Junior boarders, aged 9 to 13 (Years 5, 6, 7 & 8), have their own recently refurbished House in the Main School.  Each boarder has her own desk with overhead bunk and shares her room with two or three other girls.  The house has two common rooms with TVs and table-tennis facilities, a kitchen, an Arts and Crafts Room with a networked computer and printer, plenty of books and daily newspaper and a garden equipped for summer games. 

Two resident Housemistresses, a non-resident Housemistress and a GAP student care for the younger girls.  Home-made cakes after school are followed by activities, supper, an hour's supervised Prep, and a swim or sporting activity before bed.  Accompanied visits to town and making hot drinks and snacks in the House kitchen are other highlights of the younger boarders' routine.  School House has its own Behaviour Policy based on rewarding good behaviour.  Merit Award Points are given, and can be exchanged for a variety of treats.

The transition from Junior to Senior House is eased by the links existing between the Houses.  Matron and the GAPs work between the houses to provide continuity from School House to Twiston Davies. Meals are taken together in the School Dining Room.  Sixth Form prefects are attached to School House and regularly spend time there.  Swimming and other suitable evening and weekend activities are open to girls of both Houses.  Boys from Chapel House, the junior boarding house of Monmouth School, are invited to share some of the activities. The opinions of girls in School House are important and they send representatives to the Boarding and Food Forum.

The girls are set a competition each holiday, to be judged by a guest adjudicator when they return.  The event is also accompanied by an evening of fancy dress to match the competition theme.  Recent occasions have featured spectacular Easter bonnets, and, for Halloween, ghoulish costumes and some amazing carved pumpkins.