Sometimes the ideal replacement property does not exist in finished form. An improvement exchange, also called a build-to-suit exchange, lets an exchanger use a portion of the exchange proceeds to construct new improvements or renovate an existing structure on the replacement property, with those improvements counting toward the value needed to fully defer gain from the relinquished sale.
This matters in North Carolina markets where a relinquished property sold at a high value might not have an equivalent finished replacement on the market, but raw land or a dated building with renovation potential is available and can be brought up to comparable value through construction.
Why the improvements have to happen before the exchanger takes title
An exchanger cannot buy a replacement property outright, take title, and then use exchange funds to renovate it, because at that point the funds would be spent on property the exchanger already owns rather than being used to acquire like-kind property. Instead, an exchange accommodation titleholder holds title to the replacement property while construction proceeds, funded through the qualified intermediary, and the exchanger only takes title once the improvements are complete or the 180-day period runs out, whichever comes first.
The 180-day limit applies to construction too
This is the detail that catches exchangers off guard: all construction has to be substantially completed, and title transferred, within the same 180-day window that governs every other 1031 exchange. There is no separate, longer timeline for construction projects. Only improvements actually in place and paid for by day 180 count toward the exchange value. A partially built structure still counts at whatever value it has achieved by that date, not at the eventual finished value, which means slow permitting or weather delays can directly reduce the tax deferral achieved.
Because of this hard limit, improvement exchanges work best for renovation projects or straightforward construction that can realistically finish within six months, not ground-up development on a longer construction schedule.
How improvement value is measured
The value credited toward the exchange is the fair market value of the property, land plus completed improvements, as of the day title transfers to the exchanger. Materials purchased but not yet installed, or contracts signed but not yet performed, generally do not count toward that value. This is why improvement exchanges require close coordination between the contractor's draw schedule and the exchange deadline from the very start of the project.
Practical constraints beyond the deadline
Financing a build-to-suit exchange adds a layer most standard exchanges do not have: a construction lender has to be comfortable extending funds against property held by an EAT rather than directly by the exchanger, and draw schedules have to be structured so the property's value keeps pace with the exchange calendar rather than the contractor's own preferred sequencing. Permitting delays, which vary significantly between fast-moving municipalities and rural counties with smaller planning departments, are worth accounting for well before the relinquished property even closes.
Choosing between improvement and forward exchange structures
An improvement exchange is not the default choice, it is a fallback for situations where a finished, equivalent-value replacement property genuinely is not available on the timeline the exchange requires. Given the added cost, the added financing complexity, and the hard construction deadline, exchangers who can find a finished property that meets the equal-or-greater value standard are almost always better served by a standard forward exchange. The improvement structure earns its added complexity specifically when the value gap between the relinquished property and available finished replacements cannot be closed any other way.
Common 1031 Exchange Questions
Can you use exchange funds to renovate property you already own?
No, the improvement has to happen on the replacement property while it is held by an exchange accommodation titleholder, before the exchanger takes title. Improving property already owned by the exchanger does not qualify.
What happens if construction is not finished by day 180?
The exchange still closes on day 180 with whatever value has been completed and paid for by that date. Unfinished work does not count toward the exchange value, even if it is contracted and scheduled.
Is an improvement exchange more expensive than a standard exchange?
Yes, it involves forming and maintaining an exchange accommodation titleholder entity, additional legal documentation, and often more complex financing, all of which typically raise the overall cost compared to a straightforward forward exchange.
Can you buy raw land and build a new structure from the ground up?
Yes, this is a common use of the structure, though ground-up construction has to realistically finish within 180 days, which limits it to smaller or fast-track projects rather than large-scale development.
Does the contractor need to know this is part of a 1031 exchange?
Yes, the draw schedule and completion timeline need to be built around the exchange deadline from the outset, since a contractor working on a normal project timeline may not account for the hard 180-day cutoff.
