Whenever the necessity appears of if to make as many residential changes how much commercial changes the people tend to be a little apreensivas, therefore when an appropriate company is not contracted the migraine almost that is guaranteed. Therefore we go to cite some good tips of as to choose an able company. First it is very important to know as they are the ways of work of this company, for example, to know if the employees of the company who will carry through its changes qualified and they are trained for some types of situation. In some changes (sobrados building and generally), it has necessity to be effected hoistings of furniture or glasses, in this in case that it is of maximum importance to know if the equipment used for the company is of quality, so that thus any type of accident can be prevented, either with the furniture and glasses that is with the professionals who are working. It also has situations where some furniture must be kept by the company, in this case the company must offer service of Guard mobile where these furniture had been stored. To know Guarda mobile before contracting the company is crucial, therefore thus any type of undesirable surprise is prevented. It always verifies as they are the installations, if it has humidity or infiltrations beyond conferring as the storage is made. Following the majority of what it was cited in this article, it has possibility of its changes to be a true success.