When three siblings inherit a Brooklyn brownstone their parents purchased in 1978 for $55,000, the first question usually is not about the law. It is about the house. Sibling A wants to live in it. Sibling B wants to rent it out. Sibling C wants to sell it immediately and walk away with their share of the cash. Before anyone can make a move, the executor must establish the property’s fair market value as of the exact date the parent died. This single number dictates capital gains taxes, estate tax liabilities, and exactly how much Sibling A will have to pay the others to keep the keys.
Determining the fair market value of an inherited asset is not a casual administrative task—it is a foundational requirement driving the entire estate administration process. Overlooking this precision routinely leads to tax penalties, delayed Surrogate’s Court proceedings, and permanent family rifts.
The “Step-Up in Basis” and Capital Gains Exposure
I frequently meet with families who want to transfer a home’s deed to their children while they are still alive, assuming it simplifies matters. I strongly advise against this in most cases. When you make a lifetime gift of real estate, you transfer your original tax basis. If the parents gift that $55,000 brownstone today, the children inherit a $55,000 basis. When they eventually sell the property for $3.2 million, they owe capital gains taxes on millions of dollars in profit.
By passing the property through an estate instead, federal tax law provides a vital mechanism: the step-up in basis. Beneficiaries do not inherit the original purchase price. Under the Internal Revenue Code, the property’s tax basis is “stepped up” to its fair market value on the decedent’s date of death. If the property is worth $3.2 million on the day the surviving parent passes away, the new tax basis becomes $3.2 million. If the executor sells the property shortly thereafter for that exact amount, the estate owes zero capital gains tax.
Without a precise, legally defensible valuation, the estate risks overpaying capital gains taxes or triggering a prolonged audit from taxing authorities who question the baseline numbers.
Why Internet Estimates Fail in Surrogate’s Court
A common mistake executors make is relying on consumer real estate websites or requesting a quick broker price opinion to establish the property’s value. Surrogate’s Court and the New York State Department of Taxation and Finance require far more rigor.
Fair market value has a strict legal definition—it is the price at which property would change hands between a willing buyer and a willing seller, neither being under any compulsion to buy or sell, and both having reasonable knowledge of the relevant facts. To prove this number, an executor must commission a formal date-of-death appraisal by a licensed real estate appraiser.
The appraiser will look back at the market conditions exactly as they were when the decedent passed, comparing the property to similar homes sold in the immediate vicinity during that specific window of time. If the home has structural issues, unpermitted additions, or requires extensive modernization, the appraiser factors those defects into the final figure. A printout from a real estate portal will not survive scrutiny if the estate’s tax returns are challenged or if a beneficiary disputes the accounting.
While the date of death is the standard baseline, federal law does offer an alternative. If the broader real estate market declines shortly after the decedent’s passing, the executor may elect an alternate valuation date—exactly six months after the date of death. This is only permitted if using the alternate date decreases both the gross estate’s value and the estate tax liability. It is a highly specific calculation.
The Unique Valuation Problem of Co-ops
Valuing residential property in this state often involves a unique asset class: the cooperative apartment. When you inherit a co-op, you are not actually inheriting real estate. You are inheriting shares in a cooperative corporation and a proprietary lease. Establishing the fair market value of these shares requires a nuanced approach.
An appraiser must consider the specific financial health of the building, the underlying mortgage on the property, and the strictness of the co-op board. If a board is notoriously stringent and rejects a high percentage of applicants, the pool of willing buyers naturally shrinks. This reality can legitimately depress the fair market value of the shares compared to an identical condominium unit located just down the street.
Equalizing Distributions Among Heirs
Valuation is equally critical when managing the interpersonal dynamics of an estate. Returning to our three siblings—if one wishes to retain the real estate while the others want cash, the executor must execute a buyout.
Under New York’s Estates, Powers and Trusts Law (EPTL § 11-1.1), fiduciaries are granted broad authority to manage, appraise, and sell estate assets. However, this authority is inextricably tied to a strict fiduciary duty. The executor must treat all beneficiaries fairly and impartially. If the executor allows Sibling A to buy out the others based on an artificially low valuation, Sibling B and Sibling C have absolute grounds to challenge the executor in Surrogate’s Court for breach of fiduciary duty.
A formal appraisal provides a neutral, objective baseline. It removes emotion from the equation. If the home is appraised at $3 million, Sibling A must fund $2 million to buy out the other two shares. There is no room for debate about what the property might be worth or what a neighbor’s house sold for three years ago.
The New York Estate Tax Cliff
High-net-worth families must also consider the state estate tax threshold. In 2024, the New York estate tax exemption is $6.94 million. Because of how the state’s tax code is written, exceeding this exemption by even slightly more than five percent eliminates the exemption entirely—a punitive phenomenon known as the tax cliff.
If an estate is hovering near this threshold, the exact fair market value of the primary residence, vacation homes, and commercial properties becomes the deciding factor in whether the estate owes nothing to the state, or whether it owes hundreds of thousands of dollars. In these borderline cases, the appraisal must be meticulously detailed, documenting every physical defect, zoning restriction, or market limitation that legitimately restrains the property’s value.
We view estate planning through a single lens. Stewardship. Leaving real estate to the next generation should be a deliberate transfer of wealth, not an accidental transfer of legal burdens. If you are preparing to pass down property, or if you are currently administering an estate holding significant real estate, we should examine the tax implications before the window for strategic decisions closes. Schedule a real estate legacy review with our office to examine your current deed structures and tax exposure.
