The average lifespan of a garage door is around 10-15 years. However, this can vary depending on the type of garage door, the material it is made out of, how often it is used and how well it is maintained. For example, a wooden garage door will typically not last as long as a steel one. Similarly, a garage door that is used multiple times per day will not last as long as one that is only used occasionally. Finally, a garage door that is properly maintained (e.g., regularly lubricated and cleaned) will usually last longer than one that is neglected.