Before the church was built, islanders faced a lengthy journey to worship, row across to Måkesund and walk some ten kilometres to Lur via Kragenäs for christenings, confirmations and other services. Wanting burials and Sunday worship closer to home, Resö residents began fundraising in 1913, with contributions from a few kronor to larger sums, including help from Strömstad. The collection covered roughly half the 8,000 kronor building cost, and the remainder was borrowed. A local board, drawn from Resö and Galtö, oversaw the project, and the land was donated by August and Oleana Olsson of Norrgårdö.
Designed by Albin and Carl Wilhelm Gustafsson of Borås and built by carpenter Ejnar Eliasson, the church is a wooden, shingle-clad building in national romantic style, with a rectangular nave, narrower chancel to the east and sacristy to the north. A copper-clad turret sits above the main entrance; sources differ on whether this cladding, or the shingles beneath, is original. The churchyard wall and its stone gate portals were built by parish men and the stonemason August Lantz, who also carved several early gravestones marked by distinctive round stone spheres.
The church bell, cast in the sixteenth century (sources give differing dates, 1570 or 1576) and inscribed in German with a phrase on the beginning of wisdom, came on loan from Lur's old parish church. It is said still to call the congregation to worship. Inside, the chancel's semicircular wall was once richly decorated in gold-bronze ornament, later painted over during a 1950s renovation; a later restoration around 1998–2000 sought to recreate the church's original blue-green and brown colour scheme. A painted image of Christ above the chancel arch is believed to have been lost beneath later overpainting, despite attempts to locate it.
The altarpiece, painted in 1936 by C.O. Svensson, and the pulpit paintings, completed in 1959 by Folke Persson depicting the four evangelists, are among the more notable furnishings. A chancel window by Joel Mila, showing Christ and a dove, was installed in 1971 (Wikipedia gives 1973), replacing an earlier window that has been preserved. The granite font, church silver, and a handmade Norwegian silver christening jug are also of interest; the church's silver was once stolen and recovered, damaged, from a wrecked car near Gothenburg.
Several furnishings reflect the generosity of parishioners and summer residents over the decades: a bridal crown made by a Strömstad silversmith, an idiosyncratic model of the warship Vasa carved from imagination by a local islander, and a wrought-iron candle-bearer used each All Saints' tide. A now-disused warm-air heating system beneath the chancel, considered advanced for its time, survives as a curiosity. Visitors may also notice that pews on one side of the aisle retain old coat hooks, a trace of a former custom separating men and women during worship.