[1] The church is located at Alstahaug, a small peninsula on the southern end of the island of Alsta.

It is the church for the parish of Alstahaug, which is part of the Nord-Helgeland deanery in the Diocese of Sør-Hålogaland.

[2][3] The Romanesque stone church has a rectangular nave and a narrower, almost square chancel where the width is greater than the length.

In a first construction phase, the choir and the first 1 metre (3 ft 3 in) or so of the eastern part of the nave were built using locally sourced soapstone.

The original sections were partly restored to their former appearance with smaller windows and steeper roof angles.