Holy Infant Montessori Center

The Preschool Building houses the HIMC Covered Court, the whole Preschool Department, and two faculty rooms. It also has one canteen. It has two storeys. Rooms inside the buildings are called by the theme color of the classroom. This is the largest building of the HIMC so far, although has the least number of classrooms. The covered court is the venue for almost all programs and events of the school such as the weekly Flag Ceremony, the Quarterly Parents-Teachers Conference, Living Rosary, High School Year Level Days, Science Fair, Miting de Avances, PE Classes, Teachers' Day, Christmas Gift-giving Project (in cooperation with Mary Chiles Hospital and Carmencita Hernandez-Reyes Foundation), Commencement Exercises, CAT Battalion Formation, Baccalaureate Mass, and other academic and sports tournaments.

Senator Trillanes (in orange) awaits his turn to vote in the 2016 national elections at the Holy Infant Montessori Center.

The High School Building is a 2-storey building that houses the main canteen, the High School Faculty Room, the Copy Room, the SSG Headquarters, and classrooms serving the senior high and junior high departments. This also serves as the main polling precinct for Barangay BF Homes during national and local elections.

The Main Building is a 2-storey structure housing the Elementary Department, a canteen, two faculty rooms, the Computer and Internet Laboratory, the Administrative Offices, the Finance Office, the Registrar's Office, the Awards Hall, the Clinic, the Science Laboratory, the Home Economics Room, the Music Room, the AVR, the Library, a mini-shrine for the Holy Infant, the School Supplies and Uniform store and the classrooms for elementary department. Before it became an institutional facility, the Main Building used to be the house of the Reyes family, that until now, some parts of the older house are visible inside the Clinic and the Administrative Offices.

This seal of the Supreme Student Government was initially used for school year 2008–2009.

The Supreme Student Government (SSG) is the student council of the school, responsible for representing student concerns to the administrative body, and tasked to organize and manage several student-initiated events in the school, along with other interest clubs and organizations. Among many events, highlight events are the Buwan ng Wika during August when the Lakan at Lakambini pageant is annually held, and the Christmas Gift-giving Project in partnership with the Carmencita Hernandez-Reyes Foundation and Mary Chiles Hospital.

The HIMC SSG is among several private schools' student governments actively participating in the events of the Department of Education in the city, regional, and national chapter activity, including the Boys and Girls' Week of the City Government of Caloocan and the National Leadership Training for Student Government Officers of the Department of Education.

There are two autonomous SSGs: one for the high school and one for the elementary.

The Oracle is the campus paper established in 2006, under the tutelage of T. Christopher G. Mata, then Communications and Social Science faculty for junior and senior high school students. Its founding Editor-in-Chief is a woman, Vida Subingsubing, who ultimately attained a broadcast degree from UP Diliman. The first editorial staff consisted a majority of women, and with only 3 male staffers.

The Street Movers was founded in 2006 by longtime English faculty member T. Gilda Ortega, Jr., who was an alumna of the prestigious House of Dance Philippines. Initially specializing in hiphop, the group has flourished into a versatile dance company, performing and competing locally and nationally. The group is being trained by members of the internationally acclaimed dance group UPeepz and the prestigious House of Dance, Philippines.

The Fiat Club is a student organization focusing on organizing various activities and events for the total formation of Catholic Christian individuals. The organization is mostly composed of Catholic students and usually spearheads the spirituality and religious activities in partnership with the school administration and the Supreme Student Government. The name of the club was inspired by the biblical phrase in Latin Fiat Lux which means let there be light.

The HIMC Varsity Team consists of teams for basketball, volleyball, and cheerdance. The school mascot name is The Monarchs. The team consistently places and wins several championships of the Interschool Basketball-Volleyball League (ISBVL) of North Caloocan. The team is also an active participant of the NBA 3X Philippines and won the 18U division in 2018.[3] There were several proposals to rename the team, and among these proposals include: Royals, Regals, Trawlers, and Warriors - all alluding to the ministry of Jesus Christ as taught in the Bible and in Catholic tradition.