  We have explored an extended seesaw model accommodating a keV sterile
neutrino adopting $U(1)_{B-L}$ symmetry. This model provides a natural platform
for achieving resonant leptogenesis to account for the observed baryon
asymmetry of the Universe. The required lepton asymmetry is sourced by the CP
violating decay of the lightest heavy right handed neutrino to Standard Model
leptons and Higgs. The presence of the light sterile neutrino in the model
brings out an enhancement in the final lepton asymmetry through an additional
self-energy contribution. Adopting a proper treatment for all the washout
processes this framework strictly favors a strong washout regime thereby
protecting the low energy neutrino mass parameters in agreement with the
present neutrino and cosmology data. This framework of extended seesaw scheme
offers the source of matter-antimatter asymmetry without any severe fine tuning
of the Yukawa couplings governing the tiny neutrino mass. We also comment on
the half-life period for the neutrino less double beta decay process in the
background of having a keV sterile neutrino satisfying all the constraints
which guide the explanation for the observed baryon asymmetry of the Universe.
