## 1 Introduction
\begin{table}
\begin{tabular}{c c} \hline \hline
**Countries** & **Codes** \\ \hline United States & Leadership in Energy and Environmental Design (LEED) \\ United Kingdom & Building Research Establishment Environmental \\  & Assessment Method (BREEAM) \\ Canada & Continental Automated Building Construction (CABA) \\ Hong Kong & Building Environmental Assessment Method (BEAM) \\ Australia & National Australian Built Environment Rating System (NABERS) \\ Singapore & Green Mark for Buildings (GMB) \\ China & Shanghai Construction Council \\ Netherland & Environmental Performance Express of Buildings \\ Germany & German Green Building Council \\  & Comprehensive Assessment System for Building Environmental \\ Japan & Efficiency (CASBEE) \\ Spain & VERDA Green Building System \\ Korea & Assessment Standards for Certifying Intelligent Buildings (ASCIB) \\ Pakistan & Building Energy Code \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Green building codes developed in different countries. on factors that contribute to global climate change, which enhance human health, and protect water and material resources. There are four possible levels of LEED certification: Certified (40-49 points), Silver (50-59 points), Gold (60-79 points), and Platinum (80 points and above). The Initial design for a green building requires the introduction of a better ventilation system. In this regard, [PERSON] [10] has carried out extensive research on the size, position, and orientation of windows for achieving a green building. Sixty-five various cases were developed using Revit by changing their window sizes, window positions, and building orientations, and which conducted energy calculations on Green Building Studio. Test results showed that the window size has a significant impact on the energy load. Furthermore, the most efficient position of windows was in the middle of a wall. [PERSON] [13] used a BIM-based methodology to perform energy simulations. The traditional process of performing building simulations was compared, and an analysis was carried out using the Lawrence Berkeley National Laboratory (LBNL) methodology [13]. The LBNL methodology was used to semiautomate building energy performance (BEP) simulations. The EnergyPlus software (Orlando, FL, USA) was used to perform the energy simulations. The preparation of input files for building design showed dramatic (70-80%) savings in time compared to the traditional process of preparing the same input files. [PERSON] [14] studied the relationship between the BIM and LEED rating processes. He studied the case of a business school building located on Salisbury University's campus in Salisbury. A virtual environment (VE) was used for the sustainability analysis of the building. He concluded that the software could handle the US-LEED certification effectively. [PERSON] [15] utilized EnergyPlus for a simulation tool to evaluate the performance of a building. A three-dimensional model was created in the Revit program and which exported the gbmxl file to the ECOECT software. From ECOTECT, the file was further exported to the EnergyPlus software in the IDF format. The building's window sizes were altered and the orientation of the building was changed. He automated the process and concluded that the self-activating energy simulation analysis can be very helpful to save time. [PERSON] [16] carried out a study on a residential building with a floor area of 220 m\({}^{2}\). The house was a single story with a basement. The overhangs were provided for the building's windows. The windows were also glazed to avoid heat transfer. Various case scenarios were created. The simulations were studied and the conductivity of the floor, roof, and walls were checked. He concluded that the simulation tools utilized earlier in the project could help to understand the building performance so that the alterations for the design can be carried out for the project in the preconstruction phase. The final design demonstrated an energy-efficient building with recoverable costs.