A person who has disobeyed building bylaws can he ask others to follows building bylaws

This discussion questions whether an individual who has themselves violated building bylaws can seek legal enforcement of those same bylaws against a neighbour. The neighbour in question built their house, contravening setback rules, which subsequently blocked light and air to their own property. Now, the neighbour is suing to enforce bylaws, claiming their own light and air will be blocked if the other party doesn't comply. The core issue is whether a 'wrongdoer' can claim relief by asking others to follow rules they themselves have broken.