DETROIT -- Quicken Loans founder Dan Gilbert submitted a proposal Monday to take ownership of the Wayne County jail site on Gratiot Avenue in Downtown Detroit, offering to build an entirely new criminal justice complex in a separate location.

Gilbert's Rock Ventures LLC submitted the offer to build a new consolidated criminal justice center that would include adult and juvenile detention facilities as well as a new criminal courthouse in exchange for the transfer of the Gratiot Avenue jail site.

On the Gratiot site, Rock Ventures proposes building a $1 billion commercial development that would include a Major League Soccer Stadium in partnership with Detroit Pistons owner Tom Gores.

The county halted work on its 2,000-bed Gratiot Avenue jail project in June 2013 when it became clear it was on pace to run tens of millions over its $300 million budget.

Wayne County Executive Warren Evans, after stabilizing the county's finances, was set on resuming construction of the jail this year.

But Gilbert is now proposing to build a new, $420 million complex at East Forest Avenue, east of I-75, about 1.5 miles north of the Gratiot Avenue site, using the county's $300 million and his own funds.

"Rock Ventures is prepared to build the County a new, high-tech criminal justice complex (estimated cost of $420 million) for the same $300 million, in exchange for the transfer of the Gratiot Avenue property and a credit for the savings a new consolidated criminal justice complex will provide," the company announced.

Gilbert has long pushed to purchase the downtown jail project site, which sits near the county's courthouse and juvenile detention center, with the goal of building an entertainment complex there.

"We have worked hard to develop and deliver to the County a proposal that, we believe, will be the best long-term outcome for the County and for the future of downtown Detroit," said Matt Cullen, principal of Rock Ventures. "Specifically, we will deliver to the County a modern, consolidated criminal justice center with no risk and at the same dollar amount they estimate it would cost them to complete the project on Gratiot."

The county acknowledged receiving the proposal, but didn't comment further.

"Today, the county received a proposal from Rock Ventures as an alternative to completing the jail at Gratiot," said Jim Martinez, Wayne County communications director. "We will withhold further comment on the offer until we've had the opportunity to review it."

Rock Ventures' plans for the Gratiot Avenue site include parking, office, commercial, hotel and residential space.

Rock Ventures Wayne County Jail Cost Savings Proposal by MLive.com on Scribd