If you are widening the door because of a new vehicle widen the door to the equivalent of two additional feet per side of vehicle.
Making garage door wider.
Wall extensions because garage doors are usually sized to snugly fit the dimensions of the garage itself making the door larger usually means making the garage larger.
Here you should have the correct dimensions of your garage.
Step 1 remove the existing door from the frame by unscrewing the screws on the hinges and lifting the door away.
Include motion sensor lighting with the garage door opener as well as on other lights in the garage.
On the non hinge side there may be a bevel which should be removed prior to gluing additional stock.
One way to do it would be to get wall extensions for the entire the garage and then cut the roof of the garage off lifting it up to the height you want it.
Make sure you leave an inch to make the aligned properly.
For example eight feet tall with 4 feet wide are the best solution for one swing door.
If the door is 7 tall frame the opening 7 1 5.
You can start to buy materials after making the plans such as proper lumbers rails and other carpenter stuff.
Skylights can provide additional day lighting as a safety factor.
Frame the rough opening to a height that is 1 5 taller than the door that you have selected.
Use a black marker to mark the new location for the side of the doorway along the interior of the existing wall.
If you are installing a 9 wide door the opening will be 9 3 wide.
To make a door frame wider the do it yourself should also ensure that the planned construction does not cut into any existing electrical or heating and air conditioning equipment.
Install an electric overhead garage door opener with a remote control located at an accessible height for a seated person.
You re like going to need to remove 1 4 on the hinge side prior to gluing the additional stock.