A Spokane company is considering a new concept for a future commercial and residential development on Hamilton Street just east of Gonzaga University, a predevelopment application on file with the city of Spokane shows.

The project being floated by LLC & M LLC would include a $6 million, four-story structure with 56,800 square feet of floor space. The project site would include nearly 2 acres of land that take up most of the block bordered by Hamilton and Columbus streets and Cataldo and Desmet avenues, a conceptual site plan filed with the application shows.

LLC & M is a real estate investment and development company managed by Greg Byrd, of Spokane-based Byrd Real Estate Group LLC. Byrd couldn't be reached for comment.

Predevelopment is an optional preliminary stage of the planning process which aims to identify potential hurdles a project may face before the applicant files for land-use and building permits.

The project, tentatively called Hamilton Mixed-Use, would have retail space on the first floor, medical or professional offices on the second and third floors, and multifamily residential units on the fourth floor, predevelopment information says.

The project would include a basement parking level with 46 parking stalls and surface parking areas on all sides of the building, with a total of 71 parking stalls, the application says.

ZBA Architecture PS, of Spokane, designed the conceptual plan and filed the application. No contractor has been named for the project yet.

Most of the six-parcel project site is vacant land with the exception of a 5,000-square-foot, single-story office building on the southeast parcel. The building, which is vacant, would be razed to make room for the development, the conceptual plan shows.

Two small lots at the northeast corner of the block that have residential structures on them aren't part of the envisioned project.

Three single-family homes that had been on the project site were demolished a number of years ago. In 2008, LLC & M had proposed to develop a smaller three-story retail and office structure. That proposed project, called Hamilton Square, didn't come to fruition.

In 2011, LLC & M developed the $1 million, 8,400-square-foot Clementine Square multitenant center, on the west side of Hamilton, a block north of and across Hamilton from the envisioned Hamilton Mixed-Use project.