St. Andrews is the centrepiece of The Halls and is the name by which many people refer to the whole complex of buildings. It has a fine, high-beamed ceiling, beautiful stained glass windows, limestone columns and a large polished maple floor. It was originally the nave of the friary and was completed in 1449. The size and beauty of its proportions are impressive without elaborate decoration, in keeping with the friars' rule of simplicity. The stained glass, stone carving and deeply-coloured portraits add richness to the simple backdrop of the building, adding a contemporary feel to this impressive historic building - the best of both worlds.

The hall has traditionally been used for a multitude of functions from royal banquets to international table tennis. It is regularly used for classical music concerts and during the annual Norfolk and Norwich Festival it hosts performances by jazz, pop, and folk artists from all over the world. It is popular for banquets and dinners, conferences, fairs, and exhibitions such as Art Fair East.

When used for a concert, St Andrews is an impressive auditorium, with choir galleries, a large extendable stage, and a stunning Victorian concert organ. There is also a Steinway grand piano which is available for hire.

The West Gallery tiered seating accommodates up to 185 people and provides a fabulous view of proceedings either directed at the permanent stage for central arena events. Main access is through the porch door and is flat and accessible but it is also integrated with the facilities of adjoining hall spaces.