Thanks for reaching out the Community. Changing Home names isn't available. However, if you still want to change the name of your home structure, you can delete the home and create a new one. Here's how:
You can delete a home from the Home app if you’re the only home member.
If you aren’t the only member of a home, you first need to remove all other members from the home with the Google Home app. Otherwise, you can only remove yourself from the home, and the remaining home members still have access to the home and its devices.
When you delete a home:
To delete a home:
Hope this helps.