[DIYguy]

Ours are examples of garages that are function over form (3 car attached, 3.5 car detached).
The ceiling in the detached garage is about 16 feet high to accommodate a 4 post lift (which I would love to have).
It is on my bucket list to install nice flooring in the attached garage like the beautiful examples that some of the other posts have shown.
But the detached garage is more of a workshop so a nice floor like that wouldn't survive for long there.
We built the detached garage ourselves with only the steel framing, shingles and concrete being contracted out.
The air compressor and noisier/dirtier power tools live in the detached garage.
Air and power lines run underground to the attached garage to keep most of the noise and dirt away.
100% LED lighting in both garages, which is both bright and efficient.