Yes! Collect the geometry for the walls and floors into components or groups and then put a tag on the component or group. So you would draw the bottom floor, select that geometry and create a component/group for it. Then you would draw the first floor walls, select them and create another component/group. Repeat for the next floor and then the next floor’s walls. Each of those components or groups then get a tag.
Tagging the geometry as you did creates all sort of problems. Don’t go there.
I would suggest that you start over on your house model. Draw the bottom floor of the house and give it some thickness before creating the component or group containing the geometry. Don’t include the exterior paving with the interior floor.
A couple of other suggestions:
Don’t add materials until you have the geometry at least nearly complete. Make sure all of the faces are correctly oriented before you start adding materials.
Don’t get ahead of yourself with the entourage–furniture, plants, etc. Make sure your building is complete before you start moving in and doing the landscaping. Although that stuff is fun to see, it really loads the model and makes it more difficult to work in it.