I do not know if it is correct to use a hyphen between the words wrap, and around, in describing a porch that wraps around a house.
The adjective "wraparound" does not have a hyphen in Merriam-Webster's Dictionary, in case you're American, or Oxford English Dictionary (free citation through Lexico), in case you're British, those two tomes being generally accepted as the standard for AmE an BrE, respectively.
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Comments are not for extended discussion; this conversation has been moved to chat. – Kit Z. Fox♦ Sep 3 '19 at 18:41