numbers updated September 2026.

About Tonye ยท (732) 913-9250

Keep Exploring

More on Mountainside.

Moving to MountainsideWhat your budget buys, how old the homes are, and what is for sale now.Mountainside zoning for buildersLot sizes, setbacks and how big a new house can be, zone by zone.
Mountainside market reportEvery home sold, median prices and the agent who knows the town.Land and teardowns in MountainsideWhat builders paid for older homes, and lots for sale now.What can you build on your lot?Enter an address: zoning, lot size and roughly how big a new home could be.