The church is a single-nave, rectangular
long church. The roof structure is supported by four corner pillars and has no additional supports in the interior. The wall panels are clamped between the corner pillars and supported by additional posts. Around the church there is an arc with small arcs to the north, south, and west. The main entrance is on the west. In 1928, the remains of a decorated
archivolt were discovered above the entrance, between the pillars. The outer layer of the building forms a wooden shingle
façade that clad the walls as well as the roof and the corner pillars. The church construction is (for the most part) like other well-known stave churches of this size, but the solutions and work stand out in a somewhat shallow design. There is also very little decoration in the form of elaborate details and sheds on the oldest parts of the church. When the church was first built, it was a simple small single-nave
long church in stave-work, measuring less than . This was probably a common size of village stave churches in Norway during the Middle Ages. The
nave measured and the
choir was wide. The first choir was demolished in the 17th century, but there is a sign of it in the building. The roof of the choir was somewhat lower than that of the church. The choir probably had no more than of floor space. The church did not initially have open-air corridors surrounding it, but it did have a tower on the roof in the middle of the building the start. Simple stave churches like this one have a construction where bottom sleepers lie on a stone wall and are tied together in the corner by standing corner staves. At the upper end of the corner rods, the rod leg is tapped in. Between the bottom villa and the stave floor are the wall planks that are fastened in quadrants with tongue and groove. The upper corners are reinforced with knees made of angular wax, often taken from the transition between trunk and root. The roof construction is made up of reinforced rafters, cock beams and knees, fastened to the pole. This is how the Eidsborg church is built, but unlike other stave churches, the bottom villas in the Eidsborg church are not lathed over one another in the corner, but only seen next to each other and held together by the corner staff. This is a less stable construction than usual, something that may indicate that less experienced stave church builders were on the work team who set up the oldest part of the church. On the bottom villas, there is a clear ax mark after counting, both on the outside and inside. This is also an unusual feature because in other stave churches, all such marks are plastered away so that the walls are smooth, especially on the inside. There were two entrances to the church, one in the choir and one in the nave, both on the south side of the church. In the bottom villa below the entrance to the church, a double-arch profile has been preserved. Probably there was one like this also on the upper side of the door, and correspondingly at the entrance to the choir. This is a Gothic decorative element that is not known from many churches, but they are dated to around 1250–1300. Double arches can also be found on some small windows on the roof tower. Two church bells from the Middle Ages hang inside the tower. The oldest of them is stylistically dated to 1250–1280, while the other is several decades younger. It is these three things that point to the fact that the church was built sometime between 1250 and 1280. The church was repeatedly changed through restorations. Nevertheless, the nave is considered to have been preserved in the original. In 1693, the
roof turret was rebuilt, and in the 19th century the church was extended to the east. In the 1920s and 1930s, the false ceiling was removed and small windows were inserted. During the restoration, a fireplace was discovered under the floor. This served possibly for burnt offerings of pagan cults. The wood shingle facade dates from the 1970s and shows cracks. During the early 2000s, breakage was found on the main structure. Rafter girders were kinked and pushed down by the load. An additional supporting structure was then installed above the rafters and the wooden shingles were replaced. ==Media gallery ==