Narrow original openings
A lot of the houses in this service area went up between 1938 and 1987, with the bulk clustered around 1961. Original openings from that era sometimes run narrower than the 16-foot double-door standard builders use now, and on those we often end up quoting a custom-width door rather than an off-the-shelf one. That changes the price and the lead time, and we won't guess at either until we've measured.