By: KeyCrew Media

A proposal circulating at the city level would impose a new tax on residential properties valued above $5 million, raising real questions about both policy mechanics and market impact. For the buyers and owners it would affect, the details that matter most remain unresolved.

Mukul “Micky” Lalchandani, founder and principal broker at Undivided, has been following the proposal closely, both as a practitioner and as an advocate in discussions with local government officials. His assessment is measured: the political path to implementation is more complicated than the headline suggests, but the underlying questions the proposal raises are worth taking seriously, regardless of outcome.

The Valuation Problem No One Has Answered

The first and most fundamental challenge with a tax on properties valued above $5 million is establishing what a property is actually worth. The proposal, as currently discussed, would activate at the point of sale, meaning the tax triggers when a transaction is recorded. But for owners who purchased decades ago, potentially at a fraction of today’s market value, and have never sold, no verified price exists. Determining the taxable value for those properties would require a new assessment methodology that does not yet exist in structured form.

“If someone bought a penthouse 30 years ago for $300,000 and has never sold it, how does the city establish that it’s worth $5 million today?” Lalchandani asks. “The sale is what creates a verified value. Without it, you’re estimating, and estimating unique luxury properties is genuinely difficult. Even experienced brokers disagree on valuations for one-of-a-kind homes with unusual layouts or significant renovations.”

Implementing a consistent valuation standard for the luxury segment would, in effect, require a fundamental rethinking of how property taxes are assessed at every level. The practical complexity of that undertaking may be as significant an obstacle as the political one.

The Political Path Is Complicated

The proposal reflects an effort to raise municipal revenue in a city facing fiscal pressure, a goal with clear political appeal. But its path through the legislative and executive environment is far from straightforward.

New York’s governor faces reelection this cycle, and a policy perceived as targeting high-net-worth residents carries real political risk given that constituency’s fundraising influence. The Real Estate Board of New York has already begun organizing opposition. And the proposal would require city-level support that is not assured.

Lalchandani’s read on the current moment is that political signaling is driving more of the activity than genuine legislative momentum. The governing coalitions needed to move the proposal forward have not yet aligned. “I’d watch, not worry, at least for the near term,” he says.

He plans to raise the issue during an advocacy day in May for alumni of Goldman Sachs’s 10,000 Small Businesses program, framing it around the broader impact on the real estate ecosystem: brokers, contractors, property managers, and others whose livelihoods depend on transaction volume in this market.

What Buyers Should Actually Be Focused On

For buyers active in the market today, Lalchandani’s advice is not to let the proposal drive decision-making. A tax that has not passed, whose valuation methodology has not been determined, and whose political viability is uncertain, is not a reliable input to a purchase decision in 2026.

What does matter is understanding the full carrying cost picture of any property before committing. Monthly common charges, existing and anticipated assessments, and the property’s tax abatement status and expiration timeline are the variables that materially affect the economics of ownership over a multi-year hold.

Tax abatements are a frequently overlooked example. If a building’s abatement expires in four years, monthly carrying costs will rise significantly at that point, a shift that needs to be modeled before the purchase decision is made, not after. “You need to understand what ownership looks like without it before you decide whether the purchase makes sense for your situation,” Lalchandani says.

Policy Risk Is Now Part of the Analysis

Whether or not this specific proposal advances, it reflects a pattern that buyers in New York’s high-value residential market need to factor into their thinking. Cities facing fiscal pressure tend to look toward concentrated wealth, and real property is among the most visible and assessable forms of that wealth. Policy risk is now a line item in the analysis, whether buyers account for it or not.

For buyers with long hold horizons, the relevant question is not what the tax environment looks like today, but what structural pressures on the city budget might produce over a 10 or 15-year ownership period. That is a question worth asking, even if the answers are uncertain.

In the meantime, several fundamentals of the luxury market continue to define the environment, including tight inventory, sustained cash demand, a shift in buyer preference toward downtown neighborhoods, and the ongoing premium placed on privacy and distinctive properties. A closer look at how those dynamics play out across specific NYC neighborhoods provides useful context for buyers weighing long-term positioning. Policy proposals worth monitoring exist within that context, not separate from it.

Mukul “Micky” Lalchandani is the founder and principal broker of Undivided, a boutique NYC residential real estate advisory firm specializing in luxury condos and new developments above the $5 million price point.

Disclaimer: This article is based on information provided by the expert source cited above. It is intended for general informational purposes only and does not constitute legal, financial, or real estate advice. Readers should conduct their own research and consult qualified professionals before making any real estate or financial decisions.