Building surveying device for measuring and marking spatial points in the course of construction and/or development - in particular interior finishing - of buildings, comprising • a base, • an upper part supported on the base such that it can rotate about a rotation axis, • a sighting unit supported on the upper part such that it can pivot about a pivoting axis and providing distance measuring functionality, with a laser source designed for emitting a laser beam, and a laser light detector, and • an evaluation and control unit, wherein • a first and a second rotary drive enable the upper part and the sighting unit to be driven and aligned, • a spatial alignment of the sighting unit in relation to the base can be acquired via two goniometers, • the evaluation and control unit is connected to the laser source, the laser light detector and the goniometers in order to assign an acquired distance to a corresponding alignment and thus to determine coordinates for spatial points, and • the building surveying device has a plumb point finding functionality which, after being triggered, runs automatically, at least in part, and in the course of which the alignment of the sighting unit can be changed under automatic control by the evaluation and control unit with the aid of the first and/or the second rotary drive and as a function of a known, defined first spatial point in such a way that precisely one such second spatial point lying on an object surface (3, 3') can be approached and marked by the laser beam, which lies opposite to the first spatial point on a vertical plumb line having a perpendicular direction, assumed to be vertical, containing the first spatial point, in particular wherein spatial points lying within a tolerance region defined around the vertical plumb line are also deemed to be lying on the vertical plumb line, characterized in that, • an outer reference with respect to the perpendicular direction, assumed to be vertical, can be produced by inclination sensor means, which are designed for determining the inclination relative to the Earth's gravitational field vector about two axes and for communicating the measurement data thereof to the evaluation and control unit, in particular wherein the inclination sensor means are integrated into the base, and • in the course of the plumb point finding functionality the second spatial point can be automatically measured after the latter has been reached, and a distance is derived as a difference in height between the first and the second spatial point by the evaluation and control unit and can be provided to the user. • a base, • an upper part supported on the base such that it can rotate about a rotation axis, • a sighting unit supported on the upper part such that it can pivot about a pivoting axis and providing distance measuring functionality, with a laser source designed for emitting a laser beam, and a laser light detector, and • an evaluation and control unit, wherein • a first and a second rotary drive enable the upper part and the sighting unit to be driven and aligned, • a spatial alignment of the sighting unit in relation to the base can be acquired via two goniometers, • the evaluation and control unit is connected to the laser source, the laser light detector and the goniometers in order to assign an acquired distance to a corresponding alignment and thus to determine coordinates for spatial points, and • the building surveying device has a plumb point finding functionality which, after being triggered, runs automatically, at least in part, and in the course of which the alignment of the sighting unit can be changed under automatic control by the evaluation and control unit with the aid of the first and/or the second rotary drive and as a function of a known, defined first spatial point in such a way that precisely one such second spatial point lying on an object surface (3, 3') can be approached and marked by the laser beam, which lies opposite to the first spatial point on a vertical plumb line having a perpendicular direction, assumed to be vertical, containing the first spatial point, in particular wherein spatial points lying within a tolerance region defined around the vertical plumb line are also deemed to be lying on the vertical plumb line, characterized in that, • an outer reference with respect to the perpendicular direction, assumed to be vertical, can be produced by inclination sensor means, which are designed for determining the inclination relative to the Earth's gravitational field vector about two axes and for communicating the measurement data thereof to the evaluation and control unit, in particular wherein the inclination sensor means are integrated into the base, and • in the course of the plumb point finding functionality the second spatial point can be automatically measured after the latter has been reached, and a distance is derived as a difference in height between the first and the second spatial point by the evaluation and control unit and can be provided to the user.