If you're researching the cost of a new roof in Harford County, Maryland, you're probably trying to answer one simple question: how much should a roof replacement actually cost? Roof prices can vary depending on several factors, but getting a ballpark roof estimate is easier than most homeowners think. A qualified roofer can often estimate the price of a roof replacement just by knowing the square footage of the roof. Roof Replacement Project - In Progress - JP Construction S