DOT Block, the ambitious mixed-use development project that could bring hundreds of new housing units to Dorchester Avenue, is facing a new round of changes to its design and timeline that could delay its review by city planners.

According to Catherine O’Neill, who represents the development team, design changes are still possible and “some of the considerations revolve around getting the best retail we can [for the site].”

This may include alterations to the open pedestrian walkway, touted as the centerpiece of the project in all previous iterations. However, specifics on potential alternate designs were not made available to the Reporter.

The development last went before the public at a Boston Redevelopment Authority-hosted meeting in October. At the time, the scope was a total of 385,000 square feet of residential and retail space, not including a five-story parking structure. The property is bounded by Hancock, Pleasant, and Greenmount streets, and Dorchester Avenue.

Between the first and most recent iteration, the overall design was only changed with regard to the portion of the property abutting Dorchester Avenue. Efforts are still under way to bring three corner properties back into the development plan after the team lost control of the properties earlier this year. However, the overall scale shrank from 4.75 acres to 3.95 acres, with a loss of 6 housing units, 19,500 square feet of retail space, and 22 parking spaces.

Public comments on the project closed in October and the proposal still needs to go before the Boston Design Committee. The development team had been eyeing a design committee meeting before now, but that schedule could be pushed back about four weeks, O’Neill said. This will not have an impact on the proposed groundbreaking in the spring, she said.

Nick Martin, a spokesman for the BRA, said: “We continue to work with the developer to review potential changes to the design of the project. It’s a complicated site, and we want to make sure the project unlocks the full potential of the site and the surrounding neighborhood.” He added, “The community will certainly have an opportunity to weigh in on any revised proposal before we consider approving the project.”

The mixed-use DOT Block project will “set the agenda for the area, O’Neill said. “This is why we are taking great thought and consideration, because we want to be perfect.”