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We compute the local rate of events similar to GRB 170817A, which has beenrecently found to be associated with a kilonova (KN) outburst. Our analysisfinds an observed rate of such events of R$_{KN}\sim 352^{+810}_{-281}$Gpc$^{-3}$yr$^{-1}$. After comparing at their face values this density of sGRBoutbursts with the much higher density of Binary Neutron Star (BNS) mergers of1540$^{+3200}_{-1220}$ Gpc$^{-3}$yr$^{-1}$, estimated by LIGO-Virgocollaboration, one can conclude, admittedly with large uncertainty that eitheronly a minor fraction of BNS mergers produces sGRB/KN events or the sGRBsassociated with BNS mergers are beamed and observable under viewing angles aslarge as $\theta$ $\leq$ $40^{\circ}$. Finally we provide preliminary estimatesof the number of sGRB/KN events detected by future surveys carried out withpresent/future ground-based/space facilities, such as LSST, VST, ZTF, SKA andTHESEUS.

GW170817: implications for the local kilonova rate and for surveys from ground-based facilities