Rooftop rainwater collection with rain barrels is generally allowed in both Oregon and Washington, but a barrel fills quickly in a Northwest storm, so its overflow must be routed away from the foundation. Before disconnecting a downspout from an underground storm connection, check your city's current rules and make sure the water can soak in safely at least several feet from the house and property lines.
Rain barrels
- Use a diverter so the downspout still drains normally when the barrel is full
- Route the overflow hose several feet from the foundation
- Keep a screened, child-safe lid to block mosquitoes and debris
- Use collected water for gardens, not drinking
- Expect the barrel to fill in a single storm in winter
Downspout disconnection
Some older homes in Portland have downspouts piped into the sewer or storm system, and the city ran a well-known downspout disconnection program for years. Rules depend on your lot, soil and location, and some properties are not suitable for disconnection. Check current guidance from your city before changing a connection.
When disconnecting is a bad idea
- The lot is small or slopes toward the house or a neighbor
- Soil drains poorly and water would pool
- There is a basement or chronic crawlspace moisture
- The discharge point would be close to a property line or retaining wall
Frequently asked questions
Is collecting rainwater legal in Oregon and Washington?
Collecting rooftop rainwater for household use like watering gardens is generally allowed in both states. Check local codes for overflow routing.
Can you install a rain barrel diverter?
Yes. We can fit a diverter and extension to your downspout so overflow drains properly.
Need a hand?
- Downspout Cleaning & Repair: Clogged, crushed or disconnected downspouts cleared and rerouted so water leaves your foundation.
- Seamless Gutter Installation: Seamless aluminum gutters formed on-site to the exact length of your roofline, in your color.