The City of Windsor is moving forward with plans to demolish the former Grace Hospital building.

It hosted an on-site meeting Monday for companies interested in cleaning up the property.

Six companies from across Ontario have qualified to bid for the job of tearing down the old hospital.

Mario Sonego, the city engineer, said bidders have one week to submit their tenders. The deadline is Jan 15.

"We know their pre-qualification was they have had to have done a project of this magnitude, so we know they can do it," Sonego said. "So we're expecting a good competitive bid."

The cost of demolishing the building and cleaning up the site is estimated to be between $2.5 million and $4 million.

Shelby Askin Hager, the city's deputy solicitor, said pre-qualification requirements are rare.

"We don't always do pre-qualification processes for demolition, but this is a significant project. It's a large project. It's one of the largest Windsor has seen in a long time," she said.

It will take a few months to clean up the site.

Precautions need to be taken since the building contains asbestos.

City council has not decided what to do with the site in the future.

One suggestion is to rezone it for a combination of residential and commercial uses.

The work is expected to be complete sometime in the summer.