Home Improvement
Cost to Replace Roof on a 1,800 Sq Ft House — 2026 Prices
Replacing the roof on a 1,800 sq ft house costs $9,000–$15,500 for architectural asphalt shingles in 2026. Metal roofing runs $18,000–$34,000. Here's the complete breakdown by material, pitch, and what contractors often leave out of their quotes.
1,800 Sq Ft Roof — Quick Answer
$12,000
National Average
20–22
Roofing Squares
1–2 days
Install Time
$9K–$15.5K
Arch. Asphalt Range
Roof Replacement Cost by Material — 1,800 Sq Ft House
All prices include tear-off of one existing layer, underlayment, materials, installation labor, flashing, and disposal. A 1,800 sq ft home has approximately 2,000–2,200 sq ft of actual roof area (20–22 squares) at standard pitch.
| Material | Total Cost | Per Sq Ft | Lifespan |
|---|---|---|---|
| Asphalt 3-Tab | $7,800–$12,000 | $3.90–$6.10 | 20–25 yrs |
| Architectural Asphalt Most Popular | $9,000–$15,500 | $4.50–$7.80 | 25–30 yrs |
| Impact-Resistant Asphalt | $10,500–$18,500 | $5.30–$9.30 | 30+ yrs |
| Steel/Aluminum Panels | $18,000–$27,000 | $9.10–$13.60 | 40–60 yrs |
| Standing Seam Metal | $22,000–$34,000 | $11.10–$17.20 | 50+ yrs |
| Concrete Tile | $20,000–$34,000 | $10.10–$17.20 | 40–50 yrs |
| Clay Tile | $26,000–$46,000 | $13.10–$23.20 | 50–100 yrs |
| Natural Slate | $36,000–$72,000 | $18.20–$36.40 | 75–150 yrs |
Cost by Pitch — 1,800 Sq Ft Home
| Pitch | Roof Area | Squares | Arch. Asphalt | Metal |
|---|---|---|---|---|
| Low (2:12–4:12) | 1,890–2,020 sqft | 19–21 | $9,000–$13,000 | $17,000–$26,000 |
| Medium (5:12–7:12) | 2,020–2,200 sqft | 21–22 | $10,000–$15,500 | $19,000–$30,000 |
| Steep (8:12–10:12) | 2,200–2,480 sqft | 22–25 | $12,000–$18,500 | $22,000–$35,000 |
| Very Steep (12:12+) | 2,480–2,800 sqft | 25–28 | $14,000–$22,000 | $26,000–$41,000 |
Frequently Asked Questions
A 1,800 sq ft home has approximately 20–22 roofing squares of actual roof area (1,980–2,200 sq ft including pitch and overhangs). Architectural asphalt shingles — the most popular roofing material — cost $9,000–$15,500 installed in 2026, with $12,000 being a realistic mid-point. Metal roofing on this size home runs $18,000–$34,000. Concrete tile costs $20,000–$34,000. Natural slate runs $36,000–$72,000. All prices include tear-off, underlayment, materials, labor, and disposal.
A 1,800 sq ft home typically has 20–22 roofing squares (2,000–2,200 sq ft of roof area) at a standard 4:12–6:12 pitch. Steeper pitches increase the square count significantly — a 9:12 pitch on a 1,800 sq ft home can push the roof area to 2,400–2,600 sq ft (24–26 squares). Since contractors price by the square, a steep pitch can add 15–25% to your total cost compared to a low-pitch version of the same house.
A 1,800 sq ft home is slightly below the national average size (the median U.S. home is about 2,100 sq ft), so your roof replacement cost will be slightly below the nationally cited averages. The 'national average' roof replacement cost of $11,000–$15,000 is based on approximately a 2,000 sq ft home. A 1,800 sq ft home at the same pitch and material will run about 8–12% less — roughly $9,000–$15,500 vs. $9,800–$17,500.
Ask these 8 questions: (1) Is the quote all-inclusive — does it include tear-off, underlayment, ice and water shield, flashing, ridge cap, and permit? (2) How many layers are you tearing off? (3) What happens if you find rotted decking? (4) What brand and product line of shingles are you using? (5) What's the labor warranty (typically 1–5 years, separate from material warranty)? (6) Are you a licensed and insured contractor in this state? (7) Will you pull the permit, or am I responsible? (8) What's the payment schedule — avoid any contractor requiring full payment upfront.
Yes — two-story homes typically add 10–15% to roofing costs due to increased safety equipment requirements (taller scaffolding, safety harnesses, longer material lifts), slower installation pace, and higher insurance risk for contractors. For a 1,800 sq ft two-story home with architectural asphalt, budget $10,000–$18,000 vs. $9,000–$15,500 for a single-story home of the same footprint. The roof area is the same regardless of stories — it's purely the labor premium for working at height.
Compare: Roof Cost by Home Size
| Home Size | Arch. Asphalt | Metal |
|---|---|---|
| 1,000 sq ft | $5,000–$8,500 | $10,000–$17,000 |
| 1,200 sq ft | $5,900–$10,000 | $12,000–$20,000 |
| 1,500 sq ft | $7,500–$13,000 | $15,000–$25,000 |
| 1,800 sq ft ← this page | $9,000–$15,500 | $18,000–$30,000 |
| 2,000 sq ft | $9,800–$17,500 | $20,000–$33,000 |
| 2,500 sq ft | $12,500–$22,000 | $25,000–$42,000 |
| 3,000 sq ft | $15,000–$26,000 | $30,000–$50,000 |
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