Mattamy Homes, the leading real-estate developer, is quietly shopping around a development proposal for the 12 acres of Toronto’s waterfront known as the Quayside, with a meeting planned with the Ontario government this week, The Logic has learned.

This is Mattamy’s second proposal for the waterfront. The company was part of a consortium—which included OMERS and Manulife Financial—that responded to a Request for Proposals (RFP) for Waterfront Toronto’s Quayside development that Sidewalk Labs won.

Respondents were given only six weeks to complete the complex RFP, which Ontario’s auditor general said gave Sidewalk Labs an edge because it “received more information” than the other bidders. The new Mattamy Homes proposal outlines what the Quayside RFP could have looked like if the other bidders were given more time, according to a source familiar with the project. The source also claimed that Mattamy isn’t trying to overturn the Sidewalk Toronto plan.