From a priest:
I hope you can help me out. I’m seeking this for those I know…
I’m looking for detailed plans to construct a traditional, screen only, soundproof confessional, priest in the middle, a penitent on either side, with doors that are heavy, but can be opened with one arthritic finger, both sides having kneelers and chairs that, with use, would change indicator lights outside from green to red. And there should be room for a wheelchair on one side, and the ability for the priest to flip the light from green to red for that side in that circumstance. There can be no steps. There would have to be ventilation, but without losing soundproofing. The sliding doors for the screens should also be soundproof, yet easy to slide back and forth.
Surely some of your priest readers have revamped some awful confessionals and even built new ones that are more appropriate for the encouragement of confessions.