By 1921 the congregation had grown to the point where Reinhard Hoyer is added as a second pastor. On feast days the church hall is no longer sufficient for visitors to the church service.
On normal Sundays, it is often filled to the last seat. The wish to build a “real church” cannot be realised due to the devaluation of money caused by inflation. In 1922, the young Lübeck artist
Erich Klahn redesigns the three windows of the church hall on the west side into a memorial for the fallen of the First World War.
In addition, the parish council decides to purchase the adjoining property Moislinger Allee 98 in order to build a larger church hall there. This is supposed to solve the lack of space. The economic
recovery in the 1920s gives the congregation hope for the construction of its own church. However, the Great Depression at the end of the decade shatters these plans yet again. The parish council
once more commissions Erich Klahn to redesign the chancel in the church hall according to the spirit of the times.
Erich Klahn painted the apse with a cross formée typical for the Teutonic Order. The rune-like inscription quotes the Bible with the word of John 8/12: “I am the light of the world: he that followeth me shall not walk in the darkness, but shall have the light of life.”