STR loophole for multi family properties

[Ryan J.]

I purchased a 4plex earlier this year and 1 of the units is used as an Airbnb. Where in the tax code can we get more info about using the STR loophole in this example?

[Michael Plaks]

Quote from @Ryan J.:

I purchased a 4plex earlier this year and 1 of the units is used as an Airbnb. Where in the tax code can we get more info about using the STR loophole in this example?

You can look at Section 469 and Regulations 1.469 but you won't find clear answers there. Or anywhere, for that matter. 

Tax professionals do not have a consensus on whether you can claim the STR loophole benefits on only one out of 4 units.