The foundation stone for the present school building was laid by the then Chief Minister of West Bengal, Dr. B.C. Roy on December 9, 1957 and in March 1960; the senior school was transferred to the present building at 78, Syed Amir Ali Avenue.

The school had efficient Headmistresses all along. Mrs. Clarke was followed by Mrs Robeiro during the early 60’s, followed by Mrs. Pastakia from 1963-65. Mrs I.L. Wilson de Roze was Headmistress for the longest period, from 1965-2000. The present Principal, Mrs. D. Kar, joined in April, 2000.

In the academic field MHS created history in 1968 when Malabika Chakravarty - a Humanities student, broke all records and stood first among all the groups in the Higher Secondary Exams. Throughout, girls in different batches have secured ranks in the Secondary and Higher Secondary Examinations.

In 1985, 'Maitree', the inter-school fest organized by classes XI and XII, was held for the first time at the Ice Skating Rink. In March 1987, the foundation stone for the Science Hall with the Planetarium was laid. Computer classes started in the Science Hall from February 1988, after its inauguration. Modern High School celebrated its Golden Jubilee in 2002.

The school is affiliated to the CISCE. Students appear for ICSE and ISC examinations at the end of class X and XII respectively.