Roof Cost Estimator: What a New Roof Really Costs in 2026

Roofing is priced in 'squares' — 100 square feet of roof surface — and the gap between a basic shingle job and a standing-seam metal roof is nearly 3x. In 2026, a full replacement on a typical 1,800 sq ft roof runs $8,500–$13,500 for architectural shingles and up to $34,500 for tile. This estimator guide shows where every dollar goes so a contractor's quote never surprises you.

2026 Roof Replacement Cost by Material

• 3-tab asphalt shingles: $3.90 per sq ft ($390/square) — 15–20 year life
• Architectural asphalt shingles: $4.75 per sq ft ($475/square) — 25–30 years, the US default
• Standing seam metal: $11.50 per sq ft ($1,150/square) — 40–70 years
• Clay or concrete tile: $12.50 per sq ft ($1,250/square) — 50+ years, common in the Southwest and Florida
• Cedar shake: $10.00 per sq ft ($1,000/square) — 30–40 years, check local fire codes
• Flat membrane (TPO/EPDM): $8.50 per sq ft ($850/square) — 20–30 years for low-slope sections

The Four Multipliers That Move the Price

1. Pitch: standard 4/12–7/12 adds ~12% to labor; steep 8/12+ adds ~25% because crews need harnesses, toe boards and slower production.
2. Stories: a second story adds ~8% for material handling and safety setup.
3. Tear-off: $1.25 per sq ft to strip and dispose of the old roof. An overlay saves it but voids most warranties and hides deck rot.
4. Underlayment and ice barrier: ~$0.45 per sq ft — synthetic underlayment plus ice-and-water shield at eaves and valleys, required by code in snow states.

Your roof area is not your floor area. A 1,500 sq ft ranch has roughly 1,950–2,100 sq ft of roof once pitch and overhangs are counted. Measure the roof, or your estimate is fiction.

A Worked Example: 1,800 Sq Ft Roof, Architectural Shingles

Material and install at standard pitch: about $9,600. Tear-off and disposal: $2,250. Underlayment and ice barrier: $810. Total: roughly $12,700 at national average labor — $7.05 per sq ft, or $705 per square. In a high-cost metro like San Francisco or New York, multiply by 1.3–1.4; in the Southeast or Midwest, 0.9 gets you close.

FAQs

How much does a new roof cost for a 1,500 sq ft house?

The roof surface is roughly 1,950–2,100 sq ft after pitch, so budget $10,500–$15,000 for architectural shingles installed, or $21,000–$28,000 for standing seam metal.

Is it cheaper to overlay a roof instead of tearing off?

About $1.25 per sq ft cheaper up front — roughly $2,250 on a typical roof — but overlays void many shingle warranties, add weight the framing wasn't designed for, and make the eventual tear-off cost double. Most roofers advise against it.

How long does a roof replacement take?

One to three days for asphalt shingles on an average home, weather permitting. Metal and tile run three to seven days, and steep or complex roofs add time.