Memorial Day closure

Most City of Portland offices will be closed Monday, May 27, in observance of Memorial Day.

Services, Guides, and Information

50 services and resources found
Schedule a free 15-minute meeting with a construction, zoning and development expert. Ask questions about building permit submittal requirements and zoning. Get help with the permit process, ask zoning requirements questions, building codes and more. Language access is available.
The 2020 Stormwater Management Manual (SWMM) became effective Dec.14, 2020. The manual sets City policy and design requirements for stormwater management on all development, redevelopment, and improvement projects on both public and private property in Portland.

About Green Streets

Green streets reduce sewer overflows and backups by slowing and absorbing stormwater runoff from sidewalks and streets. Also known as rain gardens or bioswales, green streets are important to the City’s sewer and stormwater systems. They also help prevent pollution from washing into our rivers.
Spanning 20 years at a ratepayer investment of $1.4 billion, the Big Pipe Project has reduced combined sewer overflows to the Willamette River by 94 percent and to the Columbia Slough by 99 percent. With most overflows eliminated, the Willamette is cleaner than it’s been in decades.


Basins collect rainwater to control flooding and prevent erosion. They are an attractive way to manage the rain on your property and can add interest to your landscape. They are most suitable for large, open spaces. 
Contribute to your community and help keep Portland’s rivers clean as a Green Street Steward. You can adopt a green street planter and help to take care of them between regular City maintenance visits. Read more about the program and find out how you can become a Green Street Steward.

Clean River Rewards

Does the rain that runs off your roof safely soak into the ground on your property instead of going into the city’s sewer and stormwater pipes? As a homeowner or renter, you could save up to $130 a year on the on-site stormwater charges of your bill. Commercial property owners could save even more.
Where soils soak up water and yards don’t have steep slopes, disconnecting your downspouts to direct water from your roof to your yard can be a simple, inexpensive, effective, and easy way to manage the rain on your property.


A drywell is a long-term and low-maintenance way to manage the rain on your property. It may be a good solution for a property where erosion and flooding are a frequent concern. Drywells are underground, so they will not change the visual appearance of your space.


Ecoroofs are an attractive way to manage the rain on your property without altering the landscape. An ecoroof, also known as a green roof, can be a good solution for properties with little or no yard or patio space.
Guidance document from the Environmental Protection Agency for industrial stormwater permittees who would like to apply for No Exposure Certification. Publication date: June 2000.

Flood Safety

Flooding can damage property and threaten lives. Stay informed, be prepared, and stay safe. This information is useful if you know a flood may be coming. For long term preparation of your home, see How to Prepare if You Live or Work in a Floodplain.
The Green Street Steward program isn’t just for individuals. Businesses and non-profit organizations can volunteer to adopt green street planters in their neighborhoods, too. Caring for a green street is an easy way to be a good neighbor. Keep the area near your business looking green and inviting.
This guidance can help applicants and designers understand how the City's Stormwater Management Manual requirements apply to construction projects in the public right-of-way.
By approving the Central City 2035 Plan, Council enacted a new ecoroof requirement that applies to most buildings in the Central City Plan District. Here, we provide clarification for how the requirement of CC2035 relates to the Stormwater Management Manual.
Thank you for managing the rain on your property! Follow these important steps to make sure your rain garden, basin, planter, swale, disconnected downspouts, or other stormwater management facility keeps working safely and as designed.
Use the guidance below to determine if your right-of-way project triggers requirements of the 2020 Stormwater Management Manual.
When public improvements require stormwater management, four options are potentially available to meet SWMM requirements in the right-of-way depending on the specific characteristics of the project. Projects can include a combination of these options.
Low-lying areas by creeks and rivers are called floodplains and have a higher chance of flooding. Do you live or work in a floodplain? Find out about your flood risk and ways to protect yourself and your property.
Trees are a readily available, natural way to manage the rain on your property. Trees are easy to plant, low-cost, and most property owners can do the work themselves. Learn about the types of trees best suited for your property before planting.
Portland may be the Rose City, but we’re just as well known for our rainy weather. We get an average of 37 inches of rain each year. You might wonder, “where does all that rain go?” Read on to learn how rain becomes stormwater, and how Environmental Services manages the challenges it causes.
Invasive plants can reproduce rapidly and spread quickly, taking space, nutrients, water, and light from other plants. If uncontrolled, they can damage parks, streams, and infrastructure. Learn more about the damage caused by invasive plants.

Johnson Creek Flood Gauge

External Resource
This resource from the National Weather Service shows the current and predicted flow and flood stage of Johnson Creek at the Sycamore Gauge below Powell Butte and near SE Foster Road and 150th Avenue.
Stormwater management solutions such as rain gardens, rain barrels, ecoroofs, or trees can help manage the rain on your property to protect our rivers and streams. Learn more about the different stormwater management solutions here.