The room-temperature dependences of microhardness $H$, Seebeck coefficient $S$ and electrical conductivity $\sigma$ on the substitution of both the cast and hot pressed samples of PbSe$_{1–x}$Te$_x$ ($x$ = 0–0.045) solid solution are obtained. As established, all of samples have a $p$-type of conductivity. Concentration anomalies in the dependences of $H(x)$, $S(x)$ and $\sigma(x)$ in the vicinity of $x$ = 0.01 and 0.02 for both the cast and pressed samples are detected. The existence of anomalies is connected with the interaction of atoms in the impurity subsystem of crystal under transition from the diluted solid solution to concentrated one. As shown, a method of preparing (cast or hot pressed samples) has no impact on the existence of anomalous areas in composition dependences of solid solution properties, but slightly changes their character. The non-monotonic character of the properties should be taken into account in practical application of PbSe$_{1–x}$Te$_x$ solid solutions.