A door jamb for mounting an in-swing door to provide a flush finish, said door jamb comprising: a) first and second, spaced side wall segments for attachment to opposite sides of a wall stud at a door opening; b) third, fourth, fifth and sixth contiguous wall segments extending from said first side wall segment toward said second side wall segment, said third and fourth wall segments forming a protrusion at their juncture, said protrusion and said first side wall segment being offset from each other and thereby defining a space (d 10) for filling with a wall finishing material and wherein in the mounted position the door latch face front edge (16a") is positionable closely adjacent said protrusion to create a flush finish of the door front surface with the wall surrounding the door opening; c) said fourth wall segment extending parallel to and spaced from said sixth wall segment such that said fourth, fifth and sixth wall segments together form a stepped surface against which a complementary shaped door latch face surface of an in-swing door is positionable when in the closed position; whereby d) the door jamb further comprises seventh, eighth and ninth wall segments extending contiguously between said second side wall segment and said sixth side wall segment said eighth wall segment extending spaced and parallel to said sixth side wall segment, the juncture of said eighth and ninth segments forming a second protrusion, said second protrusion and said second side wall segment being offset from each other and thereby defining a space (d 11) for filling with a wall finishing material; characterized in that said fourth and said fifth wall segments and said fifth and said sixth wall segments each enclose an obtuse angle. a) first and second, spaced side wall segments for attachment to opposite sides of a wall stud at a door opening; b) third, fourth, fifth and sixth contiguous wall segments extending from said first side wall segment toward said second side wall segment, said third and fourth wall segments forming a protrusion at their juncture, said protrusion and said first side wall segment being offset from each other and thereby defining a space (d 10) for filling with a wall finishing material and wherein in the mounted position the door latch face front edge (16a") is positionable closely adjacent said protrusion to create a flush finish of the door front surface with the wall surrounding the door opening; c) said fourth wall segment extending parallel to and spaced from said sixth wall segment such that said fourth, fifth and sixth wall segments together form a stepped surface against which a complementary shaped door latch face surface of an in-swing door is positionable when in the closed position; whereby d) the door jamb further comprises seventh, eighth and ninth wall segments extending contiguously between said second side wall segment and said sixth side wall segment said eighth wall segment extending spaced and parallel to said sixth side wall segment, the juncture of said eighth and ninth segments forming a second protrusion, said second protrusion and said second side wall segment being offset from each other and thereby defining a space (d 11) for filling with a wall finishing material;