What is price per square foot and why is it important? Price per square foot or PPSF is the price divided by the square footage. PPSF is used to determine value in a building. The price per square foot of a unit can vary drastically within one building and it can also change from one building to the next. These differences in price can be attributed to a number of factors. Within one building the price can vary unit to unit due to the finishes, upgrades, view, layout, and the addition of parking and/or locker. Differences in price per square footage from building to building can be attributed to the age of a building, the neighbourhood amenities, and sometimes even the maintenance fees in the building.