The length of time that it takes to make a piano depends upon the manufacturer. Each maker uses different techniques when making pianos, which can affect how long it takes to create one. Stuart & Sons is a manufacturer of pianos, and each piano takes over one year to make. These pianos are created by hand for quality. This length of time may vary by manufacturer, as some may take longer to make more detailed pianos, while others may make basic pianos that can be made in a shorter period of time.