Has anyone had any experience with an exemption to a requirement due to a historical building or feature?

This is regarding the requirement that no more than 30% of the primary façade can be without doors/windows. The project I’m working on has an existing brick wall along the inner sidewalk that curves down the sloped road (along with our new construction). Per requirement of the city we cannot remove/alter the brick wall as it is a historical landmark. With the slope of the sidewalk, the brick starts at the basement level and ends at the first level. Both are 100% storefront glazing behind the brick, and since it slopes, most of the first level does end up uncovered by it, just not at street level. We won’t meet the 70% window/door coverage, but I believe the historical brick is not taking anything away from the walkability of the sidewalk. It has trees on the street side and plants along the top of the brick wall that trail down.

Does anyone have any input on this? Do you think we can get around it?