What's the most expensive room to renovate?

This probably comes as no surprise, but kitchens are by far one of the most expensive rooms in a home to remodel. Not only are plumbing and electrical jobs amazing, but installing, painting, or building new kitchen cabinets or islands is incredibly laborious and expensive. According to internal data from HomeAdvisor, these are the five most popular and expensive home improvement projects in the entire country, with the number one project being the most sought after.