Lot depth

Lot depth is the horizontal distance from a lot's street line to its rear lot line — in irregular cases, a mean of varying distances. Depth determines how a lot experiences the bulk rules: rear-yard requirements consume a fixed depth from the back, so a shallow lot loses proportionally more of its ground to the same obligation, and the buildable footprint between street wall and rear yard can become thin enough to strand floor area.

Depth also interacts with district boundaries drawn at stated depths from the avenue — the standard geometry behind split lots — and with sky exposure planes, whose rising slope gives deep lots more room to grow tall toward the rear. Two lots of equal area but different proportions can hold very different buildings.