22.124.260

From the ordinance

Provided the gross square footage of a building or structure of a landmark or contributing property does not increase, a landmark or contributing property shall not be required to provide more parking spaces than the number of spaces existing on the landmark or contributing property site as of the effective date of the designation of the landmark or historic district.

Parking requirements

{
  "landmark": "No more parking than existing if gross square footage does not increase."
}