How Much Does a Roof Replacement Cost in Columbia County, Oregon?
Real 2026 numbers from a local roofing contractor — price per square, architectural shingles vs. metal, tear-off and sheathing, repairs, and moss. No “call for pricing” runaround.
- Licensed · Bonded · Insured
- Oregon CCB #256045
- Free Estimates
2026 Roof Replacement Prices for St Helens & Scappoose
Roofers price by the square — 100 square feet of roof surface. Most full replacements we do in Columbia County land in these ranges, and every one includes tear-off, disposal, underlayment, flashing, ventilation, shingles, and cleanup. Treat these as honest planning numbers, then get a free firm bid for your actual roof.
| Project | Typical Cost (2026) | What Moves the Number |
|---|---|---|
| Architectural shingle replacement | $450–$750 / square | Pitch, layers, sheathing condition, roofline complexity |
| Standing-seam metal roof | $1,000–$1,600 / square | Panel gauge & finish, trim details, penetrations |
| Second-layer tear-off | + $100–$150 / square | Extra labor and disposal weight |
| Sheathing replacement | $80–$140 / sheet (4×8) | Only what’s rotten — found during tear-off |
| Roof & leak repair | $400–$2,500 typical | Flashing, pipe boots, wind damage, valley leaks |
| Moss removal & treatment | $300–$800 | Roof size, how established the moss is |
| Chimney or skylight reflash | $500–$1,500 | Masonry condition, curb height, counterflashing |
Quick math: a single-story 1,500 sq ft home is usually 18–24 squares of roof, so roughly $9,000–$17,000 in architectural shingles. A two-story 2,200 sq ft home with a busier roofline runs about $13,000–$25,000. Metal roughly doubles those figures.
Why Two Similar Houses Can Be $7,000 Apart
Square footage is only the starting point. When we bid a roof in St Helens or Scappoose, these are the things that actually move the number:
- Pitch. A steep 8/12 or 10/12 roof needs staging, harness work, and slower installation. It also has more roof surface than the house footprint suggests.
- Layers. Two layers of old shingles means twice the tear-off labor and dump weight. Roofing over them is cheaper today and a leak factory later.
- Sheathing. Older homes near the river and up the hill often have soft plywood under the north slope. We price a sheathing allowance up front so there are no surprise change orders.
- Complexity. Valleys, dormers, chimneys, skylights, and wall tie-ins each need flashing and detail work. A simple gable roof is the cheapest roof to replace.
- Ventilation. Many Columbia County homes were built with almost no intake venting. Adding ridge and soffit vents costs a little now and adds years to the shingles.
- Permits & disposal. St Helens, Scappoose, and the county each handle reroof permits a little differently. We pull them and haul everything away.
The unglamorous parts — ice and water shield in the valleys, new step flashing, proper venting — are where cheap roofs fail in our climate. That’s the part of the bid worth paying for.
Where Your Money Actually Goes
The roof pictured here is a full tear-off and replacement with algae-resistant architectural shingles — the roof we install most in Columbia County. Expect 25–35 years here if it’s vented properly and the moss is kept in check.
Standing-seam metal flips the math: about double up front, then very little after. It sheds fir needles and moss instead of holding them, lasts 40–60 years, and handles wind off the Columbia well. Over the life of a home you plan to keep, the two often cost about the same per year. If you might sell in the next decade, shingles usually win.
Not sure? We’ll price your roof both ways in the same written bid so you can decide with real numbers instead of national averages.
Price My Roof Both WaysMore on materials and our process on the main St Helens roofing page — or the Scappoose roofing page if you’re across the hill. Replacing siding at the same time? See siding & exterior painting.
Signs It’s Time for a New Roof (and When It Isn’t)
Replace: 20+ years old
Most 3-tab roofs in Columbia County are done by year 20; architectural shingles by 25–30. Past that, repairs are money spent on borrowed time.
Replace: granules in the gutters
Bald shingles, curling edges, and gutters full of grit mean the shingles have lost their UV and water protection.
Replace: soft spots or daylight
A spongy feel underfoot or light through the attic sheathing means water has reached the deck. That needs tear-off, not a patch.
Repair: one leak, sound shingles
A leak at a pipe boot, chimney, or wall on an otherwise healthy roof is a $400–$1,500 fix, not a $15,000 problem.
Repair: wind-lifted shingles
After a Highway 30 windstorm, a few tabs lifted or missing on a roof under 15 years old is a straightforward repair, often insurance-covered.
Repair: moss, caught early
Moss lifts shingle edges and holds water. Cleaning and treatment before it’s established buys years. Once it’s rooted in, the damage is usually done.
How to Keep the Cost Down (Without a Roof That Leaks)
- Do it before it leaks. A roof replaced on schedule needs a few sheets of sheathing. One replaced two winters late needs rafters, insulation, and drywall too.
- Compare bids line by line. Tear-off, ice and water shield, flashing, ventilation, sheathing allowance, permit, warranty. The low total usually skipped one of them.
- Don’t over-spec the shingle. A mid-grade algae-resistant architectural shingle outlasts a premium 3-tab and costs less than designer lines that mostly add looks.
- Bundle the exterior. Gutters, fascia, and skylights are cheapest to replace while the roof is open and the crew is already on site.
- Check your insurance first. Storm damage is often covered. We document it and give the adjuster an itemized bid.
- Book the off-season. Summer slots fill first in Columbia County. Fall and spring replacements are easier to schedule, and we dry in before any rain.
Roofing Price Questions, Answered Straight
How much does a roof replacement cost per square around St Helens?
Architectural asphalt shingles typically run $450–$750 per square installed — the complete job: tear-off, disposal, synthetic underlayment, ice and water shield in the valleys, new flashing, ridge venting, shingles, and cleanup. Steep pitches, extra layers, rotten sheathing, and busy rooflines push toward the top of the range.
What does a 1,500 sq ft house cost to reroof?
A single-story 1,500 sq ft home usually has 18–24 squares of roof once pitch and overhangs are counted, so roughly $9,000–$17,000 in architectural shingles. A two-story 2,200 sq ft home with a more complex roof lands closer to $13,000–$25,000.
How much more is a metal roof?
Standing-seam metal runs about $1,000–$1,600 per square here — roughly double shingles. It lasts 40–60 years versus 25–35, and sheds moss and needles far better. On a long-term home the lifetime cost is close; on a house you’ll sell within ten years, shingles usually make more sense.
Is tear-off included in the price?
Yes — every Reno Masters replacement is a full tear-off so we can inspect and repair the sheathing. A second layer of old shingles adds about $100–$150 per square for the extra tear-off and disposal. Rotten sheathing runs about $80–$140 per 4×8 sheet, and we only replace what’s actually bad.
What does a roof repair cost instead?
Most targeted repairs — a leaking pipe boot, failed chimney or wall flashing, a patch of wind-lifted shingles — run $400–$2,500. Moss removal with a preventive treatment is typically $300–$800. If your shingles still have life, a repair is the honest answer and we’ll say so.
Will my homeowners insurance pay for it?
Insurance covers sudden damage — a windstorm, a fallen limb — not a roof that has simply worn out. If a storm damaged your roof, we photograph and document it, give the adjuster an itemized bid, and get the roof dried in while the claim moves. Age, moss damage, and neglected leaks are generally not covered.
Why are roofing quotes so different?
The low bid is usually leaving something out: no ice and water shield, reused flashing, roofing over the old layer, no permit, or a crew that isn’t licensed and insured in Oregon. Compare every bid line by line for tear-off, underlayment, flashing, ventilation, sheathing allowance, permit, and warranty before you compare totals. Our CCB number is #256045 — look it up.
Get a Firm Number for Your Roof
Tell us the age of the roof and what you’re seeing — we’ll walk it, check the attic, and put a real price on it. Free, written, no pressure.
Stop Guessing — Get a Real Number
A 20-minute roof and attic check beats any calculator. Free written bids for St Helens, Scappoose, and all of Columbia County.
Call 503-369-1287Prices reviewed: September 2026