1. A computer-based method of generating an estimate for renovating a structure, the method comprising: obtaining an electronic image of a portion of the structure, wherein the electronic image includes an image of a placard having predetermined dimensions at a location proximate to the portion of the structure; displaying the electronic image on a display; determining the location of the placard within the electronic image; determining the dimensions of the image of the placard; calculating a scaling factor based on the dimensions of the image of the placard and the predetermined dimensions of the placard; receiving, from a user, at least two reference points in the electronic image and a measurement type; calculating a measurement of the received measurement type, using the at least two reference points and the calculated scaling factor; and generating an estimate for renovating the structure using the calculated measurement.