Too bad - I was thinking New York style, were presumably it could take a couple of minutes to get to the top.
For a 4 stories building, I would suggest taking the stairs. One more incentive to stay fit, so that you are not too out of breath to pitch while climbing the stairs.
Also, the elevator pitch isn't delivered on their turf, it's part of how you get to their turf.
For example, a good elevator pitch survives multiple rounds of "telephone"; it still makes sense when your uncle's cousin's barber tells it to a VC as he's making change.
