The transfer disclosure does not reach raw land
California's Transfer Disclosure Statement comes from Civil Code § 1102, and that article applies to transfers of real property improved with or consisting of not less than one nor more than four dwelling units. Vacant land sits outside it. Other duties do reach bare ground: Public Resources Code § 4136 requires a transferor of real property inside a state responsibility area to disclose that the parcel lies in a wildland area carrying substantial fire risk, on the conditions that section sets out. And a recorded Williamson Act contract binds whoever takes title regardless of what anyone discloses. California buyers order a natural hazard report anyway, so the information tends to surface with or without a statute forcing it.