To get a rough idea of how much coverage you need to rebuild your home after a fire or other loss, multiply the square footage of your home by $450. This gives you an approximate amount of dwelling coverage for your homeowners policy. Right now, it costs about $400 per square foot to rebuild an average home in California, and in Los Angeles County, that number is even higher. Using this calculation can help you decide if you’re comfortable with your policy coverage. At Hershfield, we use an industry-specific coverage calculator to determine your coverage.