It's not a professional or collegiate choir; it's all amateurs, unpaid, and all singers and directors/accompanist are volunteers. (There is a brief audition, which I already passed at a sister choir, so that's beside the point of this question for now.)
I have about an octave and a fifth (and a bit more) where I can produce a consistent, pleasant tone, with good pitch control and projection, with no strain. Outside of that octave and a fifth, the tone progressively gets worse and I have less pitch control.
I am working on all this technique-wise, but I'm just curious if an octave and a fifth+ of decent tone production is enough for most amateur volunteer choirs.