Food for thought........you say "private school" but my first question would be is there any local, state or federal monies involved (financing, grants, loans etc.)? ADA Title II or UFAS may be applicable and might require an elevator.
1107.4 Accessible route. At least one accessible route shall connect accessible building or facility entrances with the primary entrance of each Accessible unit, Type A unit and Type B unit within the building or facility and with those exterior and interior spaces and facilities that serve the units.
Exceptions:
3. In Group R-2 facilities with Type A units complying with Section 1107.6.2.2.1, an accessible route is not required to connect stories or mezzanines where Type A units, all common use areas serving Type A units and all public use areas are on an accessible route.
4. In other than Group R-2 dormitory housing provided by places of education, in Group R-2 facilities with Accessible units complying with Section 1107.6.2.3.1, an accessible route is not required to connect stories or mezzanines where Accessible units, all common use areas serving Accessible units and all public use areas are on an accessible route.
Exception 3 deals with large apartment buildings or complexes (i.e., more than dwelling units), or convents and monasteries where Type A units are required. If the common use and public use spaces associated with the Type A units are on an accessible level, Section 1107.4 would not require an elevator between stories. Section 1107.7.1 would possibly allow for no elevator in the building for the upper floors.
Exception 4 is a similar idea to Exception 3, only dealing with Group R-2 larger congregate residences (i.e., more than 16 residents, per Section 310.4), such as sororities, fraternities and boarding houses where Accessible units are required. If the common use and public use spaces associated with the Accessible units are on an accessible level, Section 1107.4 would not require an elevator between stories. Section 1107.7.1 would possibly allow for no elevator
in the building for the upper floors.
When applying Exception 4 it is important to recognize that dormitories at colleges or boarding schools are excluded from this exception. Based upon the DOJ adoption of the 2010 ADA Standard, these facilities are required to provide elevators by federal law. The IBC is consistent with that intent, but it does not differentiate between public and private schools. Many colleges now provide “living communities,” or living arrangements for students with shared studies or interests, on different levels within dormitories. This accessible route requirement is intended to allow for full participation in all activities, as well as to visit or study with students on other levels in the dormitory.