cost to asphalt roofing
1 Architectural asphalt roof shingles cost, on average, cost around 20 to 40 percent more than 3-Tab shingles, or $2.50 to $5.00 per square foot installed ($3,750 to $7,500). 2  High end architectural shingles, however, could run as much as $6 to $8 per square foot installed ($9,000 to $12,000). 3-Tab asphalt shingles cost $1.50 to $3.50 per square foot. 2  For an average-sized (1,500 square foot roof), the total cost might be $2,250 to $5,250.