Cost to Replace Roof on a 1,800 Sq Ft House
Complete cost guide for replacing the roof on a 1,800 square foot home. Detailed itemized estimates for architectural shingles, metal, tile, tear-off disposal, and certified labor rates.
Material Cost Breakdown for a 1,800 Sq Ft House
Costs below reflect total installed replacement pricing for approximately 22 roofing squares (2,200 sloped sq ft), including certified labor, synthetic underlayment, drip edge, and standard waste factors.
| Roofing Material | Installed Cost / Sq | Total Installed Cost Range | Expected Lifespan | Manufacturer Warranty |
|---|---|---|---|---|
| 3-Tab Asphalt Shingles | $280 – $420 | $6,160 – $9,240 | 15–20 years | 20–25 years |
| Architectural (Dimensional) Shingles | $380 – $620 | $8,360 – $13,640 | 25–30 years | 30–50 years (Lifetime limited) |
| Luxury / Designer Asphalt Shingles | $650 – $1100 | $14,300 – $24,200 | 30–45 years | 50 years |
| Standing Seam Metal Roofing | $950 – $1650 | $20,900 – $36,300 | 50–70 years | 30–50 years |
| Corrugated / Exposed Fastener Metal | $520 – $880 | $11,440 – $19,360 | 30–45 years | 20–30 years |
| Concrete Tile | $850 – $1500 | $18,700 – $33,000 | 50+ years | 50 years |
| Spanish / Mission Clay Tile | $1200 – $2200 | $26,400 – $48,400 | 75–100 years | 50+ years |
| Natural Quarried Slate | $1800 – $3600 | $39,600 – $79,200 | 100+ years | 100 years |
| Cedar Wood Shakes | $980 – $1750 | $21,560 – $38,500 | 30–40 years | 25–30 years |
| TPO Single-Ply Membrane (Flat) | $620 – $1050 | $13,640 – $23,100 | 22–30 years | 20–30 years |
| EPDM Synthetic Rubber Membrane (Flat) | $580 – $980 | $12,760 – $21,560 | 25–35 years | 20–30 years |
Tear-Off, Disposal & Accessory Costs
Single-Layer Tear-Off
Stripping one layer of old asphalt shingles costs $880 – $1,650 ($40–$75 per square), including debris haul-away.
Double-Layer Tear-Off
Removing two existing layers costs $1,650 – $2,860 ($75–$130 per square) due to added dumpster tonnage and disposal fees.
Decking Replacement
Replacing rotted or damaged plywood/OSB decking costs $70 to $110 per 4×8 sheet installed. Most replacements discover 2 to 4 bad sheets requiring spot repair ($140–$440).
Underlayment & Flashing
A 1,800 sq ft home requires roughly 3 rolls of synthetic underlayment ($200–$350) and 27 pieces of metal drip edge ($150–$300).
1-Story Ranch vs. 2-Story Colonial Roof Area
The living space of a home does not automatically equal roof area. A 1-story 1,800 sq ft ranch spreads all living space across a single level, creating a massive 1,800 sq ft ground footprint requiring ~22 squares of roofing.
Conversely, a 2-story 1,800 sq ft colonial stacks living space over two floors, cutting the ground footprint in half (~900 sq ft). That 2-story home only requires roughly 12 squares of roofing, lowering overall replacement costs by nearly 40%—though steeper 2-story staging can slightly increase the per-square labor rate.
Calculate Your Exact Roof Dimensions & Materials
Do not rely solely on square footage estimates. Use our free engineering calculators to verify exact sloped square footage, shingle bundles, underlayment rolls, and nails:
Frequently Asked Questions: 1,800 Sq Ft Roof Replacement
How much does it cost to replace a roof on a 1,800 sq ft house?
Replacing the roof on a 1,800 sq ft house costs between $8,360 and $13,640 for standard architectural shingles, including tear-off, synthetic underlayment, and installation. Premium standing seam metal ranges from $20,900 to $36,300.
How many roofing squares are on a 1,800 sq ft house?
A single-story 1,800 sq ft home typically requires 22 roofing squares (about 2,200 square feet of actual sloped surface area). This accounts for eave overhangs (12 to 18 inches) and a standard 4/12 to 6/12 pitch slope multiplier.
How much is labor vs materials for a 1,800 sq ft roof?
According to Bureau of Labor Statistics (BLS OEWS 47-2181) contractor benchmarks, labor represents 50% to 60% of your total invoice ($3,960 to $7,040), while roofing materials account for the remaining 40% to 50%.
How long does it take to replace a 1,800 sq ft roof?
A professional roofing crew of 5 to 7 installers can typically tear off and replace a 1,800 sq ft residential roof in 1 to 2 days, assuming favorable dry weather and standard pitch accessibility.