I measured the one I have on my floor and I think it will require a minimum of 35" width, even then the top (attached) cushions likely will be dragging the threshold, so door jamb pads would be in order. Also keep in mind these are handmade pieces, so one sofa may need 34 1/2" and another 35 1/2".

Its so close to your doorway measurement that you will want to have a contingency plan if they can't get it though (such as removing door trim and moldings). Fitment on special orders is rarely guaranteed from any store or dealer. This is also a 300 lb sofa, so it can depend on how good the delivery team is as well. You run out of gas pretty fast moving this one around.