During the two hundred years of its existence, Raj Bhavan, Kolkata, has experienced additions and alterations in its internal decorations, lighting, furniture and fixtures, landscaping of the lawns and gardens as well as alterations to the suites to make the stay of the guests comfortable.  Although no significant alteration to the structure of the main building has ever been attempted, continuous civil maintenance of the entire structure, carried out by the Raj Bhavan wing of the Public Works Department of the State Government, has helped in retaining the grandeur of this heritage building.

Extensive renovation and restoration of the Raj Bhavan was carried out over the last few years during the incumbency of Shri Viren J. Shah. 

While executing the repairs and renovation works, visual and functional aesthetics, in line with the heritage structure, were essentially kept in mind.  Today, the Kolkata Raj Bhavan can boast of being not only the largest Raj Bhavan in the country but one of the most carefully maintained ones.