According to Eschebach, on the right was the staircase to the upper floor, with a doorway to the latrine under the separate stairs at VII.4.54.
On the left was the Lararium. This is mentioned by Eschebach, but not by Fiorelli, or Boyce.
See Eschebach, L., 1993. Gebäudeverzeichnis und Stadtplan der antiken Stadt Pompeji. Köln: Böhlau. (p.282)
VII.4.53 Pompeii. May 2005. Latrine, accessible from doorway in VII.4.53, but under the stairs at VII.4.54.
Looking south.