The cost of a granite countertop varies depending on its color, pattern, complexity of fabrication and installation. As of January 2015, modular granite countertops average $25 per square foot, while slab granite countertops cost around $60 per square foot when installed.
Slab granite is the most expensive granite countertop option because its requires installation by a professional. Transporting the custom-fabricated heavy slabs is costly, which adds to the price. The main advantage of installing a slab granite countertop is the near-seamless finish, which provides an easy-to-clean surface for food preparation.
Modular granite countertops come in cut slabs, weighing 50 pounds on average, which makes them easier to handle and transport. There are configuration options for sinks, backsplashes and edge pieces, minimizing the need for custom fabrication. The installation for a modular granite countertop can be a do-it-yourself project, which goes a long way toward reducing overall expenses.