Duolingo Bails On Old East Liberty HQ As Prime Corner Hits Market

Duolingo is officially saying goodbye to its original headquarters at 5900 Penn Avenue in East Liberty, putting one of the neighborhood’s most recognizable tech addresses back in play. The two-story building, long a visual shorthand for East Liberty’s startup boom, is now being quietly shopped to new tenants while ownership weighs its options for the site.

Brokers begin marketing the block

According to the Pittsburgh Business Journal, brokers are now marketing the roughly 77,000-square-foot building at 5900 Penn Ave to potential tenants following Duolingo’s notice to vacate. The listing puts one of East Liberty’s higher-profile office properties back on the market at a time when interest in the neighborhood’s retail and office corridors has not exactly cooled.

From startup HQ to listed asset

For years, Duolingo’s SEC filings have pointed to 5900 Penn Avenue as the company’s principal executive offices, underscoring just how rooted the firm has been in this stretch of Penn. Duolingo's Form 10‑K shows the Penn Avenue address, while the company’s growth later pushed it into larger digs at the Liberty East development, a move covered by Technical.ly Pittsburgh. That step up in square footage goes a long way toward explaining why the original Penn Avenue building is now up for grabs.

Property details and a curious size gap

The property manager’s page for 5900 Penn Ave describes a mix of Pittsburgh office space and street-level retail with a mezzanine. Alphabet City Company lists both retail and office components at the address, while an older commercial flyer on LoopNet cites a smaller footprint of roughly 38,988 square feet. That size gap suggests brokers may be packaging adjacent areas or counting mezzanine and retail space to reach the larger figure, an interpretation that is an inference drawn from the differing public listings.

What to watch next

For East Liberty, this listing is a small but telling test of where the neighborhood is headed. The block could land a single marquee corporate tenant, be carved up for a cluster of smaller firms, or tilt further toward retail and community-oriented uses. We will be watching how the listing details evolve, when tours get underway, and any new filings that reveal who moves in next and what that means for the neighborhood’s next chapter.