Pad, slab, structure, doors and power. Steel buildings set to the fabricator's anchor drawings rather than to the nearest inch, and pole buildings where that is the better answer for the ground and the budget.
In-floor heat if you plan to work out there in February, which in this valley you do. It goes in before the pour and it cannot be added afterwards without breaking concrete, so it is a decision worth making early.
Insulated, wired and finished to whatever level you actually need. A shop you work in is a different building from a shop you park in.
Structure
Steel, post-frame or stick built
Slab
Typically 5" to 6" with thickened edges under posts
In-floor heat
PEX in the slab. Decide before the pour.
Doors
Roll-up, sliders or overhead, sized to what you actually park
Where we do this work
Shops, Garages & Barns across the whole valley. If you are in one of these, Heath will come and look at it.