Asphalt Paving in Portland, OR

Asphalt paving in Portland is a water problem first and a pavement problem second. Portland International Airport averages about 37 inches of precipitation a year and downtown about 44, and nearly all of it falls from fall through spring: November, December and January each bring roughly 5 to 6 inches at the airport, while July and August get about half an inch apiece. A driveway or lot that drains well and sits on a solid, compacted base handles that easily for decades. One laid thin over soft, wet ground starts to rut, crack and pothole within a few winters.

Why Portland driveways fail

Most failures we see trace back to water. Rain gets into open cracks, soaks the stone base and the soil under it, and the weakened base lets the asphalt flex under every car. That flexing turns single cracks into the web-like alligator pattern, then into potholes. Low spots hold puddles that keep the base wet for weeks. Edges with nothing beside them to hold them up break off into the lawn. Moss and fir needles that sit on shaded asphalt keep it damp even longer.

The fix is not thicker asphalt on top of the same problem. It is a base built to carry load when wet, a surface shaped to move water off, and cracks sealed before the rainy season so water cannot get in. Cost guides describe a typical residential driveway as 2 to 3 inches of compacted asphalt over 6 to 8 inches of compacted gravel, and 3 to 4 inches over 8 to 10 inches of base for heavier vehicles. Your quote says which section we are building and why.

East side, West Hills and the edges of town

Portland is not one kind of ground. The east side is mostly a flat street grid of older homes, many with narrow driveways and aprons that cross a planting strip and sidewalk. The Tualatin Mountains, known locally as the West Hills, rise in the northwest and southwest, and driveways there are often steep, curved and shaded by firs, which makes drainage and traction the main design questions. Out toward Southeast Portland and Happy Valley, the Boring Lava Field's cinder cones, Mount Tabor among them, put plenty of homes on sloped lots too. Farther out, long gravel driveways and private lanes are common, and many owners want them paved.

Timing around the rain

Hot-mix asphalt has to be placed on a dry base and compacted while it is still hot, and sealcoat needs dry pavement and temperatures of roughly 50 to 95 degrees to cure. Portland's dry season runs roughly from mid-June to early September, and the shoulders of spring and fall often give dry stretches too. We book new paving and sealcoating for those windows. Pothole and crack repairs can be done more of the year when the weather allows, and getting cracks sealed before November is one of the cheapest ways to protect a driveway.

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Permits where the driveway meets the street

The City of Portland says installing or changing a driveway always requires a permit, even on an alley or gravel street. Work in the public right-of-way, usually the apron crossing the sidewalk, needs a Minor Improvement Permit or a Public Works Permit, and work on private property can need a separate building permit, with separate inspections for each. City rules in PCC 17.28.110 and TRN-10.40 set limits such as one driveway per lot in single-dwelling zones and a driveway width of 9 to 12 feet for a single-width parking area. If the driveway meets an ODOT highway, a county road or a Gresham street, that agency has its own process. We confirm which applies at the estimate.

Locates before digging

Oregon rules require anyone excavating to notify the Oregon Utility Notification Center at least two full business days before digging. Grading and base work count, so we request locates through Oregon 811 before any machine touches the ground.

What a new driveway job includes

• Measuring, checking slope and drainage, and noting the street connection
• Removing old asphalt, concrete or worn-out gravel
• Digging out soft or organic soil and replacing it with compacted stone
• Grading and compacting the base to the depth in your quote
• Placing and rolling hot-mix asphalt to the stated compacted thickness
• Tapering edges and transitions at the garage, walks and apron
• Care instructions for the first season and a sealcoat timeline

We are based in Portland and work across the metro area on the Oregon side of the Columbia. East of the city, Gresham and Happy Valley mix established neighborhoods with newer subdivisions climbing the slopes. To the west, Beaverton and Hillsboro in Washington County have large planned neighborhoods, business parks and plenty of commercial lots. South along I-5 and the Willamette, Tigard, Tualatin, Lake Oswego, Milwaukie and Oregon City bring hillside homes, older river towns and busy retail centers. Driveways connecting to state highways or county roads go through ODOT or the county, and Gresham handles its own right-of-way, so the permit path depends on the address. Each town page below covers what is particular to that community.