Can you access the house sign? Are you on a custom plot? If so - open up the menu and go to the custom tab. Do not actually enter the house customization mode. Look down the options and find the one to change the foundation. Select it and then pick the same foundation that you currently have. Confirm the pick. This acts as a "reset button" for many house functions.
If you can not access the house sign - or are not on a custom plot - then I can't think of anything more to do. Hope this works for you.