PCA on office building shows weak categorize so if we have more directly related to energy consumption data the PCA result would be more hopeful and given a more meaning full result.
Multivariable model is also considered to build a model with the same variable. OLS function in statsmodel package is used to analyze the multivariable model. at the biginning, the number of floor, building age, occupancy, and floor area were selected to build the model. Each variable's P-value should be less than alpha, 0.05, and occupancy variable was dropped. The multivariable, model's R-square value for multifamily housing is 0.744 and office building is 0.832.
Result