There are concerns over a new building code being developed by the federal government that targets energy efficiency.
According to the Globe and Mail, the new rules would likely require home owners to upgrade their home when they are selling or renovating to cut down on greenhouse gas emissions.
The code is expected to be completed by 2022.
A quarter of Canada's greenhouse gases currently come from residential and commercial buildings.
Real estate experts are concerned about the proposed changes, saying it could change the dynamics of home buying and selling.