New Jersey Mansion Tax Alert: Why Your Property Classification Matters More Than Ever
6/3/2026
If you are preparing to sell, purchase, or market real estate in New Jersey, now is the time to take a close look at your property's tax classification. Recent legislative changes and a significant Tax Court decision have dramatically altered the landscape of New Jersey's Realty Transfer Fee, commonly known as the "Mansion Tax."
For many property owners and investors, a classification issue that was once overlooked could now mean the difference between paying hundreds of thousands of dollars in additional taxes or avoiding the tax altogether.
Major Changes to the New Jersey Mansion Tax
Historically, New Jersey's Mansion Tax imposed an additional 1% fee on transactions exceeding $1 million involving certain classes of real property, including most residential, farmland, and commercial properties. The tax was traditionally paid by the purchaser.
In July of 2025, the Legislature amended N.J.S.A. 46:15-7.2, whereby, responsibility for the tax has shifted to the seller, and the flat 1% fee has been replaced with the following graduated rate structure:
Over $1,000,000 up to $2,000,000: 1%
Over $2,000,000 up to $2,500,000: 2%
Over $2,500,000 up to $3,000,000: 2.5%
Over $3,000,000 up to $3,500,000: 3%
Over $3,500,000: 3.5%
These increased rates can significantly impact transaction economics and should be addressed early in contract negotiations. In larger transactions, the potential Mansion Tax liability can materially affect pricing, underwriting, and deal structure.
Property Classification Can Determine Whether the Tax Applies
Not every property is subject to the Mansion Tax. While Class 2 residential, Class 3A farmland and Class 4A commercial properties fall within the statute, certain classifications, including Class 1 vacant land, Class 4B Industrial and Class 4C Apartment properties remain exempt.
This distinction has become particularly important for mixed-use properties, such as apartment buildings with ground-floor retail space. Traditionally, many of these properties were classified as Class 4A Commercial Mixed-Use because of their retail component. As a result, owners often faced substantial Mansion Tax liability upon sale, even when the overwhelming majority of the property consisted of residential apartment units.
A Significant Tax Court Decision Creates New Opportunities
On April 27, 2026, the New Jersey Tax Court published the following decision, One Main St Edgewater, LLC v. Borough of Edgewater, establishing an important standard for classifying mixed-use properties, in turn, impacting Mansion Tax refunds.
The Court held that when a property contains multiple uses that could support different classifications, the proper analysis is the “predominant use” test. For owners of apartment buildings with limited retail space, this ruling could have enormous financial implications. The court found to determine the “predominant use” the assessor must look at both the income generated and the square footage breakdown of the property.
Consider a building with 75 apartment units and a single ground-floor retail tenant, which generates one million dollars ($1,000,000) in annual income. While the retail component may have historically influenced the property's classification, the property's primary use is clearly residential, as shown by the share of square footage and annual income attributable to the residential versus retail components. Under the Court's reasoning, many such properties may be more appropriately classified as Class 4C Apartment properties, making them exempt from the Mansion Tax. For high-value transactions, the potential tax savings can be substantial.
New Guidance from the Division of Taxation
The impact of the Court's decision was further reinforced in a May 14, 2026, memo from the Division of Taxation issuing guidance to county clerks, municipal assessors, and county tax administrators adopting the predominant use analysis. Assessors must examine both 1) the square footage of the uses, as well as; 2) the income generated from those uses. These factors are used to determine which use predominates and how the property should be classified.
Perhaps most importantly, the Division has established a procedure allowing property owners to seek correction of an improper classification up to 45 days before closing. This represents a meaningful change from prior practice. Historically, taxpayers were often required to pay the Mansion Tax at closing and then pursue a refund after the deed was recorded. The new procedure may allow eligible property owners to resolve classification issues before closing and avoid paying the tax altogether.
What Property Owners, Investors, and Developers Should Do Now
If you own, are selling, or are under contract to purchase a mixed-use property, consider now whether the current tax classification is correct. We urge you to call us as soon as possible. Our tax and real estate teams can review your property's classification, assess potential exposure, and identify available strategies before closing. A classification review conducted before closing may reveal opportunities to eliminate or reduce Mansion Tax liability altogether. With Mansion Tax rates now reaching as high as 3.5%, early tax planning can have a major impact on the success of a transaction.
For more information:
Robert J. Guanci, Esq. (201) 330-7463
Jacob B. Kenter, Esq. (201) 319-5741
Joseph G. Ragno, Esq. (201) 330-7465
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