Montreal's auditor-general has uncovered irregularities in construction of several residential developments on Nuns' Island.
The report was obtained by the Journal de Montreal.
It says a faulty system for processing permit requests, lax enforcement and cozy relationships with city managers allowed real estate developers to bend the rules.
In one case, construction of a highrise started before the proper permits were issued. That tower ended up being three storeys higher than originally approved and its footprint on the site was illegally large.
Another complex was supposed to have an underground parking garage but the structure was eventually built above-ground.
"Any of the insinuations need to be seen in their contexts to understand how they evolved," Samuel Gewurz, the president of Proment, one of the developers mentioned in the report, said.
"We went to get permits, we worked fully under the law. During the course of construction the city determined one part of regulations had to be adjusted, as a result we were off pace for a certain period of time, but everything that we have built conforms to the law," he said.
The report was written last year and is now in the hands of anti-corruption investigators.
Gewurz says they have not contacted him.
The Verdun borough will be holding a press conference on the issue at 1 PM Monday.