Three separate demolition permits have been issued for three adjacent residential` buildings, located at 4115-23 N Whipple Street in Irving Park. Collectively owned by MK Construction & Builders Inc, all three of the structures are frame. Each property also has a detached frame garage that will also undergo demolition. While it is unclear what the owner has planned for the parcels, each is zoned for RS-3 Residential Single-Unit District, which allows for detached single family homes and two-flats. RS-3 also permits a maximum height of 30 feet and a floor area ratio of 0.9, whereby any replacing structure may have up to 90 percent of the square footage of the lot itself.