The answer to 'underlayment installation cost local' is that the cost of underlayment installation can vary significantly depending on your local market, the size and complexity of your roof, and the specific materials and labor required. Typically, homeowners can expect to pay anywhere from $1 to $5 per square foot for underlayment installation, with the higher end of that range for more premium materials or complex roof designs.
Several factors that can influence the cost include the type of underlayment (e.g. synthetic vs. felt), the slope and pitch of your roof, accessibility, and the experience and labor rates of the roofing contractor. It's essential to get multiple local quotes to understand the typical pricing in your area.