Exchange Guide
Improvement and Build-to-Suit Exchange
How an improvement or build-to-suit 1031 exchange lets Illinois investors use exchange funds to build value into replacement property within 180 days.
An improvement exchange, sometimes called a build-to-suit exchange, lets an investor use exchange funds to add value to the replacement property rather than only buying it as-is. For an Illinois exchanger selling a fully improved Chicagoland property but replacing it with a lower-priced parcel in Rockford or downstate that needs construction work, this structure closes the value gap by directing sale proceeds into improvements instead of leaving cash boot exposed. It works within the same 180-day framework as any other exchange, which is what makes the timing genuinely demanding.
This structure comes up most often for Illinois investors who sell a stabilized, fully built property and want to reposition into a value-add opportunity, such as a Peoria industrial building needing a new roof and dock upgrades or a Naperville retail parcel that needs a ground-up build. Without the improvement exchange structure, that investor would either overpay for an already-improved replacement or leave sale proceeds unspent and exposed to boot.
01
Why the EAT Has to Hold Title During Construction
Because 1031 rules only recognize like-kind real property that already exists at the time of acquisition, an exchanger cannot simply buy raw land and later add improvements using exchange funds while holding title directly, that would count improvements added after the exchanger already owns the property, which does not qualify. Instead, an exchange accommodation titleholder holds title to the replacement property while construction happens, and the improved property transfers to the exchanger once work is far enough along, all before the 180-day deadline closes.
This is the same accommodation entity used in a reverse exchange, and in fact an improvement exchange is often combined with reverse-exchange timing when the Illinois investor needs to acquire and begin improving a replacement property before the relinquished sale has closed. Understanding both structures together, rather than as separate tools, helps an exchanger see why the improvement route almost always adds cost and coordination on top of a standard forward exchange.
02
The 180-Day Construction Window Is the Real Constraint
Construction has to reach a defensible stage of completion within the same 180 days that govern every other exchange deadline, which is far less time than most commercial construction projects normally take. An Illinois investor planning a build-to-suit exchange on a Naperville or Peoria site needs permitting, site work, and at least the bulk of construction lined up before the relinquished property even closes, since design and entitlement delays eat directly into a fixed clock that does not pause for weather, inspections, or supply timelines.
03
What Counts as Value at the End of the Window
Only improvements actually completed and in place by day 180 count toward the exchange value, work that is merely contracted or in progress does not. An Illinois exchanger who plans $500,000 of site improvements on a downstate industrial parcel but only completes $300,000 worth by the deadline can only apply that completed portion, with the shortfall treated as unspent exchange funds subject to boot. This is why realistic scheduling, not optimistic scheduling, drives whether an improvement exchange actually delivers full deferral.
Some Illinois exchangers build in a deliberate buffer by planning fewer improvements than the exchange funds would technically allow, accepting a smaller project scope in exchange for a much higher likelihood of finishing on time. Others prioritize the improvements most likely to be inspected and signed off quickly, saving cosmetic or lower-priority work for after the exchange closes, since only completed value counts toward the deadline regardless of what is still planned.
04
Coordinating Contractors, Lenders, and the Intermediary
An improvement exchange requires tighter coordination than almost any other 1031 structure, since the qualified intermediary, the EAT, the general contractor, and any construction lender all need to move on the same schedule. Improvement exchange planning typically starts before the relinquished Illinois property even goes under contract, and pairing it with lender preflight coordination confirms financing for the construction phase is realistic before the clock starts running.
Permit timelines vary considerably across Illinois municipalities, and a downstate county with a lighter review process can move noticeably faster than a Chicago-area suburb with a more involved planning commission process. Building a realistic construction schedule for an improvement exchange means pricing in the specific permitting reality of wherever the replacement property sits, not a generic national construction timeline that may not reflect local Illinois practice.
Questions
Common questions
Can an Illinois investor build a new structure entirely from raw land using this structure?
Yes, an improvement exchange can fund ground-up construction, though completing enough of the project within 180 days is the main practical limit.
Who holds title to the property while construction is underway?
An exchange accommodation titleholder holds title during construction, since the exchanger cannot directly own the property while exchange funds are still being spent on improvements.
What happens to improvements that are not finished by day 180?
Only completed work counts toward the exchange value, and any exchange funds not spent on completed improvements are treated as boot and become taxable.
Does an improvement exchange cost more than a standard exchange?
Yes, the EAT structure, construction management, and additional legal and intermediary fees typically make an improvement exchange more expensive than a forward exchange.
Can minor repairs or maintenance work qualify as improvements under this structure?
Generally the work needs to add real value to the property rather than simply maintain existing condition, so routine repairs are not the intended use of this structure.
Ready to see how improvement and build-to-suit exchange fits your Illinois 1031 exchange? Talk through the timeline, replacement options, and documentation before the identification clock starts.
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