I’ve touched on this in the past, but a common question amongst prospective home gym owners is how much space they need. More is obviously better, but… What’s the minimum size for a home gym?
The short answer is 10 x 10 feet as a bare minimum. But that’s going to be really tight, especially in terms of width, and I would suggest a bit more. This is especially true if you want to do Olympic lifts.
The slightly longer answer is that a standard Olympic barbell is 7.2 feet long, and the typical diy weightlifting platform is 8 x 8 feet. While you don’t actually need a platform, this gives you a starting point in terms of size.
An 8 x 8 platform is gives you enough space to do the major lifts as long as you have enough space to work around the ends of the barbell. By expanding this to 10 feet, you should be able to slip past the sleeves, load/unload plates, and lift without fear of hitting the wall.
Related: Best Cheap Barbell
As for depth, a standard rack like the Rogue R-3 or the Titan T-3 would fit just fine in 8 x 8 feet of space with room behind it for a spotter and room out front for deadlifting. But you’ll probably want a bit of breathing (and storage) space.
Here again, 10 feet would be the minimum.
That being said, if you want a larger rack, you’ll need more space. I have Rogue bolt-together R-3 with 30-inch depth vs. the standard 24-inch depth. This probably isn’t a huge deal, but if you go for something like a Rogue R-6 or a Titan T-6 (with extra uprights), you’ll need more space.
Realistically, I wouldn’t recommend anything less than 12 x 12 feet. That way you’ll have ~2.5 feet on each end of the bar, and a bit more depth for storage, lifts outside of the rack, etc.