Build-to-Suit Exchanges: The Nuances Brokers Ask About Most

Few 1031 structures generate as many questions from brokers as the build-to-suit exchange. The concept is intuitive—use exchange proceeds to construct or improve the replacement property so its value equals or exceeds what was sold—but the execution is governed by rules that are easy to violate and expensive to get wrong. This guide walks through the mechanics and, more importantly, the nuances that separate a clean deferral from a surprise tax bill.

Why a Build-to-Suit Exchange Exists

To fully defer capital gains, a 1031 exchange requires the taxpayer to acquire replacement property of equal or greater value and to reinvest all of the equity. When the ideal replacement property costs less than the relinquished property—or when the investor wants to buy raw land or an underimproved building and add value—a standard exchange leaves cash on the table. That unspent cash becomes taxable "boot."

A build-to-suit exchange solves this by allowing the investor to count the cost of improvements toward the replacement value. If you sell for $2,000,000 and buy land for $700,000, you can direct the remaining $1,300,000 into construction on that land—so long as the improvements are actually completed and paid for within the exchange period.

The Parking Arrangement: Someone Else Has to Hold Title

Here is the structural nuance that surprises most brokers: the taxpayer cannot take title to the replacement property and then build on it. Improvements made to property you already own are treated as services and materials—not like-kind real property—and do not count toward the exchange. To make the improvements count, they must be completed while an Exchange Accommodation Titleholder (EAT) holds legal title.

The EAT is typically a special-purpose LLC formed by the qualified intermediary or accommodator. It "parks" title to the property, uses exchange funds (and any financing) to purchase and improve it, and then transfers the improved property to the taxpayer to complete the exchange. This parking structure is blessed by the IRS safe harbor in Revenue Procedure 2000-37, which governs both reverse and improvement exchanges.

How a Forward Build-to-Suit Works

The 180-Day Trap: Only Completed Improvements Count

This is the single most important nuance to convey to a client. The value of the replacement property is measured at the moment the EAT transfers it to the taxpayer—which must happen by the 180-day deadline. Only improvements that are actually built and paid for by that date count. A signed construction contract, a fully funded budget, or materials sitting in a warehouse do not.

Because construction rarely finishes in six months, most build-to-suit exchanges are planned around what can realistically be completed inside the window: the shell, the pad and site work, or a defined phase—rather than a fully finished, occupied building. Setting that expectation early is where a knowledgeable broker adds real value.

The Rule That Catches Everyone: You Can't Build on Land You Already Own

Brokers frequently ask whether a client can use exchange proceeds to build on land they already hold—or on an adjacent parcel they own. The default answer is no. You cannot receive, as replacement property, improvements to real estate you already own. Once you own the dirt, additional construction is just money spent on your own property, and it does not qualify as like-kind replacement value.

Revenue Procedure 2004-51 tightened this further: the safe harbor does not apply if the taxpayer owned the replacement property within the 180 days before transferring it to the EAT. In other words, you generally cannot sell property to the EAT, have it improved, and take it back as a clean exchange.

Identifying Property That Doesn't Exist Yet

The 45-day identification requirement still applies, which raises an obvious problem: how do you identify a building that has not been built? The rule is that the taxpayer must describe the replacement property and the planned improvements "in as much detail as is practicable" at the time of identification. That means identifying the underlying parcel plus a meaningful description of the construction—square footage, type of structure, and general scope—not merely "improvements to be determined."

The property the taxpayer ultimately receives must be "substantially the same" as what was identified. Modest changes in the construction plan are tolerable; delivering something materially different from the identification can blow the exchange.

Value, Equity, and Boot

To defer the full gain, the taxpayer must acquire replacement value—land plus completed improvements—equal to or greater than the relinquished property's value, and must reinvest all of the net equity. Two ways to create boot in a build-to-suit deal:

• Unspent proceeds: exchange funds not converted into completed improvements by day 180.
• Value shortfall: land cost plus improvements-in-place that still fall short of the relinquished value, even if all cash was spent.

Both are why the construction schedule—not just the budget—drives the tax outcome.

Financing During the Parking Period

Most build-to-suit projects need more than the exchange proceeds to fund construction. Because the EAT—not the taxpayer—holds title during the parking period, the EAT is the borrower of record on any construction loan. Lenders must be willing to lend to a single-purpose EAT entity, usually with the taxpayer providing a guaranty and/or lending funds to the EAT. Lining up a cooperative, exchange-experienced lender early is critical; a bank that has never seen a parking arrangement can stall the entire deal.

The Reverse Build-to-Suit

When the taxpayer needs to acquire and start building on the replacement property before the relinquished property sells, the two structures combine into a reverse build-to-suit. The EAT parks the replacement property, construction begins, and the taxpayer completes the sale of the relinquished property within the same 180-day window. This adds flexibility but also compresses timelines—you are now racing both the sale and the construction against a single clock. For the fundamentals of parking replacement property first, see our reverse exchange guide.

Questions Brokers Ask Us Most

Costs and Practical Considerations

A build-to-suit exchange carries more moving parts—and more cost—than a standard deferred exchange. Expect EAT setup and holding fees, a second set of closing and title costs for the EAT's acquisition and later transfer, potential transfer taxes depending on the state, and lender cooperation on any construction financing. These costs are almost always modest relative to the capital gains deferred, but they should be modeled up front so the client is not surprised.

Because a build-to-suit exchange layers a construction project on top of two real estate closings and strict IRS deadlines, it is not a do-it-yourself transaction. The accommodator, lender, contractor, and tax advisor all have to move in lockstep. That coordination—not the theory—is where deals succeed or fail.