Gutter Installation in Portland, OR

Local know-how

Gutters in Portland: what local homeowners should know

Portland’s rainy season runs from fall through spring, and Douglas firs, maples and oaks keep gutters full of needles and leaves. Gutter guards, especially micro-mesh, are one of the most common upgrades in the metro.

Older homes in neighborhoods like Laurelhurst, Sellwood and Irvington often have aging gutters, while newer homes in Washington County and Clark County need guards as trees mature. Downspouts that drain properly protect basements and crawl spaces.

Key facts: gutters in Portland, OR

• Typical cost: Angi puts the local average at about $1,217; most projects run $689 to $1,810.
• Does a gutter contractor need a license in Oregon? Yes. Contractors working on homes must be licensed by the Oregon Construction Contractors Board. Look up the license, bond and insurance on the CCB website.
• Common choice: seamless aluminum K-style gutters in 5- or 6-inch sizes; 6-inch with 3x4-inch downspouts for large roofs and heavy rain.
• How to get connected: call the number on this page and you are connected with an independent local installer who serves your ZIP code. The call is free and there is no obligation.

Updated November 2026. Sources are listed at the end of this page.

Rain from October to May

Portland International Airport averages 36.92 inches of precipitation a year (NWS Portland, 1991–2020 normals). The pattern is what matters: November, December and January each average more than 5 inches, while July and August average about half an inch. Gutters work almost every day for eight months, then sit dry all summer while needles and debris collect.

Portland’s tree canopy is a big part of its character, and a big part of its gutter problem. Douglas firs, cedars, maples and oaks drop needles, cones, seeds and leaves, and by the time the fall rains start, gutters that were not cleaned or guarded overflow at the first storm.

Moss on Portland roofs

Oregon State University Extension, based in Corvallis, notes that in the moist Pacific Northwest moss on roofs is inevitable. Moss traps debris and moisture, can lift shingles and slows water flowing off the roof. OSU recommends trimming trees for more sunlight as the best long-term control, and says zinc strips or galvanized flashing near the ridge can inhibit regrowth.

For gutters, moss is a steady source of clogs: clumps wash down in heavy rain and after any roof treatment. Guards that stop needles and moss, larger downspouts, and cleaning after moss treatment are the practical answers. See moss, needles and gutters.

Typical costs in Portland

These are published cost figures for orientation only, not quotes. City averages include smaller jobs such as partial runs; a full seamless system on a large or two-story home usually lands at the upper end of the range or above. The installer you are connected with measures your home and gives you the actual price.

More detail: gutter and gutter guard cost guide.

Oregon and Washington licensing

In Oregon, contractors who work on homes must be licensed by the Construction Contractors Board (CCB). Gutter contractors typically hold a Residential Specialty Contractor or Residential General Contractor license, with the bond and insurance the CCB requires. You can look up any contractor’s CCB license, bond, insurance and complaint history online before you sign.

Across the river in Vancouver and Clark County, Washington, contractors must be registered with Washington L&I instead. If an installer works on both sides, ask for the license or registration that applies to your address.

Older homes, basements and downspouts

Portland has many older homes, from Craftsman bungalows and foursquares in the inner neighborhoods to mid-century ranches further out, and many have basements. For decades, some Portland downspouts were connected to the city’s combined sewer, and the city has run downspout disconnection efforts to reduce sewer overflows. If your downspouts go into the ground, ask whether they are connected to the sewer before changing anything, and follow current city guidance. Wherever water is discharged at the surface, it should flow away from the foundation and not toward a neighbor. See disconnecting downspouts.

Timing and the dry season

With almost no rain in July and August, summer is the natural time for gutter work in Portland. It is also when needles and seeds pile up unnoticed in dry gutters. A late-summer installation or cleaning, with guards added at the same time, means the system is clear when the first heavy rain arrives in October or November. Installers’ calendars fill quickly in September, so it pays to get quotes in early summer.

Choosing gutters and guards for a Portland home

• Micro-mesh guards for fir needles and moss: gutter guards.
• Seamless replacement for leaking sectional gutters: gutter replacement.
• Larger downspouts and a plan for where water goes: downspouts and drainage.
• Half-round gutters on older Craftsman and period homes: half-round vs. K-style.

Independent installers take calls from across the Portland area, including Portland, Beaverton, Hillsboro, Lake Oswego, Gresham, Fairview, Troutdale, Gladstone, Oregon City, Clackamas, Boring, Estacada, Canby, Molalla, Aurora, Hubbard, St. Helens, Rainier, Clatskanie and Vancouver, Washington.

Sources

• National Weather Service Portland: Climate book, Portland International Airport normals
• Oregon State University Extension: How to control roof moss and prevent long-term damage
• Angi: How much does gutter installation cost in Portland, OR?
• HomeGuide: Seamless gutters cost
• Angi: How much do gutter guards cost?
• Oregon Construction Contractors Board: license lookup (example gutter contractor records)
• Washington L&I: Register as a contractor