ROCKLAND, Maine — A group of investors is expected to unveil in the next few weeks a major downtown redevelopment project that includes retail stores, offices, a potential realignment of streets and possibly a multi-story parking garage.

Rockland Community Development Director Audra Caler Bell announced the anticipated proposal Thursday afternoon at a meeting of the Rockland Economic Development Advisory Committee.

The names of the developers are not being released until they announce their plans, Caler Bell said.

She said the investors have the financial backing to complete the project.

“This is not pie in the sky,” Caler Bell said.

The city has been trying to redevelop the Tillson Avenue area of Rockland for more than a decade. The area, which is dotted with empty warehouses and vacant lots, is located between downtown Main Street and the waterfront.

The developers have been in contact with the city and the owner of most of the properties where redevelopment is planned. The current property owner is interested in selling the properties to the developers, according to Caler Bell.

The planned development calls for some light industrial space north of Tillson Avenue with retail stores lining Tillson Avenue. The property, where Redlon & Johnson operated its business until a fire in June 2014 heavily damaged the building, will consist of retail on the street level and offices on the upper floors, the community development director said.

The major development may require realigning streets, she said. If that is done, the developers would pay for any infrastructure changes. The developers also have expressed an interest in a multi-story parking garage.

The City Council would have the final say on the sale of any city properties to the developers or any changes in the roads, she pointed out. One city-owned parcel in the development area is a parking lot between Tillson Avenue and Winter Street. The developers also would be interested in a tax increment financing plan to help pay for such public improvements, she said.

The community development director said the under construction Center for Maine Contemporary Art on nearby Winter Street was a huge selling point for the developers, and regular air service to Boston from the neighboring Knox County Regional Airport in Owls Head also played a role in the decision to undertake a development in Rockland.

The city sought proposals from potential developers and received one submission from John Morris Architects, which Caler Bell said was not so much a development plan as a notice to any potential developers that he was available to help them draw up plans so they would conform with the city’s vision for development.

The properties to be redeveloped include lots and buildings owned by corporations overseen by Finlay B. Matheson of Miami. The Matheson properties include the former Bicknell Manufacturing plant at 11 Lime St., an adjacent vacant lot at 8 Lime St., 9 Wharf St., 14 Wharf St. and 65 Tillson Ave., where Redlon & Johnson plumbing and heating supply operated.

Matheson could not be reached for comment.