When considering your garage door dimensions, there are some standard dimensions that are normally used, especially if you are ordering premade doors. You also need to take into consideration where you live and your local building codes. For example, in hurricane areas, you usually aren’t permitted to build a double car garage that is more than 16 feet wide.
Most garage doors are 7 feet high, allowing for plenty of room if you are driving a jeep, truck or mini van. Premade doors are all 7 feet high, so if you want a garage door that is higher, you will need to inquire about a custom built door.
Depending on how many cars you want your garage to hold, local building codes, and where you live; the width of your garage can vary greatly. The standard garage dimensions for width can be anywhere from 8 feet up to 18 feet. The standard for a double car garage is generally 16 feet, while 9 feet is the most common width for a single car garage.
It is recommended that the depth of your garage be at least 6.89 feet to allow for the garage door to open properly.
That should answer all your standard garage door dimension questions!