This research aimed to develop a deterministic decision-making mechanism for locating the optimum set of retrofit options of current high-rise residential buildings in two completely different climatic zones of China. The retrofit options had been critically examined with completely different vitality saving targets primarily based on the native weather conditions, constructing options, and retrofit prices in chilly and extreme chilly zones comparatively. By making the intensive overview and analyzing appreciable statistics information and value data, internet current worth (NPV) technique was employed within the prototype constructing flats to develop this deterministic mannequin. The outcomes demonstrated that the heating system is a very powerful think about saving vitality and acquiring the optimum income in these two areas. The best optimum NPV will be obtained by reaching 60% vitality saving within the chilly zone, as vitality saving is round 319 kWh/m2/yr with the entire retrofit prices of USD $3560, whereas it’s 281 kWh/m2/yr with the entire retrofit prices of USD $3480 to attain the 50% energy-saving goal within the extreme chilly zone. Primarily based on the evaluation of vitality financial savings and retrofit prices, the outcomes will be successfully applied for the aim of making sustainable retrofits in current buildings, and the mannequin will be tailored for choosing applicable retrofit selections in different climatic zones.