The decision to build a new church was taken as early as 1855, but disputes over the plan dragged on for years before construction finally went ahead. The old medieval church, which had stood beside the Löftaån river, was demolished in 1865, and fittings not reused in the new building were sold at auction. Although the new church was completed in 1866, its formal consecration did not take place until 1874.
The building is constructed of whitewashed granite rubble in the Neo-Romanesque style, with touches of Italian Renaissance detailing. It has a rectangular nave with a 35-metre tower to the west, and a polygonal extension on the eastern side of the nave housing the sacristy, which is separated from the chancel by a screen. The windows are round-arched and set in coupled pairs, with multi-stepped doorways.
The demolished medieval church had painted ceiling boards from 1796 by Jacob Magnus Hultgren. When the building came down, parishioners salvaged some of the boards and reused them as building material; a number have since been recovered and are kept by the Frillesås local heritage society.
Among the older fittings retained is a font of soapstone, thought to date from after 1250 and considered unique in Halland; only two fragments survive, mounted on a modern granite base in the south of the chancel. The pulpit with its canopy and the altarpiece surround date from 1866 and were designed by the church's architect, built by Johannes Johansson of Mjöbäck. The altar painting of the Ascension was added in 1871, the work of Carl Gustaf Holmgren, and the altar crucifix was a donation made in Oberammergau. The larger of the two church bells dates from the 15th century and carries no inscription.