Its unclear how many of those units would turn into long term rentals.  In in SF at least, I&#x27;m guessing well under half.  Many, some, most? of the units are part timed occupied by the landlord.  The commercial properties (run by businesses) account for about 1&#x2F;3 of the listings.  How many of those units would turn into long term rentals?<p>It can take over a year and cost tens of thousands of dollars to evict a tenant. Throw in rent control and you have a market where it is often more attractive to not rent your vacant unit - particularly if you want to move into the unit or sell it within the decade.<p>All in all, I would estimate that airbnb siphons up around 1% of the units away from long term rentals.