The 45-Day Identification Period Explained

The clock on a 1031 exchange starts the moment your relinquished property closes, not when you first list it or when you sign a contract with a buyer. From that closing date, you have exactly forty-five calendar days to identify potential replacement property in writing, delivered to your qualified intermediary. There is no extension for weekends, holidays, or a slow co-op board in Queens. For a seller moving out of a walk-up in Astoria or a small retail strip in Hicksville, forty-five days can feel generous on paper and short in practice once attorney review, board approvals, and financing conversations enter the picture.

An identification has to be unambiguous. A street address, a legal description, or a distinguishable name for the asset all satisfy the requirement, but a vague description like "a multifamily building in Brooklyn under two million dollars" does not. The notice has to be signed and delivered to your qualified intermediary, not simply noted in an email to your broker or mentioned on a phone call. Sellers sometimes assume a verbal conversation with their intermediary counts as identification; it does not, and a missed written notice inside the window can unravel an otherwise well-run exchange regardless of how close the seller came to meeting the deadline in spirit.

Most exchanges use the three-property rule, which lets you identify up to three potential replacement properties of any value, with no cap on their combined price. This is the option most sellers in Westchester and Long Island reach for when they have a shortlist, say a mixed-use building in New Rochelle, a small office in White Plains, and a retail parcel in Mineola, and want flexibility to close on whichever one survives due diligence and lender underwriting. You are not obligated to close on all three, only to have identified them in writing, and you can later drop candidates that fall through as long as you do not add new ones after day forty-five.

If you want to identify more than three properties, two alternate rules take over. The 200% rule allows any number of identified properties as long as their combined fair market value does not exceed twice the sale price of the relinquished property. This comes up for investors spreading proceeds from a Manhattan sale across several smaller Long Island properties, where a longer list makes sense but the three-property cap would be too restrictive. The 95% rule removes the value cap entirely but requires that you actually acquire ninety-five percent of the total value of everything identified, a threshold that is difficult to satisfy in practice and mostly relevant when a seller expects to close on nearly every property named.

New York real estate runs through attorney-negotiated contracts rather than the standardized offer forms common elsewhere, and co-op and condo boards can add weeks to an approval process that a suburban single-family purchase would never face. A replacement property under contract in the Bronx or Staten Island still needs board sign-off, title work, and often a separate building application before closing, none of which pauses the forty-five-day clock. Sellers who wait until after their relinquished property closes to start looking at replacement candidates are giving up time they will likely need for these New York-specific steps later in the process.