Redlands occupies two campuses in Sydney: the Senior School campus, which houses students from Years 7 to 12 and the Junior School campus, which houses students from preschool to Year 6. In addition the school operates the High Country Campus in
Jindabyne.
Senior School The Senior School is located on Military Road, Cremorne. Peter J. Cornish, school principal from 1981 to 2002, created an association with the immediately adjacent Anglican parish of St Peter's, Cremorne. The school continues use of the parish church as the Secondary School chapel where school church services are regularly held. The Roseby Building serves as the science block, originally named the Wyndham building, and was refurbished in 2007. In 2010, the school completed the Redlands Fitness Centre. In 2010–11, a major development was undertaken on the Murdoch Street Campus as part of the Federal government BER program. In 2016, the school commenced a 20-year, $114 million redevelopment of the Senior Campus, with the central building being a four-story tall Learning Hub.
Junior School The Junior School campus includes the former
Cremorne Girls High School site on Murdoch Street, which it purchased from the
Government of New South Wales in 1989. This site houses the Preschool, Preparatory and Junior School students. Preparatory students have their classrooms in the Margaret Roberts Building, while Junior Students have classes in the Parks and Peter Cornish Buildings.Along with this, Redlands House Preschool has its own area in the southern area of the school, connected to the Robert Dunnet Hall, the sports and assembly hall. Transition Gold or Pre-Kindi is a program for kids enrolled in preschool a year young and it’s located in the Peter Cornish Building. The 1960s three-storey building was demolished to make way for the new home for the Margaret Roberts Preparatory School (K–2) and an all purpose sports and assembly hall. A playground, oval and courts were built. In 2024, Redlands announced a new System where the Junior School was from preschool-year 6. In 2025 when this started, Mr Micheal Quatch replaced the then head of prep school Ainslie Breckanridge and acting Junior School head, Ian Holden as their roles merged.
High Country Campus Redlands also owns a separate campus in Jindabyne. == House system ==