It's never too late to crate train as long as you do it the right way.
I have a hunch that a four year old Husky isn't going to take to a crate right away. Start him off in small doses of maybe fifteen minutes in the crate. Give him things to do (look up "bully sticks" on the web, they're relatively safe chews from what I've heard, fill Kongs with kibble, cover a Nylabone in peanut butter, etc) and do not make a big deal about putting him in there or taking him out. Graudally increase your time. Do not just jump into crate training by expecting him to stay for 9 hours by himself in the beginning.
If you want to wait on the crate, though, try a couple of other things first:
- Pet Deodorizer on the areas he goes. You can also get one of those "Pee Posts" that you put on your lawn that draw a dog to urinate on it due to phermones.
- Confining him to a smaller room, like a bathroom or laundry room, while you are not there
- Leaving less water throughout the day (obviously don't leave him for 9 hours with no water, but you could try leaving half the amount you normally do and also putting a few ice cubes in)
- Set feeding schedules with potty time outside directly after. Heavy praise for going outside.