State and local officials came together in Prospect Heights Monday to speak out against proposed changes to the ongoing Atlantic Yards Pacific Park Project.

Assembly members Walter Mosley, Joanne Simon and other elected officials joined community advocates at the project site.

They’re opposing a proposal that would give developers of the project an extra 105,000 square feet of development.

The Atlantic Yards Project, renamed “Pacific Park,” was first approved by the state in 2006. The $5 billion project includes Barclays Center and the development of 16 buildings for residential and commercial use.

Among those new apartments, developers promised to include more than 2,200 affordable housing units. Now, developers are asking for more space for a fitness center and field house.

Leaders and community advocates are calling on Gov. Andrew Cuomo to put a stop to the proposal. They say they want to see a review completed first to assess how the extra space would impact the environment.

They also want developers to be more transparent about the plans for the affordable housing units. They say in the time the project has been underway there has not been enough progress in getting those completed.

"It's appalling that we are standing here again in the year 2019 still asking for the simplest public benefits. The simplest things that we need as Brooklynites and as a New Yorkers,” says stateAssemblyman Walter Mosley.

Leaders say a vote is scheduled Monday with a final vote on Thursday on whether or not to approve the proposal.