Quick and Dirty Rehab Analysis Finding Measurments

Hey everyone! I'm doing a quick analysis on a property that's distressed and needs to be rehabbed. Its long distance located in Galion Ohio. The property is 1.856 sq. ft. I'm trying to find the linear footage of the Soffit and Fascia. I cant think of another way to find the measurements for this and any other parts of the property without asking my agent. I'm pretty sure investors aren't asking their agent for all measurements for all the pieces that need work right? How do you find the measurement's to know how much product you need to order? Is their some sort of rule that I should use with the sq. footage of the property? Are the measurement's not as important as I'm making it seem? This is only for a quick and dirty analysis to see if I should even consider the property. Any help is appreciated.