Washington · Metal roof cost, 2026
Metal roof cost in Washington (2026)
On 155 Interlock® aluminum roofs we contracted in Oregon and Washington from 2024 to 2026, the middle half came to $38,400 to $64,800, a median of $47,300. By roof area that is $15.72 to $21.14 per square foot ($1,572 to $2,114 per roofing square). These figures are a rough guide only. Every roof is priced individually, and structural conditions or other factors at your home can move the number up or down. An in-home roof consultation is the only way to get accurate, factual pricing for your home or structure.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026
Median contract
$47,300
155 Oregon and Washington jobs, 2024 to 2026. Rough guide only.
Per square foot
$15.72 to $21.14
Middle half of jobs ($1,572 to $2,114 per square). Rough guide only.
Median roof
About 2,800 sq ft
28 roofing squares.
What Pacific Northwest homeowners paid
These are the contract prices on the 155 Interlock® roofs we contracted in Oregon and Washington from 2024 to 2026, taken from our own job book: 77 in Oregon and 78 in Washington. We use only 2024 to 2026 contracts, so the figures reflect current costs rather than older prices adjusted by an estimate, and we report Oregon and Washington together as one Pacific Northwest figure; each state's own median is in the table for reference. The middle half of jobs came to $15.72 to $21.14 per square foot ($1,572 to $2,114 per roofing square of 100 sq ft) of roof area, with a median of $18.53 per square foot ($1,853 per square). Whole-roof contracts in the middle half ran from $38,400 to $64,800.
Please read this before you use these numbers: These figures are a rough guide only. Every roof is priced individually, and structural conditions or other factors at your home can move the number up or down. An in-home roof consultation is the only way to get accurate, factual pricing for your home or structure.
| Per square foot of roof (per roofing square) | Whole roof | |
|---|---|---|
| Middle half of jobs | $15.72 to $21.14 per sq ft ($1,572 to $2,114 per square) | $38,400 to $64,800 |
| Median job | $18.53 per sq ft ($1,853 per square) | $47,300 |
| Most jobs (10th to 90th percentile) | $14.15 to $25.60 per sq ft ($1,415 to $2,560 per square) | — |
| Slate profile (92 jobs) | $15.13 to $20.26 per sq ft, median $17.69 (median $1,769 per square) | — |
| Cedar Shingle profile (28 jobs) | $16.48 to $20.27 per sq ft, median $17.67 (median $1,767 per square) | — |
| Shake profile (17 jobs) | $18.07 to $22.28 per sq ft, median $20.22 (median $2,022 per square) | — |
| For reference: Oregon jobs only (77) | Median $18.29 per sq ft ($1,829 per square); middle half $15.16 to $20.28 | — |
| For reference: Washington jobs only (78) | Median $18.65 per sq ft ($1,865 per square); middle half $16.22 to $21.89 | — |
| For comparison: 2023 jobs (88) | Median $17.75 per sq ft ($1,775 per square), about 4% below 2024 to 2026 | — |
Source: Interlock Metal Roofing (PNW) Inc. job book, 155 Pacific Northwest contracts (Oregon 77, Washington 78), 2024 to 2026, contract price as signed in US dollars; profile rows count only jobs in that profile, and the single-state rows are shown for reference. A roofing square is 100 sq ft of roof area. The median roof was about 2,800 sq ft (28 squares); the middle half ran from 2,100 to 3,600 sq ft. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home. You get a written price after your roof consultation.
Roofs behind these numbers
Recent Interlock® roofs in Washington. Tap a roof to see all of its photos.
What moves the price on a roof in Washington
Roof area
The biggest single factor: the more square feet of roof, the more material and labor.
Pitch, dormers and chimneys
Steep Craftsman and Tudor roofs, dormers, valleys, skylights and chimneys each add flashing and time. A plain gable on a rambler costs less per square foot than a cut-up roof. Every Interlock profile needs a minimum 3/12 slope.
What comes off, and what's underneath
Cedar shakes and shingles, concrete tile and natural slate always come off, and so do two or more layers of asphalt. A single layer of asphalt can be roofed over only if the inspection finds it suitable. Years of moss and a long wet season can leave soft or rotted decking under an old roof; deck repairs the inspection finds go into the written price.
Height, access and lot
Two- and three-story houses, steep hillside lots around Puget Sound, tight city lots and shared driveways need more staging, more setup and more care moving material, and that shows up in the price.
Coastal, island and exposed sites
Shoreline houses on Puget Sound, Hood Canal and the coast take wind and salt air, and island jobs on Whidbey, Camano and Vashon add transport and logistics. We plan the details for the exposure at your consultation.
Historic districts and permits
In a historic district, a landmarks review can affect the profile and color you choose and the timing; check with your local historic landmarks commission before you sign. Building permit requirements and fees are set by each city or county.
The wet season
Rain from fall through spring affects when a roof can be opened up and how fast it goes. We talk through timing with you at the consultation.
Profile and options
Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam and solid copper are priced differently. The Class A Fire Rated Available assembly (two layers of GAF VersaShield® over 15/32-inch plywood), underlayment upgrades, snow guards and gutters are line items.
What the price includes
- The Interlock® aluminum roof, made in North America by Interlock Roofing, installed by our own company, Interlock Metal Roofing (PNW) Inc., in business since 1997.
- The Guardian Lifetime Limited Material Warranty from the manufacturer: material and finish, for as long as the original purchaser owns the home, transferable once. Workmanship is not part of it.
- Our 10 Year Limited Labor Warranty covers the installation (see the labor warranty page for its terms).
- Wind resistance warranted to 120 mph when installed to manufacturer specification.
- A written price after your roof consultation: what the inspection finds goes into it before you sign.
Comparing it with steel and asphalt
Aluminum costs more than steel or asphalt up front. The fair comparison is over the years you'll own the home: an asphalt roof lasts about 20 years on published averages and is then torn off and replaced, while an Interlock roof is built to be the last one. Get every quote in writing and compare them over the same period.
If you'd like to spread the cost, financing is available from 9.99% APR on approved credit; the terms are on our roof financing page.
Questions, answered
How much does a metal roof cost in Washington?
For an Interlock® aluminum roof, the middle half of our 155 Pacific Northwest contracts (Oregon 77, Washington 78) from 2024 to 2026 came to $38,400 to $64,800, with a median of $47,300. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home. Your own price depends on area, pitch, what comes off, access and the profile; you get it in writing after a free roof consultation.
How much does a metal roof cost per square foot in Washington?
On our Pacific Northwest jobs from 2024 to 2026, the middle half came to $15.72 to $21.14 per square foot ($1,572 to $2,114 per roofing square of 100 sq ft), with a median of $18.53 per square foot. On the 78 Washington jobs alone, shown for reference, the median was $18.65 per square foot. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home.
What does a slate-style metal roof cost?
Slate is our most popular profile. On 92 Pacific Northwest Slate jobs from 2024 to 2026, the middle half came to $15.13 to $20.26 per square foot ($1,513 to $2,026 per square), median $17.69. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home.
What does it cost to replace a cedar shake roof with metal?
On 17 Shake-profile jobs from 2024 to 2026, the middle half came to $18.07 to $22.28 per square foot, median $20.22; on 28 Cedar Shingle jobs, $16.48 to $20.27, median $17.67. The cedar always comes off first, and that is in the written price. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home.
Have metal roof prices gone up?
On our own Pacific Northwest jobs, the median price per roofing square rose from $1,775 in 2023 to $1,853 in 2024 to 2026, about 4%. The figures on this page are from 2024 to 2026 contracts only. A rough guide only: prices vary job to job with structural and other conditions, and a roof consultation is required for accurate pricing for your home.
Do these prices include sales tax?
They are contract totals as signed, and our job book doesn't record taxes separately. Your written price after the roof consultation shows exactly what is included.
Why is aluminum more expensive than steel?
Aluminum costs more as a metal, and an Interlock roof uses interlocking panels with concealed fasteners rather than exposed screws. What you get for it is a roof that doesn't rust, which matters in salt air, and a Guardian Lifetime Limited Material Warranty.
Is the roof consultation free?
Yes. The consultation, at your home or on Zoom to start, and the written price are free and without obligation. Call (206) 589-8423.
Sources
- National Association of Home Builders / Bank of America Home Equity: Study of Life Expectancy of Home Components (February 2007)
- Guardian Lifetime Limited Material Warranty (full document, PDF)
- 10 Year Limited Labor Warranty, Interlock Metal Roofing (PNW) Inc.
Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 7, 2026.
Book your roof consultation for an accurate price.
A written price after your roof consultation, at your home or on Zoom. Interlock Metal Roofing (PNW) Inc. · 5608 17th Ave NW, Suite 1574, Seattle, WA 98107-5232 · 2219 Rimland Dr, Suite 301, Bellingham, WA 98226-8660 · 26910 92nd Ave NW, Suite 425, Stanwood, WA 98292
