"This house is mine."

Translation: यह मकान मेरा है।

[Adam711804]

what happened to "ghar"? I thought that meant house/home. When did it change to "makaan"?

[RanzoG]

Both words mean house.
ghar means both house and (in the more abstract sense) home.
makaan suggests a building/structure specifically.
A rabbit can go into it's ghar, but the the rabbit's ghar is probably not a makaan.

makaan, by the way, is of Arabic origin whereas ghar is Indic.

[FalenePierce]

The problem is at this point we have only learned ghar. There were 5 new words in the list. This sentence doesn't belong in this lesson.