Forty-five days sounds generous until an investor tries to underwrite, tour, and commit to real property inside it. In a market moving as unevenly as Louisville's, that window rewards preparation and punishes anyone who starts the search after the sale closes.
The Window That Starts Whether You're Ready or Not
Identification begins on the day the relinquished property closes and runs a strict 45 calendar days, weekends and holidays included, with no extension outside a federally declared disaster. A list submitted on day 46 is treated as if no list was submitted at all, regardless of how close the investor was to finishing it.
Waiting until after closing to start looking is the single most common way this deadline gets missed, because thirty of the forty-five days can disappear before an investor has toured a single property. Counting from the closing date rather than the offer date also trips up investors who assume the window is tied to when they first started shopping, when in fact nothing before the relinquished closing counts against the forty-five days at all, and nothing after day 45 gets a second chance either.
Why Some Louisville Corridors Move Faster Than Others
Space near the UPS Worldport air-cargo hub tends to move on a shorter cycle than the broader market because logistics tenants and buyers watch that corridor constantly for anything that comes available. Small retail space in NuLu or the Highlands can disappear just as quickly for the opposite reason: inventory is thin and turnover is rare. An investor who assumes a 45-day window gives ample time to react in either submarket is often surprised by how little is actually available when the search starts. Office space along the Hurstbourne corridor tends to move more predictably, with steadier inventory and fewer surprise bidding situations, but even there a well-priced suite with strong existing tenants rarely lingers on the market long enough to be identified as an afterthought.
Building a List Before the Clock Starts
- a primary candidate the investor has already toured or reviewed in detail
- a second candidate in a different corridor as a hedge against financing or diligence problems
- a third slot held open rather than filled with a weak placeholder
- confirmed values on each candidate so the three-property or 200% math is already known
- a broker actively watching new listings before the relinquished sale even closes
What Happens When Day 45 Arrives With Nothing Solid
An investor who reaches day 45 without a defensible identification list has two options: submit whatever is available, even if it is a weak fit, or let the exchange fail and treat the relinquished sale as a taxable event. Neither is a position anyone wants to be in during the final week, which is why the identification list should be drafted well before the sale closes, not started afterward. A rough draft list built during the marketing period for the relinquished property, then refined as real candidates surface, gives an investor a running start instead of a blank page on day one.
Confirming the List Is Actually Filed Correctly
The identification must be in writing, signed, and delivered to the qualified intermediary or another party specified under the rules, describing each property with enough detail that it is unambiguous. A verbal mention to a broker or an email that never reaches the QI does not count, and an investor should confirm delivery rather than assume it happened. Confirming that confirmation in writing, a short reply acknowledging receipt from the QI, closes the loop and gives the investor something concrete to point to if the timing of the list is ever questioned later.
Common 1031 Exchange Questions
When exactly does the 45-day identification clock start?
It starts on the closing date of the relinquished property, not the date the investor decides to begin looking or the date funds reach the qualified intermediary. That start date is fixed regardless of how the sale closing itself was scheduled, and it does not shift even if the investor's own search effectively began weeks earlier.
Can you change your identified properties after submitting the list?
Only until day 45 passes. Properties can be added, removed, or swapped freely before the deadline, but once the window closes the list is locked and cannot be revised even if a better candidate surfaces the next day.
What counts as a valid identification if you haven't toured the property?
The rule requires an unambiguous written description, such as a legal description or street address, not a completed inspection. That said, naming a property sight unseen is a real risk if it turns out to be unworkable once the 180-day closing deadline is bearing down.
Is it better to name exactly three properties or use the 200% approach?
Three properties keeps the math simple and works for most single-replacement exchanges. The 200% approach makes more sense when an investor is intentionally spreading proceeds across several smaller Louisville assets and needs more than three named candidates.
How early should you start looking before your Louisville property sells?
As early as the sale is reasonably certain to close. Waiting for the closing to happen before starting the replacement search routinely burns a third or more of the 45 days on basic groundwork that could have been done in parallel, and in a fast-moving corridor like Riverport or the air-cargo submarket, that lost time can mean the difference between a strong candidate and whatever is left.
