1 Slab granite countertops--solid pieces of granite custom cut to the width and shape of a countertop -- cost $60-$100 per square foot depending on the color and rarity of the granite, the style of edging. 2  Expect to pay $1,800-$3,000 for a typical kitchen, installed. Granite-cutting circular saw blades cost about $20; granite-cutting drill bits cost about $10. 2  Most granite countertops require frequent resealing treatments to avoid damage to the surface. 3  Sealant costs $15-$20 per ounce; one ounce treats 50 square feet of countertop.