Most of the damaged was contained to a clothing store called Unica that had previously closed. That part of the building, which was under renovation, had the front of the store burned out.
The fire spread through the basement and cockloft, the area above the main floor.
Firefighters had to evacuate the building about 90 minutes after they first arrived with flames began shooting out the roof at about 1 p.m.
Units from Springfield, Irvngton, Newark, Summit, Maplewood, West Orange, South Orange and Livingston were helping battle the flames.