Hagakyrkan was built following an architectural competition in the 1920s, won by John Åkerlund. His design consisted of two long buildings linked by a covered gallery, or "gallerian": one wing for municipal use, the other for church purposes. The complex was inaugurated on 27 September 1936 by Bishop Einar Billing, originally under the name Borlänge-Domnarvets församlingshem. It replaced an earlier, temporary parish room that had served the growing town since 1902, at a time when the nearest established churches, Stora Tuna and Amsberg chapel, lay several kilometres away.
The building's name changed to Hagakyrkan in 1972, reflecting its continuing role in local worship; services are also held in Finnish, and the church is sometimes known by the Finnish name Hagakirkko.
Inside, the font, altar and chancel floor are made of Brunflo limestone, with reliefs by the artist Simon Gate, who also created the mosaic of Christ above the altar and several candlesticks combining blue glass with metal. Crystal chandeliers from the Orrefors glassworks hang in the nave, and two floor candlesticks by Anders Carlsson were donated by SSAB in 1986. A crucifix by Arvid Backlund and a patchwork textile piece by Sofia Widén, depicting a holy city, decorate the north and south walls respectively.
The church's pneumatic organ was built in 1936 by Nils Hammarberg, originally with 13 stops rather than the 15 intended in the design; the missing stops were added during a 1984 renovation. A wider restoration in 1974, overseen by Åke Temnerud, altered the colour scheme and lighting of the church interior and extended the organ loft. The original pews were replaced with chairs in 2001.
Today Hagakyrkan houses the church itself alongside a parish hall and the parish office for Stora Tuna and Torsång, continuing the dual civic-religious purpose envisaged in Åkerlund's original design.