Explore the history of First Addition in Lake Oswego, from its 1888 roots as an Oregon iron town to one of Lake Oswego's most walkable and desirable neighborhoods. First Addition in Lake Oswego, Oregon - Established in 1888 From Oregon’s Iron Town to One of Its Most Coveted Neighborhoods Today, First Addition in Lake Oswego, Oregon, is known for tree lined streets, charming older homes, hidden alleys and the ability to walk into downtown Lake Oswego. But the neighborhood wasn