Portland, ME · 2026 cost guide
How much does a new roof cost in Portland?
In Portland, a new roof costs about $9,800–$23,000 in 2026 for a 1,800 sq ft (about 20-square) asphalt-shingle roof, tear-off included — roughly $486.72–$1135.68 per square (100 sq ft). That’s about 4% above the Maine average.
Estimate your Portland project with the Roofing Square Calculator →
Portland cost breakdown
| Portland typical range | $9,800–$23,000 |
| Portland per square (100 sq ft) | $486.72–$1135.68 |
| Maine state average | $9,400–$22,000 |
| Versus Maine average | about 4% above average |
What’s different about Portland
Portland is Maine's largest market with the highest cost of living, where deep snow, ice dams, and coastal salt air drive durable exterior detailing.
- Snow load and ice dams call for ice-and-water shield and sturdier decking, pushing roof cost up.
- Coastal salt favors corrosion-resistant flashing and fasteners.
How the cost is built
Roof cost scales with roof area (measured in 100 sq ft 'squares'), pitch, and material — asphalt shingles are the budget choice, while metal, tile, and slate run two to four times more. Steep or complex rooflines, multiple layers to tear off, and new decking or flashing all add to the total.
Frequently asked questions
How much does a new roof cost in Portland?
In Portland, a new roof costs about $9,800 to $23,000 in 2026 for a 1,800 sq ft (about 20-square) asphalt-shingle roof, tear-off included — roughly 486.72–1135.68 per square (100 sq ft). That's about 4% above the Maine average, reflecting local labor and permit costs.
What affects the cost of a new roof in Portland?
Portland is Maine's largest market with the highest cost of living, where deep snow, ice dams, and coastal salt air drive durable exterior detailing. Snow load and ice dams call for ice-and-water shield and sturdier decking, pushing roof cost up.
How can I get an accurate roof replacement estimate in Portland?
Use the free Roofing Square Calculator to plug in your real measurements, then collect two or three local Portland quotes to compare. Prices vary by neighborhood, access, and project complexity.
Roof replacement cost in other Maine metros
Keep planning
Related calculators
Estimate roof replacement cost and what a storm-damage insurance claim is likely to net after depreciation and deductible.
Open calculator →ConstructionGutter CalculatorEstimate total gutter run, downspouts, hangers, and 10-ft sections from your footprint and roof style.
Open calculator →ConstructionSiding CalculatorEstimate wall area, siding squares, and boxes to order from footprint, stories, gables, and openings.
Open calculator →The Portland figure scales the Maine cost range by a local metro index, then adjusts for the city’s labor market and climate. A 2026 planning estimate, not a quote — get local bids. See our methodology.