You can reach the B&B:

By car, on a comfortable ferry-boat (there is a parking place free of charge near the B&B).
From Marco Polo’s Airport by the speedboat Alilaguna
From Railways Station St. Lucia by the speedboats lines 5.1 / 1 ACTV
From Bus Station Piazzale Roma by the speedboats lines 5.1 / 6 / 1 ACTV Official Web site of touristic guide of Venice Venezia Unica