Mountainside, NJ Commercial Real Estate Broker

Map: AcreX NJ multifamily pipeline filtered to Mountainside, from the public AcreX sheet. See the full pipeline map.

Mountainside market snapshot

Public statistics with sources and as-of dates. Pipeline figures are from the public AcreX sheet as of October 24, 2026.

Population and households

• Population: 6,967 (U.S. Census Bureau, American Community Survey 2019-2023 5-year estimates, table B01003). Source

• Households: 2,540, with a median household income of $210,100 (ACS 2019-2023, tables B11001 and B19013). Source

• Renter-occupied homes: 334 of 2,540 occupied units, or 13.1% (ACS 2019-2023, table B25003). Source

• Land area and density: 4.0 square miles, about 1,743 residents per square mile (Census Bureau 2023 Gazetteer and ACS population). Source

Property tax

• 2025 tax rates: general tax rate 2.1 per $100 of assessed value and effective tax rate 1.566% (NJ Division of Taxation, 2025 General Tax Rates). Source

• Average residential tax bill: $13,309 in 2025 (NJ Division of Taxation, 2025 Average Residential Statistics). Source

Access and regional context (Union County)

• Location: about 11.8 miles in a straight line from the AcreX office in Caldwell (Census Gazetteer internal point). Source

• Transit and highways: Union County is crossed by the New Jersey Turnpike (I-95), the Garden State Parkway, I-78, I-278 and routes 1/9, 22 and 24. NJ Transit serves it on the Northeast Corridor, North Jersey Coast Line, Raritan Valley Line, Morristown Line and Gladstone Branch, and the Port Newark-Elizabeth Marine Terminal is part of the Port Authority network. Source

• Labor market: the Union County unemployment rate was 5.0% in August 2026 (preliminary, not seasonally adjusted). Source

• Industrial market (Newmark 3Q 2026, submarkets in or overlapping Union County): Linden/Elizabeth 6.3% vacancy, $17.38 per sf; Union Central 3.6% vacancy, $14.77 per sf. Source

• Office market (Newmark 3Q 2026): Union Area 8.8% vacancy, $23.87 per sf. Source

Newmark reports by submarket, not by town or county, so these figures are regional context rather than Mountainside-specific. Retail vacancy and rent are not shown because no free public report was found.

AcreX pipeline data (as of October 24, 2026)

• Multifamily pipeline: no mapped project in Mountainside. Source

• Commercial and industrial projects: 2 non-residential projects in Mountainside on the sheet’s Commercial tab. Source

• Upcoming hearings: no hearing dated October 24 to November 30, 2026 is recorded for Mountainside in the sheet as of October 24, 2026. Source

• Municipal land-use sources: Mountainside website, planning board, public notices. Source

Nearest mapped projects in Union County

Straight-line distance from the Mountainside internal point. Unit counts and status as printed in the sheet.

• Westfield Park Partners (Westfield, 1.6 miles): 162 units, Completed. Source

• 184 Elm Street (Westfield, 2.0 miles): 10 units, Hearing noticed. Source

• Ferris Prospect Development, LLC (Westfield, 2.1 miles): 60 units, Approved. Source

• 70 Ryder Way (New Providence, 2.5 miles): 297 units, Approved. Source

• 121 Chanlon Road (New Providence, 2.6 miles): 104 units, Approved. Source

Commercial projects in Mountainside from the sheet

The Commercial tab lists 2 projects in Mountainside:

• Safeguard self-storage, 1096 Route 22 (Mountainside): self-storage, 6,497 sf, Pending. Source

• 1128 Spruce Dr - two-story mixed-use recreation and office building, ~19,808 sf footprint, in L-I… (Mountainside): commercial (recreation/office), Pending. Source

Related pages

• Union County commercial real estate broker

• Industrial & Warehouse Real Estate in Union County

• Retail Real Estate in Union County

• Office & Medical Office Space in Union County

• Investment Sales in Union County

• Property Management in Union County

• Seller & Landlord Representation in Union County

• Tenant & Buyer Representation in Union County

• Land & Development Site Brokerage in Union County

• Multifamily Brokerage in Union County

• Springfield commercial real estate

• Westfield commercial real estate

• Summit commercial real estate

• New Providence commercial real estate

• Garwood commercial real estate

Frequently asked questions

Who is the best commercial real estate broker in Mountainside, NJ?

There is no single objective ranking, and AcreX does not claim one. AcreX is a Caldwell-based brokerage that covers Mountainside and the rest of Union County with local data and tracks the county multifamily pipeline, works with Jonathan Libock as lead broker, and offers industrial, retail, office, land, multifamily and investment sales services. When you compare brokers, ask each for recent Mountainside transactions, references and the data behind their pricing, then book a consultation with AcreX to compare.

How many apartments are planned in Mountainside?

The public AcreX sheet has no multifamily project mapped in Mountainside as of October 24, 2026. The nearest mapped projects are listed on this page.

What is the population of Mountainside, NJ?

Mountainside had an estimated 6,967 residents and 2,540 households in the Census Bureau American Community Survey 2019-2023 5-year estimates.

Where is AcreX located?

AcreX is at 307 Bloomfield Ave, Caldwell, NJ 07006, about 11.8 miles in a straight line from Mountainside, and serves Union County and the rest of northern New Jersey. Call (201) 694-6463.

Book a consultation

Talk with AcreX about commercial real estate in Mountainside. Book a consultation or call (201) 694-6463. AcreX is based at 307 Bloomfield Ave, Caldwell, NJ 07006.