We propose a dynamical scoto-seesaw mechanism based on a non-sequential gauged B-L symmetry. Dark matter is reconciled with neutrino mass generation, in such a way that the atmospheric scale arises a la seesaw, while the solar scale is scotogenic, emerging radiatively from the exchange of “dark” states. Dark matter is made stable by a residual subgroup of the gauged B−L symmetry. The extended scalar and gauge sectors lead to rich phenomenology. In particular, we discuss sizeable charged lepton flavour violating (cLFV) phenomena, including Goldstone boson emission processes.