Fill out an application, either at our office or online (under quick links above). In San Bernardino, since 2021, homeowners can add up to two extra units on their land with a singlefamily unit.Contact Leonard Buckner, Director Silvia Bernal, Secretary III Nancy Castaneda, Transfers. 700 North F Street San Bernardino, CA 92410. The Forest Service provides Special Use Authorizations for the private, non-exclusive use of National Forest land for a variety of reasons.