Just starting my workshop (one-car brick garage, insulated it ovedr the last year, put MVHR ventilation and very simple electrical batten heater - small and ambient). The vent and heating keeps it relatively warm (10-15C) and dry (50%-65%) even in winter and also cool in summer.
However, I have not yet built any tool shelves and not so many drawers chests. Luckily, while doing the garage -workshop conversion I build a lot of shelves in my house's loft and that is where I store majority of tools, equipment. The loft is not insulated and cold, but I store them in tool boxes (mostly power tools). Batteries I store in the house (in the kitchen). So the workshop is only used for work and for the tools I need for a particular stage of a project I am working. E.g. if I need a router - I go to the house loft. It is a fair bit of leg exercise, and I hated that initially, but now I got used to it and I see it as good for my health)). For heavy tools - I've got an electrical winch in the loft - comes really useful for big boxes.
Natural question - what does the wife say? - Well - I sort of gave her the living room, to her complete and full hobby pursuits. Only come there by invite)). She turns a bling eye on me dragging my tools form the loft, temp storing them in the kitchen and making usual mess of dirt and dust on my boots while I am doing it. And I don't care what kittens, pillows, yoga mats, candles, and all those blablabla happens in the living room.
Back to the workshop - so only for work, not for storage. I do though store some small items like screwdrivers, pliers, etc - that I use almost always. Still, the one-car garage is not big and is fully loaded with machines. I envy those guys with two car garages, but for me, to be able to do some decent size of a project requires constant offloading stuff to the loft. I also use loft for wood and small sheet material storage. Again - carrying wood to and fro is not the cleanest exercise, so you might have to consider a wife-deal.
Now, as I am finishing with the workshop set up, I am starting to build some drawers and thinking how I can put stuff on the workshop walls. Though I am not sure the walls will hold it, and those are plasterboard on battens. So not so much hope in carrying a lot of weight. But also, if I put a lot of stuff on the walls, that will eat up space, so still thinking.
Ah, heating and insulation is mostly for the sake of - sound proofing (not to disturb the neighbors) and for machinery (cast iron, etc) - they are heavy and very expensive to move and to deal with.
