The question likely means a 4000 square foot house, not a 4000 dollar house. For a 4000 square foot house, typically two-story, the actual roof area is much larger than the footprint due to pitch, overhangs, and complexity, often ranging from 2,200 to 3,000 square feet or 22 to 30 squares. For a complete tear-off and replacement with standard architectural asphalt shingles, costs generally range from 15,000 to 30,000 dollars for a simple roof design, and 25,000 to 45,000 dollars for a complex roof with steep pitch, multiple valleys, dormers, and high-end materials. Economy 3-tab shingles would be at the lower end, while premium Class 4 impact resistant shingles, designer shingles, or brands like GAF, Owens Corning Duration, or Atlas Pinnacle Pristine would be at the higher end. These prices include tear-off, disposal, synthetic underlayment, ice and water shield, flashing, ridge vent, and ridge cap. Additional factors that increase cost include replacing rotted plywood decking at 50 to 100 dollars per sheet, upgrading to better ventilation, steep pitch requiring extra safety equipment, multiple stories, and regional labor rates which are higher in coastal and metropolitan areas. For accurate pricing, get multiple detailed written estimates that specify material brands and warranty coverage.
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