Each property in the City of Campbell River has specific zoning regulations which regulate setbacks, building heights, lot coverage, permitted uses, etc. Check the zoning map for the existing zoning of your property and then check the Zoning Bylaw to find the regulations for that zone. See Bylaw 3250 for zoning regulations.
See 
CityMap for zoning on individual properties.
For more information on Bylaw 3250 refer to Searchable Bylaws on the Home Page of this site and check Current.