Metal patio covers can cost a few hundred dollars or several thousand dollars, depending on the size and complexity of the cover. Generally, the more metal you use, the more expensive the cover will be. Some companies will also charge extra for features like gutters and downspouts. If you're looking to install a metal patio cover yourself, be sure to factor in the cost of materials and tools. You may also need to hire a contractor if you're not comfortable doing the work yourself.