Required lot sizes and setbacks vary depending on the zoning district of the property. First, you will need to determine the zoning district for the property in question (see item #5 in this FAQ). Next, you can locate requirements for the applicable zoning district in Article VII of the Linn County Unified Development Code.
A setback is defined by the Unified Development Code as “the minimum horizontal distance between a lot line and a building or structure located upon such lot required by the provisions of this chapter.” In order to know the distances from the proposed structure or addition to the lot lines, you will need to determine where the relevant property lines are located. If your property has been surveyed or is a platted lot, survey pins should be located at the corners of your property. If there are no property pins, or you are unsure of their location, these Tips for Locating Your Property Lines may be of assistance. There may also be easements located on the property that may have restrictions.