BROOKLYN - Some residents in Prospect-Lefferts Gardens traveled to City Hall today to urge the mayor's office to prevent the construction of a proposed luxury high-rise.

The 23-story building at 626 Flatbush Ave. is funded in large part by the city and state. One in five of the apartments will be set aside as affordable housing, but residents in the area say it doesn't matter.

Those who oppose the high-rise claim that a mandatory environmental impact study was never done. They also say that the building would have many negative effects on the area.

A spokesperson for the developer Hudson Companies Incorporated says the project meets city zoning codes and all environmental reviews were completed.

Some Brooklyn residents aren't buying it, and they also fear that the building would cast a large shadow over Prospect Park.

The building is expected to be completed by early 2016.