Living in Florida, I never had a basement to practice in. Florida is too close to sea level for that.
I've practiced in carports, and garages though.
When I was a student sax player, we watched the house next door for the owners when they were up-north for 9 months of the year. The built the home, hopefully to retire in. My mom got sick of me practicing hours and hours, so she would send me next door. It wasn't bad, the house had good acoustics.