India, Sept. 6 -- Mumbai real estate market's skyline continues to build upwards, a question that is rarely part of the conversation around new luxury towers is beginning to attract attention is what happens to these buildings after 30 years? A discussion on Reddit's Indian real estate forum has sparked a debate around the long-term maintenance, repair costs and eventual redevelopment of high-rise residential buildings in Mumbai.

The concern is particularly relevant for a city where high-rise living involves complex common infrastructure, including lifts, fire-safety systems, water pumps, electrical installations, facades, plumbing networks and parking structures.

Unlike an individual house, maintaining a large residential tower require...