Exchanging Water Rights Under Section 1031: When Water Is Real Property — and When It Is Not
The short version: A water right can be exchanged tax-deferred under §1031 — but only when two things are true. First, the right must be classified as real property under the state law where the water sits. Second, it must be a perpetual interest, not one limited in duration, quantity, or priority. A senior, deeded, perpetual right that runs with the land is usually the easy case. A short-term delivery contract, a revocable allocation, or a right capped in amount and years behaves like a contract for a commodity — and does not qualify. Everything below is about telling those two apart before you sign.
On most of the working ground west of the hundredth meridian, the sentence I hear more than any other is some version of: "The water is worth more than the dirt." It usually is. And increasingly, water is not simply sold with a farm — it is severed, leased, banked, and traded on its own, to cities, to other irrigators, to environmental buyers restoring instream flows. Once water starts moving independently of the land, the tax question sharpens: when an owner sells a water right by itself, can the gain roll into a like-kind exchange, or is it a fully taxable sale?
The answer is genuinely it depends — but it depends on a small number of things that are knowable in advance. This piece is the deep version of a subject I touched only briefly in our companion article on exchanging farms, ranches, and timberland. There, water was one asset in a larger bundle. Here, water is the asset.
First principles: §1031 only defers real property — and the 2020 regulations define what counts
Since the Tax Cuts and Jobs Act of 2017, §1031 applies only to real property. Personal property — equipment, livestock, and yes, a bare commodity contract — no longer qualifies at all. So the entire water-rights question collapses into one prior question: is this particular water right real property for §1031 purposes?
Before 2018 the Code left "real property" largely undefined, and practitioners leaned heavily on state law to answer that. That changed with the final real-property regulations under Treas. Reg. §1.1031(a)-3 (T.D. 9935, 2020), which supply a genuinely federal definition. Under those regulations, property is real property for §1031 if it meets any of three independent tests: (1) it is classified as real property under the law of the state or local jurisdiction where it sits; (2) it is one of the items the regulation specifically lists as real property — "land and improvements to land, unsevered natural products of land, and water and air space superjacent to land"; or (3) it satisfies the regulation's facts-and-circumstances analysis, including the federal test for certain intangible interests. So, to answer the question head-on: yes — federal law now defines certain water as real property in its own right, with no state-law hook required.
The catch — and the reason state law still does so much of the work here — is which water that per-se federal listing actually reaches. "Water and air space superjacent to land" is water in place: the water column and space over a parcel. (The regulation's own example is marina boat slips and end ties, which it treats as water space superjacent to land.) A severed, transferable appropriation water right — the thing actually being sold in most Western water deals, a right to divert a defined quantity with a priority date, detached from any particular parcel — is not "water superjacent to land." It is a usufructuary right, and the regulations analyze it as an intangible interest. That is where the other two tests come back in, and why the state-law characterization and the perpetual-versus-limited question below still decide most real cases.
That is also why two economically identical water rights — same acre-feet, same crop, same river — can land on opposite sides of the §1031 line: because they sit in states that characterize them differently, or because one is held as an appurtenance to land and the other has been severed and sold on its own.
The two water-law systems, and why the system matters
Broadly, American water law runs on two doctrines, and a handful of states blend them.
Riparian rights dominate in the water-rich East. A riparian right belongs to the owner of land that touches a watercourse, and it is a right to reasonable use shared with other riparians. Because the right is fundamentally an incident of owning the streamside land, riparian rights are almost always treated as real property that runs with the land — and they are rarely sold apart from the land, which means they rarely generate a standalone exchange question.
Prior appropriation governs the arid West — Washington, Oregon, Idaho, Montana, Nevada, Utah, Colorado, Arizona, New Mexico, and others. Here the governing principle is "first in time, first in right." A right is established by putting water to beneficial use, it carries a priority date that ranks it against every other right on the source, and — critically — it can exist independently of any particular parcel and can often be sold, leased, or moved to new land and new uses with state approval. Prior-appropriation rights are where nearly all of the interesting §1031 questions live, precisely because the right can be severed from the land and traded on its own.
A number of states (California, Oklahoma, Texas, and others) are hybrid jurisdictions that recognize both doctrines, which makes local characterization essential rather than optional.
The crux: appurtenant versus severed
If you take one distinction from this article, take this one.
Appurtenant water rights are attached to, and run with, a specific parcel of land. When irrigated farmland is sold, its appurtenant water rights ordinarily pass with the deed as part of the real property being conveyed. In an exchange, appurtenant rights are usually the easy part: they travel with the land, they share the land's real-property character, and they do not present a separate qualification problem. The relinquished property is "irrigated farmland," the water comes along, and the whole thing is real property.
Severed rights — water rights that have been legally detached from the land and are owned, and sold, on their own — are where the analysis gets real. Once a right is severed, it is no longer riding on the land's coattails. It has to qualify on its own terms as an interest in real property under state law. Sometimes it plainly does. Sometimes it does not. And sometimes what is being sold is not a property right at all, but a contract to receive a quantity of water — which is a different animal entirely.
The practical takeaway: how the water is held determines how it is taxed. The same wet acre-feet can be an exchangeable real-property interest or a taxable commodity contract depending entirely on the paper.
The controlling authorities
The doctrine here is stable and has been for a long time. Four authorities do most of the work.
Rev. Rul. 55-749 is the foundation. In it, the IRS held that perpetual water rights, where classified as real property under applicable state law, are like-kind to a fee interest in land and may be exchanged tax-deferred. The ruling turns on two criteria that have framed every analysis since: the right must be (1) real property under state law and (2) granted in perpetuity. The ruling was careful to distinguish rights to a specific total amount of water, or a specific amount for a limited period — signaling early that duration and quantity limits are where qualification breaks down.
Treas. Reg. §1.1031(a)-3, the final real-property regulations issued in 2020, are the modern federal definition — and they matter more than practitioners sometimes assume. As noted above, they classify property as real property on any of three independent bases: state-or-local-law classification, the regulation's per-se list (which expressly includes water and air space superjacent to land), or a facts-and-circumstances analysis. They also confirm that unsevered natural products of land — including water — are real property until severed (once severed, they become personal property).
For a severed water right analyzed as an intangible interest, the regulation supplies its own federal test, independent of any state-law label: an intangible is real property if it derives its value from real property or an interest in real property and is inseparable from that real property. A license or permit solely for the use, enjoyment, or occupation of land — in the nature of a leasehold or easement — qualifies; a license or permit to operate a business on real property does not, regardless of what state law calls it. A perpetual appropriation right that lets its holder divert and put water to beneficial use on land sits comfortably in the first category; a term contract merely to be delivered a quantity of water looks far more like the second.
The regulations also address a fact pattern that matters enormously in irrigated agriculture: shares in a mutual ditch, reservoir, or irrigation company described in §501(c)(12)(A) are treated as real property for §1031 purposes if, at the time of the exchange, the company is organized in a state that recognizes those shares as real property, or the shares have been recognized as real property by the state's highest court. (More on mutual-company shares below — they are their own trap and their own opportunity.)
PLR 202309007 (2023) is the modern confirmation. There, the IRS treated a perpetual water license — a set annual volume, no sunset date, terminable only if the water was not put to beneficial use — as real property, like-kind to a fee interest in real estate. The ruling expressly distinguished Wiechens, resting on the license's perpetual character and its state-law real-property classification. One caution worth stating plainly to any client: a private letter ruling may not be cited or used as precedent under IRC §6110(k)(3). It binds only the taxpayer who requested it. PLR 202309007 is enormously useful as a window into current IRS thinking, but it is not authority you can hang a return on.
Wiechens v. United States, 228 F. Supp. 2d 1080 (D. Ariz. 2002) is the cautionary case, and it is the one to remember. There, the taxpayers exchanged into water rights that were limited in duration, quantity, and priority — and the court held they were not like-kind to a fee interest in farmland, even though Arizona law treated them as an interest in real property. Being real property under state law was necessary but not sufficient. The rights simply were not comparable to a perpetual fee; they behaved more like a term contract for a defined amount of water. Wiechens is the reason "it's real property under state law" is only ever half of the answer.
Putting the authorities together: the two-part test
Stack the statute, the regulation, and the case law and a clean two-part test emerges. A standalone water right qualifies as §1031 real property only if both are true:
- Real property under the §1031 definition. The right must clear the regulation's real-property definition — most reliably because it is classified as real property under the state or local law where the water sits, but alternatively because it satisfies the regulation's federal intangible-interest test (value derived from and inseparable from real property, and not a mere license to operate a business). Most prior-appropriation states — Washington, Oregon, Idaho, California among them — treat perfected water rights as real property or as an interest that runs with real property, which is usually the cleanest way to satisfy this prong.
- Perpetual, not limited. The right must be perpetual in character — not capped to a specific total quantity, not limited to a term of years, and not so junior and conditional that it behaves like a revocable allocation. This is the part Wiechens failed and the part PLR 202309007 passed.
Fail either prong and the exchange fails. A right that is real property under state law but limited to a 50-year delivery term does not qualify. Neither does a right dressed up as real property that is, in substance, a contract to be delivered a commodity. You need a real-property interest and a perpetual one.
Mutual ditch, reservoir, and irrigation-company shares
A large share of Western irrigation water does not arrive as a right the farmer holds directly. It arrives through a mutual ditch, reservoir, or irrigation company, and the farmer owns shares in that company that entitle him to a proportionate delivery.
Historically this was a §1031 problem, because §1031 has always excluded stocks, bonds, and notes from like-kind treatment — and mutual-company "shares" look like stock. The Food, Conservation, and Energy Act of 2008 fixed this directly: it amended §1031 to provide that shares in a mutual ditch, reservoir, or irrigation company described in §501(c)(12)(A) are not treated as stock for purposes of the stock exclusion, if at the time of the exchange the company is organized in a state that recognizes those shares as real property, or the shares have been recognized as real property by the highest court of the state. The 2020 regulations carry the same rule forward.
The result: mutual-company shares can be exchangeable real property — but only where the state (by statute or high-court decision) characterizes the shares themselves as a real-property interest. For a grower whose water comes through a mutual company, the single most important due-diligence question is often not "how many acre-feet" but "how does this state characterize these shares?" That answer can be the entire difference between a deferred exchange and a taxable sale, and it needs to be run down long before a purchase-and-sale agreement is signed.
Where the standalone deals go wrong
The failure patterns are consistent, and all of them trace back to selling something that is not, in substance, a perpetual real-property interest:
- A water-delivery or supply contract. If what is being sold is a contract right to receive a quantity of water — a district delivering water under a term agreement, for example — that is a commodity contract, not real property. It does not qualify, and no amount of careful escrow structure changes the underlying character.
- A term-limited or quantity-capped right. The Wiechens fact pattern. A right good for a set number of years, or capped at a specific total volume, reads as a term interest rather than a perpetual estate.
- A junior, conditional, or interruptible allocation. A right so low in priority that it is regularly curtailed, or one held at the sufferance of a district or agency, can look more like a revocable license than an ownership interest.
- Severed water in a state that treats it as personal property. Rare in the arid West, but the characterization must be confirmed, not assumed.
- Relinquished-property mismatch. Exchanging a fee interest in irrigated land for a bare severed water right (or vice versa) can work when both are real property — but the further the two assets drift apart in character, the more the like-kind and quality analysis has to be defensible on its own.
Structuring pointers
When a water right — alone or as part of a larger sale — is going into an exchange, a few practices keep the transaction on the rails:
- Confirm state-law characterization in writing, up front. Before anything else, establish that the specific right (or the specific mutual-company shares) is real property under the governing state's law. This is a legal-research question with a definite answer; get it answered before the PSA is drafted.
- Paper the water as a perpetual, deeded real-property interest wherever the deal structure allows — not as a cutting-style delivery contract or a term supply agreement. Substance controls, but the paper is strong evidence of substance.
- Keep appurtenant water appurtenant when the goal is simply to exchange irrigated farmland. Do not sever a right you do not need to sever; severance converts an easy case into a hard one.
- Match the relinquished and replacement property in character. Perpetual real-property water for a fee interest in land, or for other perpetual real-property water, is the comfortable pairing. The more the two sides resemble each other as real-property estates, the stronger the exchange.
- Put a qualified intermediary in place before closing. As with any exchange, the QI has to hold the proceeds; the taxpayer cannot touch them. This is mechanical, but it is also the most common way a good exchange is blown.
- Allocate the price on purpose in a mixed sale. When water is sold along with land, equipment, and other assets, allocate deliberately in the contract so the real-property (exchangeable) slices are separated from the personal-property (taxable) slices before closing, not reconstructed afterward.
The Washington angle
Washington is a prior-appropriation state (with some riparian history folded in), and it treats a perfected water right as an interest that runs with the land and is real property in character — which ordinarily satisfies the first prong of the §1031 test. But Washington adds two wrinkles worth flagging.
Transfers and changes require Ecology approval. Under RCW 90.03.380, any change to a water right — a new point of diversion, a new place of use, or a new purpose of use — requires the approval of the Department of Ecology, and it may not impair existing rights. Ecology makes a tentative determination of the extent and validity of the right in the process. For an exchange, that means a severed right being moved to new land is not simply "deeded over"; it runs through a state administrative process, and the extent and validity Ecology recognizes may differ from what the paper says. That timing and that uncertainty need to be built into the exchange calendar, not discovered inside the 180-day window.
Relinquishment for nonuse. Washington's "use it or lose it" statutes, RCW 90.14.130–.180, provide that a certificated or claimed water right (permits are treated differently) can be relinquished — reverting to the state — after five successive years of nonuse without sufficient cause. RCW 90.14.140 lists the recognized "sufficient cause" exceptions: drought, active legal proceedings, pending change applications, and specific municipal, standby, and state trust-water exemptions, among others. This matters to an exchange in a concrete way: a right that has quietly gone unused for years may be impaired or partially relinquished before it is ever sold. Diligence on the actual recent use history of the right is as important as diligence on the paper title.
And the reason all of this is worth the trouble in Washington specifically: the state now imposes a capital gains tax whose statutory design excludes gains on the sale of real property. For a Washington owner, keeping a water sale on the real-property side of the line is not only a federal-deferral question — it also bears on the state capital-gains analysis. The characterization work pays off twice.
Bottom line
Water is the rare asset that can be, in the same breath, the most valuable thing in a deal and the least understood. Under §1031 the doctrine is actually settled: a perpetual water right, classified as real property under the governing state's law, is like-kind to a fee interest in land and can be exchanged tax-deferred. A right that is limited in time, quantity, or priority — or that is really a contract to receive a commodity — cannot. Rev. Rul. 55-749 drew the line seventy years ago; the 2020 regulations, PLR 202309007, and Wiechens have only sharpened it.
The owners who exchange water successfully are the ones who answer two questions before they sell: Is this right real property under this state's law? and Is it perpetual, or is it limited? Everything else — the QI, the deadlines, the deed language — is mechanics. The characterization is the ballgame.
As an attorney-led qualified intermediary working both sides of the Cascades — from the irrigated orchards and vineyards of Central Washington to the farm ground of the Puget Sound lowlands around Tacoma and Pierce County — we help owners and their advisors run exactly these lines before a purchase-and-sale agreement is ever signed. If you are contemplating a sale in which water is a meaningful part of the value, the time to sort the water question is now, not after closing.
Disclaimer: This article is for general educational purposes and is not legal or tax advice. The characterization of water rights under §1031 depends heavily on the law of the state where the water is located and on the specific facts of each transaction. Private letter rulings, including PLR 202309007, may not be cited or relied upon as precedent under IRC §6110(k)(3). Please consult your own tax advisor about your particular situation before acting.
