Is a couple buys it's dream Home grammatically correct?

Answer 1

No. "it's" is a contraction of "it is", so the sentence would read "A couple buys it is dream home."

Using the pronoun "its" means that the reader needs to work to find an interpretation. Perhaps a werewolf always wanted this cute little house in the woods, but a couple from New Jersey were shopping for a vacation home, and bought the house that the wolf ("it") had dreamed of having.

Or, maybe the sentence is a mistaken version of an intended "A couple buys their dream home," with "their" meaning "the couple's". "It" cannot refer back to "a couple", since "a couple" refers to people in this sentence.

Minor points: "a" should be capitalized since it begins the sentence, and "home" is not a proper noun and does not need to be capitalized.

Answer 2

No, the correct phrasing would be "A couple buys its dream home." "Its" should be used to show possession, rather than "it's," which is a contraction for "it is" or "it has."