An adjustable hinge block includes first and second complementary members, each defining therein a first and a second slit respectively. The members are adapted to mate with each other such that the first and second slits at least partially align with each other to define a third slit. First and second wing members protrude from the members respectively such that the wing members lie on opposite sides of the third slit when the members mate with each other. The wing members each define therein a first and a second aperture respectively, which first and second apertures are adapted to receive a fastener. First and second side members, each define therein a third and a fourth aperture respectively, such that the third and fourth apertures is adapted to align with the first and second apertures respectively.