Oregon’s Prior Appropriation System
Oregon follows the doctrine of prior appropriation, meaning water rights are separate from land ownership and are allocated based on who filed first. If you buy a property with water rights, those rights transfer with the land only if they are properly documented and have been used regularly.
Domestic Well Exemption
Most residential wells in Oregon fall under the domestic well exemption, which allows up to 15,000 gallons per day for household use without a water right permit. However, if you plan to irrigate more than half an acre or use water for commercial purposes, you likely need a water right.
Checking Water Right Status
The Oregon Water Resources Department (OWRD) maintains a searchable database of all water rights. I check this for every rural property with irrigation or water features. A water right that has not been used for five consecutive years may be subject to forfeiture, which means the buyer could lose it.
Transfer and Change of Use
If you want to change how a water right is used (for example, switching from agricultural irrigation to a pond), you need to apply for a transfer with OWRD. This process can take six months to a year. It is important to understand the current authorized use before closing.
What This Means for Your Purchase
Water rights add value to rural property, but only if they are valid and usable. I advise my clients to verify the right, confirm it has been exercised recently, and understand any conditions or limitations. If the water right is critical to your plans for the property, make the sale contingent on verification.
