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1 Professionally built and installed concrete countertops cost $70-$100 per square foot, or $2,100-$3,000 for a typical 30 square foot kitchen counter.
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. No-stain slab granite countertops cost $50-$90 per square foot, or $1,500-$2,700 for an average kitchen, typically including professional installation.