San Juan County offers an Owner Builder permit (for dwellings), and Owner Builder exemptions (for uninhabited structures). Adopted by SJCC under Chapter 15.04.540, these permits have restrictions on the permit requirements.
In essence, they are exempt from the structural parts of the current IRC/IBC codes and are only inspected for Mechanical, Plumbing, Energy code, life safety and fire requirements etc. See the code for the exact restrictions.
Be aware that only natural persons can apply, not corporations or LLCs. There are restrictions on how often you may use this permit type. There are also restrictions on recording notices to title which may affect future sales and financing of the property. Also, life safety inspections are required when the property is rented, or sold.