Basic
$3.81 – $7.62 per sq ft
Base sheet plus two fiberglass ply felts mopped in hot asphalt (3-ply), flood coat with embedded gravel, existing edge reused
How Much Does Tar And Gravel Roof Cost in Portland, Oregon?
Built-up (tar and gravel) roof: multiple plies of asphalt felt mopped with hot asphalt and topped with gravel on a flat or low-slope roof, per square foot of roof.
Tar And Gravel Roof in Portland, Oregon typically costs $4.48 to $8.96 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Tar And Gravel Roof in Portland, Oregon
$4.48 – $8.96
per sq ftPrices in Portland are 15.0% higher than the national average for tar and gravel roof.
National average: $4 – $8 per sq ft
What you get at each price level
Standard
$4.48 – $8.96 per sq ft
Base sheet plus three fiberglass ply felts in hot asphalt (4-ply), flood coat with embedded gravel, new gravel-stop edge metal
Premium
$5.60 – $11 per sq ft
Heavier base sheet plus three ply felts (4-ply), extra-heavy flood coat and gravel, new gravel stop, stripped-in flashings at curbs
Cost Breakdown in Portland
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $1.88 – $3.78 | sq ft |
| Labor | labor | $1.76 – $3.50 | sq ft |
| Supplies & Other | supplies | $0.50 – $1.01 | sq ft |
| Equipment & Disposal | equipment | $0.34 – $0.67 | sq ft |
Prices adjusted for Portland local market conditions.
Cost Factors in Portland, Oregon
What Affects Pricing
- Materials ($1.79-$3.60 per square foot)
- Labor ($1.41-$2.80 per square foot)
- Supplies & Other ($0.48-$0.96 per square foot)
- Equipment & Disposal ($0.32-$0.64 per square foot)
Local Price Adjustments
Material costs5.0% above avg
Labor costs25.0% above avg
Labor costs in Portland run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
References
- Monarch Roofing: Things to know about a tar and gravel roof, monarchroofing.biz, retrieved Nov 2026
- The Roofing Brief: Flat roof types 2026, theroofingbrief.com, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Portland
Connect with local tar and gravel roof contractors in Portland for personalized quotes based on your specific project.