Los Angeles-based development firm Hypericum Companies has started construction for On Butler, a mixed-use complex near Sawtelle Boulevard.

The six-story building, now rising at 11421 W. Olympic Boulevard, will feature 70 market-rate apartments, seven units of affordable housing and roughly 6,500 square feet of street-fronting retail space.

Architect Farhad Ashofteh designed the mid-rise development, which evolved over the last five years through a series of redesigns at the behest of neighboring residents.

The property sits one block west of Lumen West L.A., the proposed rebrand and expansion of the 1980s Trident Center office complex.