Siding here does not fail dramatically. It goes soft at the bottom course, swells around a window, and holds paint for fewer years each cycle until someone pushes a thumb through it. If your exterior is at that stage, describe the house and licensed Hillsboro siding crews will send you real bids.
The cladding is the visible half. Underneath it sits the weather-resistive barrier, the flashing at every window head and sill, and the sheathing. On a wet-climate re-side, correcting bad window flashing and replacing damaged sheathing is where the durability comes from and where a chunk of the cost lives. A bid that only prices the material is not describing the job you actually need.
Fiber cement lap siding dominates re-siding around Hillsboro for good reasons: it holds paint far longer than the hardboard it usually replaces, it does not feed rot, and it looks correct on the traditional elevations common in local subdivisions. Vinyl costs less and never needs painting, which suits rentals and tight budgets. Engineered wood splits the difference. Each has a real case; be suspicious of a contractor who only ever installs one.
If failure is confined to a few areas — the north wall, a chimney chase, the bottom two courses along a bad grade line — targeted repair plus a quality repaint can buy eight to ten more years for a fraction of a full re-side. The judgment call is how widespread the moisture damage is. Ask for moisture readings at several elevations rather than a verdict from the driveway.
Describe the project once and we match it with vetted local pros who actually do this work — you choose who to hire, or nobody at all.
The Tualatin Valley delivers persistent rain from October into June — not violent storms, but constant damp that finds every unsealed joint. That is why butt joints, kick-out flashing at roof-wall intersections, and proper clearance above grade and roofing matter more here than in drier climates. Most siding failures in Hillsboro trace back to one of those three details rather than to the product itself.
Re-siding requires a permit from the City of Hillsboro Building Division, or Washington County outside the line, and the contractor must be CCB-registered. Many planned neighborhoods here also require written HOA approval of color and material before the first board comes off. Handle the HOA submittal early — it moves on its own schedule and has stalled more than one crew that was ready to start.
Mature shrubs planted right against the wall and bark dust piled above the siding's bottom edge are two of the most reliable causes of rot in local yards. Siding needs air and clearance to dry. A good contractor will tell you what has to be cut back or regraded before installation, and that conversation is a sign they intend the new siding to last.
Full replacement on a typical Hillsboro two-story commonly lands between $22,000 and $50,000. Vinyl usually runs $8 to $14 per square foot installed; fiber cement generally $12 to $22 including paint or factory finish; engineered wood sits between them. Rotten sheathing, window flashing corrections, and difficult access add to every one of those numbers, so expect a contingency line. Targeted rot repair with repaint is a far smaller project, frequently $3,000 to $9,000. A bid well below the band typically skips the weather barrier detailing, which is the part you cannot inspect later.
The old hardboard was crumbling under every window. They found bad flashing behind three of them and fixed it before the fiber cement went on.
I expected to be told I needed the whole house done. Instead they replaced the north wall and two chimney chases and repainted. Saved us a fortune.
Soil had been built up against the siding on two sides and that is exactly where the rot was. They corrected the grade, kept clearance at the bottom course, and had the fiber cement color approved with the HOA before ordering.
Press firmly at the bottom edges, around windows, and on the north side. Softness, swelling, or crumbling means moisture is already in the material and paint will not stop it. If the surface is sound and just chalky or faded, painting is the right and much cheaper answer.
For a long-term home in this climate, usually yes. It holds paint through many more wet seasons, resists impact, and looks closer to real wood on a traditional elevation. Vinyl is a reasonable choice for a rental or when the budget is genuinely fixed.
It is possible with some products but rarely wise here. Covering the old siding hides whatever moisture damage is behind it and skips the chance to correct the weather barrier and flashing. Almost every reputable local crew quotes a full tear-off.
Most single-family homes run two to four weeks, plus paint if the product is not pre-finished. Rain delays are normal from fall through spring because the wall cannot be left open, so summer scheduling is worth the wait.
Modestly on its own. The meaningful gains come from what a re-side makes accessible: air sealing the wall penetrations and adding continuous exterior insulation while the wall is open. If efficiency is a goal, ask for that as a priced option.
Send photos of the worst walls and the approximate age of the house. Licensed local siding contractors will respond with scopes, materials, and pricing at no cost.
Find Your Contractors Today100% free · No obligation · Takes about 2 minutes — only matched pros ever see your number