Understanding Permits

As a homeowner, you are not legally permitted to perform your own renovation work, with the exception of the electrical, but it is strongly recommended amateurs not do this as disastrous results can occur.
You are legally responsible for obtaining any building permits required. However, your renovator should look after this on your behalf, specifying which permits are required and who will get them. You will need to provide a letter of authorization before your renovator can apply for a permit for your renovation.
A reputable contractor hires licensed trades to do your work.
Any structural, heating, plumbing, electrical, gas or sprinkler changes require a building permit from the City. Avoid any contractors or designers who tell you otherwise. They must have a Building Code Identification Number to apply for a building permit.
A permit is for your protection. Permits are based on building codes to promote health and safety, and structural integrity.  Some minor cosmetic changes may not require a permit. Confirm with your renovator or check with your municipal building permit office to be sure.
When do I need a permit?
Generally, a building permit is required for renovations that involve changes to the structure or systems of your home.
Types of Permits
Whether you are building or renovating your home, there are basically five types of permits that may be required.
Building Permits
Permits may be required for many repair, renovation and addition projects in existing homes.
Renovating a Strata Lot
If you own a condominium or a townhouse, you may be subject to your strata bylaws and restrictions.