i am not at my home . why we use home in this sentense . why we not use house.

house is a house which is owned by us otherwise home is a home where we can live

''House''means grouped family some times taken. ''Home'' means it's treated with singular form.

HOME IS A PLACE WHERE WE LIVE. IF WE LIKE OUR RESIDENT BUILDING THEN WE WILL CALL "HOME' . OTHERWISE IT IS CALLED AS HOUSE