Most 1031 exchanges involve trading one finished property for another. A build-to-suit exchange, sometimes called an improvement exchange, is different: the replacement property gets built or renovated using exchange funds while the clock is already running. That structure can unlock a much better replacement asset than anything available on the open market, but it also introduces a construction timeline into a tax deferral that was never designed around contractors, permits, or weather delays.
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What a Build-to-Suit Exchange Actually Changes
In a standard 1031 exchange, you sell a relinquished property, a qualified intermediary holds the proceeds, and you use those funds to buy a replacement property that already exists. A build-to-suit exchange adds a step: instead of buying a finished building, the exchange funds pay for construction or renovation work on the replacement property before you take title to it in its improved state.
The reason this matters is basic to how a 1031 exchange works at all. You can only defer tax on the value of what you actually receive as replacement property by the time the exchange closes. If you buy raw land for less than your relinquished property sold for and plan to build later with your own cash, the improvements you add afterward do not count toward the exchange. A build-to-suit structure exists specifically so the construction happens inside the exchange period, and the finished value (not just the land) counts toward satisfying the exchange.
The Role of the Exchange Accommodation Titleholder
Because you cannot hold title to the replacement property yourself while construction is happening and still have the transaction qualify as a like-kind exchange, a build-to-suit structure relies on an exchange accommodation titleholder, commonly shortened to EAT. The EAT is typically a special-purpose entity set up by a qualified intermediary specifically to hold legal title to the replacement property temporarily while it is built out.
The EAT uses exchange funds to pay contractors, oversees (or coordinates oversight of) the construction draw schedule, and transfers title to you once the property reaches a value equal to or greater than what the exchange requires. This arrangement is sometimes called a parking arrangement, since the property is effectively parked with the EAT until construction reaches the point where it can be conveyed. Reviewing how a specific EAT structures this arrangement, and who is financially responsible if a contractor is slow to finish, is a conversation worth having before you sign anything.
How the 45-Day and 180-Day Clocks Still Apply
A build-to-suit exchange does not get extra time. The same 45-day identification window and 180-day exchange period that govern every 1031 exchange still apply, which means the EAT needs to acquire the property, begin or continue construction, and reach the target value within that 180-day window from when your relinquished property sold. Identification within 45 days still requires describing the replacement property with enough specificity, which can be tricky when the property is still under construction and its final configuration is not fully settled.
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Why Construction Timelines Are the Biggest Practical Risk
The single biggest source of failed or partially failed build-to-suit exchanges is a construction schedule that runs longer than the 180 days allows. Permitting delays, material shortages, weather, and contractor scheduling conflicts are ordinary parts of any construction project, but in a normal renovation they just push a completion date back. Inside a build-to-suit exchange, a delay can mean the property is not worth enough by day 180 to fully satisfy the exchange, leaving part of the original gain exposed to tax.
Experienced practitioners generally recommend building in significant schedule buffer before committing to a build-to-suit structure, and treating the 180-day deadline as a hard stop rather than a target. Topics worth raising with a contractor and your qualified intermediary early include how much of the planned work realistically needs to happen before day 180, whether a phased approach could satisfy the exchange with less finished work than a full build-out, and what contingency exists if permits are delayed past the point where the original schedule still works.
Improvements Must Be in Place Before the 180-Day Deadline
A detail that surprises many exchangers for the first time: any improvements made to the property after you take title from the EAT do not count toward the exchange, even if construction was already underway and even if the improvements were always part of the plan. Only the value in place at the moment title transfers from the EAT counts. This means the construction schedule and the exchange calendar have to be coordinated closely, with the EAT typically retaining title right up until the value threshold is met, rather than transferring early as a matter of convenience.
Financing a Build-to-Suit Exchange
Construction financing adds another layer of coordination. If a lender is involved, the loan often needs to be structured so the EAT (not you personally) is the borrower during the construction period, since the EAT holds title. Some lenders are unfamiliar with this structure and require additional legal review before they will originate a loan to a special-purpose EAT entity, which can itself add weeks to a project timeline that is already tight against the 180-day clock.
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Debt replacement rules that apply to ordinary 1031 exchanges also apply here. If the relinquished property carried a mortgage, the replacement property generally needs to carry equal or greater debt, or you need to bring additional cash to the deal, in order to avoid taxable boot. Working through how the construction loan interacts with this requirement is a topic for your tax advisor and the EAT's counsel well before ground is broken.
Choosing a Qualified Intermediary and EAT Together
Not every qualified intermediary offers EAT services, and among those that do, experience with build-to-suit structures varies considerably. Because this is a more operationally involved structure than a standard exchange, it is worth asking directly how many build-to-suit exchanges a prospective QI has completed, how they handle construction draw approvals, and what happens procedurally if a project runs past day 180 despite everyone's best efforts.
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The Federation of Exchange Accommodators maintains resources and a membership directory specific to qualified intermediaries and exchange accommodation titleholders, which is a reasonable starting point for narrowing a list of providers who specialize in this particular structure rather than general exchange work only.
Tracking the Numbers Alongside the Construction Schedule
A build-to-suit exchange generates more paperwork than a standard exchange, since draws against exchange funds, contractor invoices, and any additional cash contributed to cover a funding gap all need to be documented in a way your tax advisor can reconcile against the exchange's final numbers. Missing documentation on a single draw is a common reason a tax return preparer has to go back and request records months after a project closes, when contractor invoices are harder to track down.
It helps to agree upfront with the EAT and your tax advisor on how draw records will be shared and how often, rather than waiting until tax season to reconstruct a full paper trail from a construction project that may have run for several months. The National Association of Realtors publishes general background on exchange mechanics that can be a useful refresher before that conversation, alongside whatever your own tax advisor provides specific to your situation.
Common Structuring Questions to Raise With Your Advisors
Before committing to a build-to-suit exchange, a short list of questions tends to surface the issues that matter most. How much construction realistically needs to be complete by day 180, given the current identification and the specific property? Who bears the cost if the project runs over budget while the EAT holds title? How is the draw schedule verified, and by whom? What happens to unused exchange funds if the project finishes under budget? Answering these before signing an exchange agreement is far less expensive than discovering the answers midway through construction.
The American Bar Association publishes practice-area resources through its real property section that cover exchange structuring at a level of detail beyond what most general audiences need, but which your own real estate attorney may reference when drafting the EAT agreement specific to your project.
Where a Matching Service Fits Into This Kind of Planning
A build-to-suit exchange typically involves more coordinating parties than a standard exchange: a qualified intermediary, an EAT, a construction lender, a general contractor, and your own tax and legal advisors, all working against the same 180-day deadline. Capivise's advisor matching service helps connect investors with financial advisors who have experience coordinating exactly this kind of multi-party, deadline-driven transaction, rather than leaving you to assemble that team from scratch under time pressure. For exchanges specifically, Capivise's 1031 and DST advisor matching narrows the search to advisors whose practice regularly touches exchange timing questions like the ones raised here.
Capivise also maintains a list of questions to ask an advisor before you engage one, and a page describing how advisor verification works during matching, both of which are useful background before your first conversation with a prospective advisor about a build-to-suit structure specifically.
A Short List of Topics Before You Commit
Build-to-suit exchanges can unlock replacement properties that would not otherwise be available in your market and price range, but the structure trades that flexibility for tighter coordination and less room for schedule slippage than a standard exchange. Before signing an exchange agreement that relies on an EAT, it is worth reviewing the realistic construction timeline against the 180-day deadline, confirming how the qualified intermediary has handled build-to-suit exchanges in the past, clarifying who is financially responsible for cost overruns during the EAT's holding period, and understanding exactly how the debt replacement requirement will be satisfied given the construction financing involved.
None of this replaces guidance from a qualified intermediary, a tax advisor familiar with 1031 mechanics, and a real estate attorney reviewing the specific EAT agreement. The IRS publishes general guidance on like-kind exchanges that is worth reading before that first conversation, if only so the questions you bring to your advisors are informed by the underlying rules rather than secondhand summaries of them. The SEC's investor education site is also a reasonable plain-language starting point if any part of the replacement structure involves a fund or pooled investment vehicle alongside the direct real estate. Reviewing Capivise's security and privacy practices is also worth a few minutes if you plan to share exchange or financing details with a matched advisor through the platform.
