Has to be customized for each situation. No two are alike.
Often there are unhappy surprises such as a structural column in the wrong place or the discovery of a heating duct or electrical panel or conduit that cannot be relocated.
You need an architect. And an engineer.
The plans need to be approved by the diocese [often a committee of architects] and also by the municipality and you will need a building permit.
Depends on the heights above the sidewalk or below the sidewalk [if there is basement access that is also needed for a social hall.]
Could be very expensive.
An elevator could be $200,000.
However, in addition. it would be useful to have a committee of street-smart parishioners, handy-men, etc, who could come up with a DIY approach. Some kind of ramp plus landscaping.
