An improvement exchange, sometimes called a build-to-suit exchange, lets an investor use exchange funds not just to buy replacement property but to construct or renovate it before the acquisition period closes. It solves a real gap for investors whose relinquished property sold at a value that doesn't match anything available to buy as-is on the market. The structure is powerful but unforgiving on timing, since every dollar spent has to result in completed, inspected work before the same 180-day clock that governs a standard exchange runs out.
What an Improvement Exchange Is Built to Solve
A seller who nets $2.8M from a relinquished sale but only finds a $2.1M replacement building on the market faces a value shortfall that would otherwise create boot. An improvement exchange lets that investor apply the remaining $700,000 toward construction or renovation on the replacement property itself, closing the value gap with improvements rather than leaving cash on the table at closing. This comes up often in the Portland metro, where a well-priced relinquished sale can outpace what's actually listed and move-in ready in a comparable submarket. It also gives an investor a path to acquire a lower-priced building with strong bones and bring it up to a comparable standard, rather than settling for a fully finished asset priced above what the exchange proceeds alone would cover.
Who Holds Title While Construction Happens
An investor cannot use exchange funds to improve property they already own directly, since that would mean spending exchange proceeds on an asset already in their name rather than acquiring like-kind property. Instead, an exchange accommodation titleholder holds the replacement property during construction, using exchange funds to pay contractors under a construction management arrangement, then transfers title to the investor once the improvement period ends. The investor typically manages the project in practice, selecting the contractor and approving draws, while legal title stays with the titleholder until the transfer at the end of the exchange. This same accommodation structure is what a reverse exchange also relies on, and the two are often combined when an investor needs to both park a purchase and build out the replacement property at once.
Why All Construction Must Land Inside 180 Days
The improvements have to be substantially complete, or at minimum funded and titled correctly, within the same 180-day acquisition window that governs every exchange. Construction projects routinely slip past their original schedule for reasons that have nothing to do with the exchange, permitting delays, material lead times, or a contractor's own backlog, all of which the tax code doesn't accommodate with additional time. A project that clears permitting in Washington County in six weeks might take considerably longer inside Portland city limits, which is a scheduling difference worth confirming before committing to a scope of work.
Sizing the Improvement Budget Against Exchange Value
Only completed, in-place improvements count toward exchange value at the deadline, not signed contracts or committed budgets, so a realistic construction schedule matters more in an improvement exchange than in almost any other exchange structure. Investors who size the improvement budget against what a contractor can genuinely finish, inspected and in place, within the window avoid the common trap of overcommitting to a scope that looks achievable on paper but isn't given permitting timelines in the Portland metro. A phased scope, prioritizing the improvements that carry the most value relative to their construction time, tends to protect more of the exchange than an ambitious full renovation started too late in the window.
What Happens to Unfinished Work at Day 180
Improvements still under construction but not complete by day 180 generally don't count toward the exchange value, which can leave a shortfall that gets treated as boot even though the money was spent on the property itself. Investors running tight construction timelines typically build in a buffer of several weeks against permitting or inspection delays rather than scheduling completion for the deadline itself. Once the titleholder transfers the property to the investor at the close of the exchange, any remaining work simply becomes a normal renovation project funded outside the exchange structure.
Common 1031 Exchange Questions
Can I use exchange funds for repairs after I already own the replacement property?
No, exchange funds generally can only be used for improvements made before the investor takes direct title, while the accommodation titleholder still holds the property during the exchange period.
Does the improvement have to be fully finished by day 180?
Generally yes, only completed, in-place work counts toward the exchange value at the deadline, so unfinished construction can leave a value gap treated as boot.
Can I improve a property I already own using this structure?
No, exchange funds cannot be spent improving property already titled to the investor, which is why the accommodation titleholder holds the replacement property during construction until the improvement period ends.
Who actually pays the contractors during an improvement exchange?
The exchange accommodation titleholder pays contractors from held exchange funds under a construction management arrangement, rather than the investor paying directly, even though the investor typically directs the day-to-day scope and schedule.
Is an improvement exchange more expensive to run than a standard exchange?
Yes, the additional titleholder entity, construction management, and legal structuring typically add cost beyond a standard forward exchange, which is worth weighing against the value of closing the price gap with construction rather than accepting boot.
