Granite countertops are among the most popular countertops in kitchens today. The average cost to install granite countertops is between $3,100 and $4,500, depending on surface size and materials.Generally, granite is cut into long slabs, negating the need for seams and grout. Then it’s polished and sealed to protect against extreme heat, scratches and stains.orian. The cost to install corian countertops averages between $2,200 and $5,000, though prices will vary depending on a number of factors. Corian countertops are among the most popular solid surface cabinets available.