[EC900]

Always take time to plan for the future with new build, where stuff goes and where new stuff can be stored. Electrical plan for power and maybe a mini split one day.

I now have a small attached garage and none of the below luxuries, a bad back and inability to perform most arduous tasks of years gone by. But these were on a wish list item when home searching - space for cars with all doors opened.
Opted for nice house big lot small brick garage that
I reconfigured my tiny 1-car garage several times to accommodate growing needs. Overhead space is obstructed by low overhead door opener - that limits height with a QJack for me.

Tall overhead doors that will allow a pickup trunk I have - always a plus, not much $ if you have tall walls ceiling.
Plan on storage options too either on walls or floor and how the depth affects car door opening.
Floor roller jacking accessibility too, will handle get full reach.
Doing a new floor? Go thicker reinforced slab AND insulated vapor barrier, maybe get specs for a 2-post where to add more strength if there’s space and need for this sort.

There may come a time when lugging Quick Jack, around once or twice a month becomes a drudgery.
For that I’d only consider add a cutout recess - but plan on measurements for various or future car/truck/suv configurations… a good reason for no floor cut out and portability of moveable QJs.

Do use a box fan floor level year around and have some exhaust and ventilation.
Don't hose down a garage floor, especially one that doesn’t have a vapor barrier under the slab, you never want lingering or added moisture. Concrete is a sponge, draws up ground moisture and holds leaks and puddles.
A Floor fan is cheap to run 24/7 and will dissipate floor and undercarriage water.
If there’s a vapor barrier or sorts under the slab, maybe consider $$ epoxy coating. Even a painted floor will clean up well but has drawbacks like flaking from poor contact and moisture also hot tire separation, scratches, chips and eventually repainting.
My 2˘ - Good luck ! Post your progress and final build !