cost to install mantel
1 Installation for the mantel can cost anywhere from $200 to $1,000 depending on the contractor. 2  Mantels are recommended to be installed by a professional because of the complexity of the installation process.3  Plain wooden mantels need to be painted over for an additional layer of texture.he price of mantels greatly varies depending on the design as well as the size of the mantel itself. 1  On average, a fireplace mantel can cost $300 to as much as $11,500 or more. 2  A higher end mantel, such as a marble fireplace mantel that has a traditional Italian design, can cost anywhere from $9,000 to $11,500.