I would go at least 25 deep though.
Garage door height for boat.
I store mine in a 12 x 30 garage with a 10 foot high door might be 11.
Too many things are taken into account.
But do not have to put the tower down and have plenty of room to walk around and even store stuff behind the boat.
Garage door for pontoon.
If your boat is above a certain height you need a permit to tow it.
I can do the reframing cheap and the doors installed are like 500 so it is cheap for ease of use for me.
S generically speaking a standard 9 wide 8 tall should do ya easily for most boats.
Unknown though go at least 7 2.
To cover all possible boats that you can tow without a permit than a garage of about 14 7 feet high would cover all the bases.
The majority of the garage plans with boat storage in this collection feature at least one bay that is 28 deep nicely handling a boat and trailer.
For example for a 11 6 boat on a trailer you might want to go with a garage door dimensions of 12 foot high and at least 10 foot in width.
How high is the trailer is the bimini top up or down etc you normally can get a few fractions of an inch if you need it by letting some air out of the trailer tires to get it in a bay.
Furthermore some boat storage garages even include an overhead door at the back of the boat storage bay.
Some of these designs offer taller ceilings and oversized garage doors for convenience.