Energy is one of the major drivers of a growing urban infrastructure development. The consumption of energy by different sectors of urban infrastructure are very high and the amount of energy produce is not enough to meet the huge demand of energy. According to several types of research, it is found that building sector is consuming about 40% of energy which is very significant. For heating and cooling of building sector 32% energy is used and its major impact is greenhouse gas emission. This study presents a simulation model that combines building properties and energy consumption of an existing commercial Building in Ahmedabad city (India). This research targets to study how to integrate active design strategies and energy-efficient building materials to improve the building performance and reduce energy consumption towards Net Zero Energy Building (NZEB). This research will suggest few changes in materials of building will be considered as retrofitting and it can lead to the concept of Net Zero Energy building (NZEB). For the analysis and simulation of energy, Design-Builder software is used.

Adoption of Building Information Modeling (BIM) in Facility Management (FM) is effective for integrating Architecture, Engineering, and Construction (AEC) for providing better services to the end-users of a project for a whole lifecycle. Real estate sector in India has witnessed high growth in recent times with the rise in demand for commercial as well as residential spaces. Most of them are facing issues related to AEC and are not been able to manage such on-site problems resulting in delaying of projects. It is better to develop proper coordination to provide integrated information about AEC in advance to reduce conflicts occurring during the construction and operational phase. The operational phase of a building is the main contributor to the building lifecycle cost and estimates show that the lifecycle cost is five to seven times higher than the initial investment costs and three times the construction cost. There is a lack of real-life case studies on BIM in FM especially for existing assets even though new constructions representing only 1-2 percent of the total building stock in a typical year. So a case study of a commercial project is taken for Facility Management using BIM as a tool and analyzed for probable solutions for mitigating AEC conflicts. The findings from the study demonstrate that BIM value in FM stems from improvement to current manual processes of information handover; improvement to the accuracy of FM data, to the accessibility of FM data and in work order execution ultimately improving the sustainability of building construction projects.