partitioning – Install 18.04 – / size of the house?

I have to reinstall 18.04 (due to ongoing issues) and I was wondering what was the best way to partition. I have a 1 TB HD. I want a separate /House directory so I was wondering what is the best way to take it to allow enough room for /start-up, /, etc.? Now my /House The directory is 173.8 GB. Can I let Ubuntu take care of other sizes when I get to the "Something else" screen?