After finalizing deals for a Hofbrauhaus restaurant and a $48 million luxury hotel and condo development, the Soffer Organization is gearing up for an encore -- as many as two more office buildings at its SouthSide Works complex.

Soffer has invited local real estate brokers to a reception Feb. 7 to unveil plans for one of two additional office buildings under consideration for the Monongahela riverfront property.

The building to be discussed that evening is called Quantum 5 and would be adjacent to the proposed Hofbrauhaus restaurant, which is expected to open next fall after several years of delay.

Mark Dellana, Soffer executive vice president of operations, development and construction, said the reception is a way of letting brokers know "what possibilities are remaining at the South Side development."

The potential new development comes on the heels of two good months for Soffer, which presented plans for the German-style Hofbrauhaus, only the third in the United States, to the city Urban Redevelopment Authority this month.

In December, the URA approved the sale of an acre at the SouthSide Works complex to DOC-Economou for a mixed-use development that will feature 140 hotel rooms, 23 private condos, a 20,000-square-foot spa, a two-story ballroom, an 18,000-square-foot events center, and another 20,000 square feet of retail and dining space.

The Quantum 5 building would supplement two existing office buildings at the complex and another under construction that will serve as part of the American Eagle Outfitters headquarters. Another building, Quantum 4, also is in the planning stages.

Mr. Dellana and Jim Wilding, Soffer executive vice president, said the reception will kick off the search for tenants to occupy Quantum 5.

"We're looking for a major tenant. When we get a major tenant we will proceed," Mr. Wilding said.

Landing a lead tenant first helps from a design standpoint, he noted, although he added it also is beneficial "in taking the recession equation out of it."

Quantum 4 would be built adjacent to the Quantum 3 building, which will house American Eagle and which is expected to open this fall. The retailer now occupies one building at the site and will continue to use it and the new one once it opens. There's talk that the retailer could add yet another building at some point.

"That could happen," Mr. Wilding said. "The one's being built right now. The other would be purely dependent on their needs and timing."

An American Eagle spokesperson could not be reached for comment.

There's also speculation that Equitable Resources, which has its headquarters in a new office building on the North Shore between PNC Park and Heinz Field, could be interested in moving elsewhere, with the South Side as one possibility.