Almost definitely puffballs, one of my favorite mushrooms to forage. Though I've never had ones this big and I hear they lose a bit of flavor if they're giant.
If you cut a *(vertical) cross section and it's a uniform texture with nothing that looks like the structure of a classic capped mushroom that should rule out any lookalikes. Should still be good if the inside is white and not starting to turn brown.
I also don't know if I'd eat mushrooms growing in or around an urban environment. Fungi are known to pull all sorts of contaminants from their substrate into their fruit bodies. Then again, we're already filled with contaminants from our food and water, so it may only be a drop in the bucket. 🤷♂️