I recently got a bit spooked about all the sawdust in my 12x24 shed and decided to get a new shed 10x12 for storage and finishing. I paid to have the shed built, just too old for construction projects. Seems all the wood and panels have gotten heavier every year I get older. What is amazing is that my wife was all for it.
This time, however, I decided to finish the shed completely before moving in, so it is completely insulated, wired with 3 separate circuits, has an AC built in, added an extra window for more light, and today I'm putting in the last of the sheetrock. Found a great little radio remote control switch rated for 15 amps so I can turn on the heater from in the house so its warm before I walk out there in the winter cold.
I'm also putting in indoor/outdoor carpet for comfort. Wish I'd had the construction guys lay in insulation in the floor to cut down the chill from underneath, but will put a skirt around the bottom to trap the air inside. Might even pull some R30 glass insulation into the space to cut down the chill. Probably a good idea to put some foam under the carpet for a bit of added insulation.
Its so nice in there already that I've decided to also use it as an office space, particularly a get away for writing, which is a big part of my consulting work. I'm thinking of painting it a cheerful yellow inside, something pale like a Naples yellow.
I got a great 1600 lumen LED fixture in the center for light at night, the 3 windows make it pretty bright during the day. Small as the shed seems compared to the tool shed, it is still bigger than my home office, and I won't have to share the space as I do now.