A process for producing liquid hydrocarbon products comprising: a) hydropyrolyzing a biomass-containing feedstock in a hydropyrolysis reactor vessel comprising hydrogen and a deoxygenating catalyst and operating at a hydrogen partial pressure from 7 barg (102 psig) to 55 barg (798 psig), producing a hydropyrolysis reactor output comprising at least one non-condensable gas, a partially deoxygenated hydropyrolysis product and char particles; b) hydroconverting at least a portion of the partially deoxygenated hydropyrolysis product in a hydroconversion reaction zone comprising at least one hydroconversion reactor vessel containing a hydroconversion catalyst, producing a hydroconversion reactor output; and c) recovering a substantially fully deoxygenated hydrocarbon liquid and a gaseous mixture from the hydroconversion reactor output, said substantially fully deoxygenated hydrocarbon liquid having a total oxygen content of less than 2% by weight, wherein a property of the substantially fully deoxygenated hydrocarbon liquid is enhanced by virtue of co-processing, as a separate feedstock, an oxygenated plastic in the hydropyrolysis reactor vessel, wherein the oxygenated plastic is an aliphatic hydrocarbon precursor or an aromatic hydrocarbon precursor, and wherein a feed rate of the aliphatic hydrocarbon precursor is adjusted in response to a measured, or desired change in a, yield or cetane number of a diesel boiling range fraction of the substantially fully deoxygenated hydrocarbon liquid, or wherein a feed rate of the aromatic hydrocarbon precursor is adjusted in response to a measured, or desired change in a, yield or octane number of a gasoline boiling range fraction of the substantially fully deoxygenated hydrocarbon liquid. a) hydropyrolyzing a biomass-containing feedstock in a hydropyrolysis reactor vessel comprising hydrogen and a deoxygenating catalyst and operating at a hydrogen partial pressure from 7 barg (102 psig) to 55 barg (798 psig), producing a hydropyrolysis reactor output comprising at least one non-condensable gas, a partially deoxygenated hydropyrolysis product and char particles; b) hydroconverting at least a portion of the partially deoxygenated hydropyrolysis product in a hydroconversion reaction zone comprising at least one hydroconversion reactor vessel containing a hydroconversion catalyst, producing a hydroconversion reactor output; and c) recovering a substantially fully deoxygenated hydrocarbon liquid and a gaseous mixture from the hydroconversion reactor output, said substantially fully deoxygenated hydrocarbon liquid having a total oxygen content of less than 2% by weight, wherein a property of the substantially fully deoxygenated hydrocarbon liquid is enhanced by virtue of co-processing, as a separate feedstock, an oxygenated plastic in the hydropyrolysis reactor vessel, wherein the oxygenated plastic is an aliphatic hydrocarbon precursor or an aromatic hydrocarbon precursor, and wherein a feed rate of the aliphatic hydrocarbon precursor is adjusted in response to a measured, or desired change in a, yield or cetane number of a diesel boiling range fraction of the substantially fully deoxygenated hydrocarbon liquid, or wherein a feed rate of the aromatic hydrocarbon precursor is adjusted in response to a measured, or desired change in a, yield or octane number of a gasoline boiling range fraction of the substantially fully deoxygenated hydrocarbon liquid.