Ervika Farm is situated in rural surroundings in Bergsvågen, north of Harstad. The site lies on a raised area in the terrain, its front side facing south-east and down towards the sea. The house is a Nordland mid-hallway house, with a living room on either side of a hallway situated in the middle of the width of the house. The house is built of cog-jointed timbers and is two storeys high. The roof is tiled with slates and the exterior cladding of the house comprises vertical panelling. The small-paned windows have red-painted surrounds that stand out in contrast to the light grey colour of the rest of the house.

The building was preserved in 1942.