Before any building can take place, you may need to secure a permit and planning permission for your home extension. Although planning permission and permit laws differ across Canada, it is likely that you will always require a form of planning permission for an extension on your home. When you hire an experienced building contractor, they will have a good understanding of local building requirements and will be able to advise you on your unique situation. Generally, you’ll need a permit if you’re adding an extension that is larger than ten meters squared, if you are constructing attached or detached garages, or making any other structural changes. Don’t forget to budget for the charge of submitting your planning permission application to your local authority too!