[4] In the September 2006 by-election held in the district of Marie-Victorin, Projet Montréal candidate and former city councillor Kettly Beauregard won 31.7% of the vote, for a second-place finish.

[5] In December 2007, candidate Jean-Claude Marsan [fr] took second place with 37.43% in a by-election to replace disgraced Outremont borough mayor Stephane Harbour.

[7] In April 2012, Érika Duchesne won a by-election in the Vieux-Rosemont district of Rosemont-La Petite Patrie, giving Project Montréal its 11th seat on city council.

[8] In the 2013 Montreal municipal election, Projet Montréal doubled its number of seats within city council, going from 10 to 20 and becoming the official opposition against Denis Coderre's team.

One of the party's proposals consists of building light rail in order to do the following: Projet Montréal's 2009 platform elaborates commitments for seven major aspects of urban living:[13] Victories are indicated with bold fonts.