The chapel, also known as Fasterna lillkyrka, was built in 1908 with panelled timber walls, replacing the medieval Fasta church whose site remains in the adjoining churchyard, marked today by a bell tower thought to date from 1854. The chapel's single-nave interior features a projecting three-sided chancel to the east, with a sacristy and cloakroom attached, and a porch built into the low extension at the west gable.
Originally designed with numerous tall windows and metal-clad roofs, the building was substantially altered during a 1958 restoration led by architect Sten Hummel-Gumælius. The walls and ceiling were repanelled, the exterior painted in the traditional Falun red with black barge-boards and green window frames, and the number and size of the windows reduced. The centre aisle was widened and the chancel floor raised, and much of the current fittings—including the pulpit, altar rail and pews—date from this refurbishment.
A notable later addition is the stained-glass window above the altar, installed in 1964 and designed by Harald Lindberg. In the northern part of the chancel stands a five-sided font clad in oak veneer, made in 1966 to a design by Hummel-Gumælius, continuing the architect's influence on the chapel's present appearance.
The chapel's organ, built in 1985 by Robert Gustavsson of Härnösand, has eleven stops and replaced an earlier instrument from 1949. Two Baroque-style chandeliers, donated at the time of the 1958 restoration, add a further decorative note to the otherwise simple interior.