Originally Posted by Ray@Autogeek
design for smart tool/product storage, as well as above :
Also, design for clearance to work around. Keep in mind the various sizes of vehicles that you may be working on.
If it is in the cards, try for a 10' or 12' ceiling. This will allow for clearance to work above the largest of vehicles without worrying about any hanging light fixtures, fans, garage door openers/tracks, etc..- roofs are painted, and as mike says "if it has paint, gets polished".
Trench drain along door inside with sloped garage floor to drain - coated floor with gritted surface - this will allow for indoor washing or water runoff from weather.
Dedicated air conditioning for your climate.
You'll need an air compressor (if not in hand already) - it is a wish list of mine to run permanent air lines around the perimeter of the garage with multiple drops to connnect tools
Another personal wish list item is an Indoor hose bib with filtration system is nice, as well as utility sink w/ hot and cold taps. maybe a dedicated washer/dryer per Paul Mitchell above
Gallon or 5 quart liquid storage with taps for large volume of products.