New filings from Lennar Multifamily Communities indicate the developer is continuing to move forward with its plans to develop the Midtown Center, a block at 23rd and Union that many see as one of the last major development opportunities in Central Seattle. They also provide the first look at the exact scale of development being planned for the block —  a 405-unit, mixed-use project with nearly 500 parking spots:

The new documents are part of a process to bring the project into Seattle’s design review process. No review has yet been scheduled.

In June, CHS broke the news on Lennar’s involvement with the 106,000-square-foot property once home to the U.S. Post Office and still busy with tenants including a liquor store and Earl’s Cuts. Company officials have not responded to requests for comment on the project. A representative from Encore Architects, the firm working with Lennar on the project told CHS the early site work was a preliminary study.

There is still no record of a sale for Midtown Center. A $23.5 million deal with another California-based developer, Legacy Partners, fell through earlier this year.

Prior to its 23rd and Union acquisition, Lennar had its sight set on another neighborhood-defining project when it submitted a proposal to develop the Capitol Hill Station “transit oriented development” sites on Broadway. Lennar is in the early stages of developing a mixed-use project at 22nd and E Madison. Meanwhile, the developer is building a 389-unit West Seattle project, The Whittaker, which will include a Whole Foods on the ground floor.