A wireless sensor assembly comprising: a wall plate; a threaded fastener or a releasable adhesive strip, which includes a release tab, the release tab extending beyond a periphery of the wall plate; wherein the wall plate is configured to be secured to a wall of a building (2, 384, 386, 388, 390) using either the threaded fastener or the releasable adhesive strip; wherein the wall plate includes an aperture therethrough for accommodating the threaded fastener and a recess on a back surface of the wall plate to accommodate at least part of the releasable adhesive strip; and a sensor housing including a front housing region and a back housing region, the back housing region configured to be releasably secured to the wall plate, the back housing region including. a primary recess that is configured to receive at least part of the wall plate when the back housing region is releasably secured to the wall plate; and a secondary recess contiguous with the primary recess, the secondary recess configured to accommodate the release tab of a releasable adhesive strip such that the sensor housing hides the release tab of the releasable adhesive strip from view when the back housing region of the sensor housing is secured to the wall plate; one or more sensors (708, 708a, 708b) disposed within the sensor housing; and a transmitter for transmitting sensor values provided by the one or more sensors, the transmitter is configured to be in wireless communication with a building control system that utilizes the transmitted sensor values in controlling a building system of the building. a wall plate; a threaded fastener or a releasable adhesive strip, which includes a release tab, the release tab extending beyond a periphery of the wall plate; wherein the wall plate is configured to be secured to a wall of a building (2, 384, 386, 388, 390) using either the threaded fastener or the releasable adhesive strip; wherein the wall plate includes an aperture therethrough for accommodating the threaded fastener and a recess on a back surface of the wall plate to accommodate at least part of the releasable adhesive strip; and wherein the wall plate is configured to be secured to a wall of a building (2, 384, 386, 388, 390) using either the threaded fastener or the releasable adhesive strip; wherein the wall plate includes an aperture therethrough for accommodating the threaded fastener and a recess on a back surface of the wall plate to accommodate at least part of the releasable adhesive strip; and a sensor housing including a front housing region and a back housing region, the back housing region configured to be releasably secured to the wall plate, the back housing region including. a primary recess that is configured to receive at least part of the wall plate when the back housing region is releasably secured to the wall plate; and a secondary recess contiguous with the primary recess, the secondary recess configured to accommodate the release tab of a releasable adhesive strip such that the sensor housing hides the release tab of the releasable adhesive strip from view when the back housing region of the sensor housing is secured to the wall plate; a primary recess that is configured to receive at least part of the wall plate when the back housing region is releasably secured to the wall plate; and a secondary recess contiguous with the primary recess, the secondary recess configured to accommodate the release tab of a releasable adhesive strip such that the sensor housing hides the release tab of the releasable adhesive strip from view when the back housing region of the sensor housing is secured to the wall plate; one or more sensors (708, 708a, 708b) disposed within the sensor housing; and a transmitter for transmitting sensor values provided by the one or more sensors, the transmitter is configured to be in wireless communication with a building control system that utilizes the transmitted sensor values in controlling a building system of the building.