Overnight lodging for retreatants and mentors is provided in Marmion Hall, located directly across the street. The Dormitory has 2 sections: North and South. The South dorms are the regular accomodations for FBYC, featuring 20 rooms divided between two floors and accomodates around 40 people with Covid regulations. The rooms are furnished with bunk beds; and most with dressers and desks that include two drawers and a closet.

The North dorms are located on the second floor of Marmion Hall and have 24 bedrooms, restrooms, and three meeting areas. There are both double and single rooms available.  There are also three meeting rooms in this area, one of which has a kitchen.