  I review the Higgs sector of the $U(1)_{B-L}$ extension of the minimal
supersymmetric standard model (MSSM). I will show that the gauge kinetic mixing
plays a crucial role in the Higgs phenomenology. Two light bosons are present,
a MSSM-like one and a $B-L$-like one, that mix at one loop solely due to the
gauge mixing. After briefly looking at constraints from flavour observables,
new decay channels involving right-handed (s)neutrinos are presented. Finally,
it will be reviewed how model features pertaining to the gauge extension affect
the model phenomenology, concerning the existence of R-Parity-conserving minima
at loop level and the Higgs-to-diphoton coupling.
