Building garage need ideas

I am planing on building a garage this spring.

I have found out from the city i can build up to 475ft.sq
or if i choose to go bigger id have to apply.

I am looking for some ideas for what dimensions i should go for a garage 475 or slightly larger.

I would like to be able to keep two vehicles in their during the winter at times. (Dart and Ranger)

i also want to make sure i have enough room to work on the dart when needed, pulling the motor and such down the road..

Does anyone have any thoughts on what dimensions i should go with?
keep in mind ill also need room for work bench, tools cabinets and such.
Thanks