Everyday, private & public institutions relocate their facilities worldwide. While several reasons can lead a company to relocate its offices, this can negatively affect the entire daily mobility of the concerned employees. For the employees, the commuting distance, time and cost can change drastically which may affect stress level, productivity, absenteeism, etc. For companies, a modification of the commuting trips of their employees might lead to higher costs both monetary (parking & fleet management for instance) and environmentally (increased CO2 emissions). Our tool would allow private companies relocating as well as public institutions dealing with land use & economic development to forecast the monetary and environmental impact of a workplace relocation. This diagnosis & simulation tool might also be used as a decision support tool for selecting the most suited location where to relocate.