5.3 Oregon Property Tax, Water Rights & Special Topics
Key Takeaways
- Measure 50 (1997) created a Maximum Assessed Value that may rise only about 3% per year, decoupling taxes from Real Market Value
- Measure 5 (1990) caps total property tax at $10 per $1,000 of Real Market Value for general government and $5 per $1,000 for education
- Oregon taxes the LESSER of Maximum Assessed Value and Real Market Value, so assessed value is often well below market value
- Oregon follows the prior-appropriation doctrine for surface water: water rights are 'first in time, first in right' and generally attach to the land's use, not casual ownership
- Oregon's homestead protection (ORS 18.395) shields a set amount of home equity from certain creditors; it is a creditor exemption, not a property-tax break
Oregon's Two-Measure Property Tax System
Oregon's property tax looks strange to candidates from other states because two ballot measures reshaped it. You must distinguish them.
Measure 5 (1990) — the rate/RMV limit
Measure 5 caps how much tax can be levied per $1,000 of Real Market Value (RMV):
| Purpose | Limit |
|---|---|
| General government | $10 per $1,000 of RMV |
| Education (schools) | $5 per $1,000 of RMV |
When combined district levies on a property exceed those caps, the levies are compressed (reduced proportionally). Measure 5 limits the rate against market value.
Measure 50 (1997) — the assessed-value cap
Measure 50 went further and decoupled the tax base from the market. It created the Maximum Assessed Value (MAV), which was set in 1997 at the property's 1995–96 RMV minus 10%, and then capped MAV growth at roughly 3% per year.
| Concept | Meaning |
|---|---|
| Real Market Value (RMV) | What the property would sell for |
| Maximum Assessed Value (MAV) | A capped figure that rises only ~3%/year |
| Assessed Value (AV) | The lesser of MAV and RMV — the figure actually taxed |
| New construction/improvements | Can reset/add to MAV outside the 3% cap |
Key principle: Oregon taxes the lesser of MAV and RMV. Because MAV has grown only ~3% a year since the late 1990s while markets rose faster, most homes are taxed on an assessed value well below their market value. This is why an Oregon buyer should never assume next year's taxes equal "tax rate × purchase price."
Worked example: A home has an RMV of $500,000 but a MAV of $260,000. Taxes are computed on the $260,000 assessed value, not the $500,000 market value. After a sale, the MAV does not reset to the purchase price (unlike California's Prop 13) — Oregon's MAV simply keeps climbing ~3% a year. A buyer expecting taxes to jump to market value is mistaken; a licensee should direct them to the county assessor for the actual figures.
Water Rights: Prior Appropriation
Unlike eastern "riparian" states, Oregon follows the prior-appropriation doctrine for surface water in rivers and streams. Three ideas drive exam questions:
| Principle | Meaning |
|---|---|
| First in time, first in right | The senior (earlier) water right is filled before junior rights in a shortage |
| Beneficial use | A water right exists only to the extent water is put to a recognized beneficial use |
| Appurtenant to use, not casual ownership | Surface-water rights are administered by the state (Oregon Water Resources Department); owning land does not automatically grant the right to divert a stream |
Exam trap: Buying riverfront land does not automatically convey the right to pump from the river. The buyer must confirm any existing water right and its priority date with the state. Most navigable waterways are publicly owned, and the public has rights in them.
Condominiums and Common-Interest Communities
Oregon condominiums are created under the Oregon Condominium Act (ORS Chapter 100), and planned communities/HOAs under ORS Chapter 94. For the exam:
| Term | Meaning |
|---|---|
| Unit | The individually owned airspace/interior |
| Common elements | Shared areas owned in common (roof, grounds, halls) |
| Declaration / CC&Rs | The recorded document creating the regime and rules |
| Association / HOA | Governs common areas, collects assessments |
| Assessment lien | Unpaid dues can become a lien on the unit |
A buyer of a condo or HOA-governed home should review the declaration, bylaws, budget, and any pending assessments, because unpaid dues and rule violations transfer concerns to the new owner.
The Homestead Exemption (Creditor Protection)
Oregon's homestead exemption (ORS 18.395) protects a set amount of equity in a person's primary residence from most general creditors and judgment liens.
| Feature | Detail |
|---|---|
| What it protects | A statutory dollar amount of home equity |
| From whom | Most general/judgment creditors |
| What it is not | It is not a property-tax reduction |
Exam trap: Oregon's "homestead exemption" is a creditor-protection statute, not a property-tax break. Some materials confuse it with a tax exemption; on the Oregon exam, link the homestead to protecting equity from creditors, while property-tax limits come from Measures 5 and 50.
How a Licensee Uses These Topics
| Buyer question | Correct licensee response |
|---|---|
| "What will my taxes be?" | Direct them to the county assessor; taxes are based on assessed value, not purchase price |
| "Can I draw water from the creek?" | They must verify a water right and its priority with the state, not assume it |
| "Are HOA dues current?" | Review the declaration and obtain an assessment/estoppel statement |
| "Does the homestead exemption lower my taxes?" | No — it protects equity from creditors, not taxes |
Key principle: A licensee explains how these systems work but must not give legal or tax advice — refer buyers to the county assessor, the Water Resources Department, the HOA, and their own attorney or tax professional. On the exam, tie property tax to Measures 5/50, surface water to prior appropriation, and the homestead to creditor protection.
Under Oregon's Measure 50, on what value is a typical homeowner's property tax based?
A buyer purchases riverfront land in Oregon and assumes they may freely pump irrigation water from the adjacent river. Why might they be wrong?
What does Oregon's homestead exemption (ORS 18.395) actually do?