The name Säby kyrka has a curious history. According to the Botvid legend, the earliest church in Salem was known by this name and stood by the shore of Bornsjön lake, on the site later occupied by Salem's medieval church. The current building borrows this historic name but is otherwise unconnected in fabric or location to that earlier structure.
The present timber church was designed by the architect Rolf Bergh and consecrated in 1974. It is a prefabricated, transportable type of church building, constructed on a square plan beneath a pyramid-shaped roof. Its most distinctive architectural feature is the glazing at the four corners of the walls, complemented by a continuous band of windows running beneath the roofline, giving the interior an unusually bright, modern character.
The church is physically joined to a range of parish facilities, including offices for the clergy and church wardens together with a parish hall. A substantial reorganisation and rebuilding of these adjoining premises took place in 2001, when a folding partition wall was installed between the church itself and the neighbouring parish room, allowing the spaces to be combined or separated as needed.
The church's organ, built in 1976 by Walter Thür Orgelbyggen of Torshälla, is a mechanical instrument typical of the period's craftsmanship, reflecting the wider mid-to-late twentieth-century revival of tracker-action organ building in Sweden.