A couple of years ago, after I retired, I moved to my home town and started remodeling the house I lived in until I was 13. It's an old (over 100 years) farm house and had been a rental since my grandma died in 1976. The inside was trashed.
I gutted the bathroom and kitchen. I moved a staircase from the bedroom into the entry room and enlarged the downstairs bedroom, including adding two closets. I added a storage/coat closet under the stairs.