1812 Trinity Avenue Centrally located in one of Walnut Creek' s most coveted neighborhoods, Atrium Downtown fuses city energy with nature-inspired touches that make a statement. Our one and two-bedroom boutique apartments aren 't ordinary. They command attention. And for good reason. Every detail in our highly sought-after community is sharp, from the soaring windows that fill your home with natural light, to the premium finishes that make each day that much better. And with perks that work as hard as you do, your lifestyle gets an upgrade at every turn. It' s your private atrium. A bright, open sanctuary tucked within the city streets.