If it were me I'd put in a script that used the directory as a variable but tested the directory path to be sure it was in the user controlled directory. I'd then put both the mkdir and the chown in that script and tell sudo to access the script intead of the command.
Of course you should make sure the script you write only has permissions for root (since sudo will run it as root anyway).
Giving users "chown" is very dangerous (what if they make a file that contains "su -" then do "chown 4755" on the file. That would make the file a script that becomes the root user and allow anyone to execute it. Doing what I wrote above would minimize this.
I once worked at a place where the brain dead admin that worked on it gave users access to things like "sudo chown", "sudo vi" etc... I asked him why he didn't just remove the root password from the system since it would have the same effect.