Below are potential customer contributions/costs for bringing natural gas to their home in Oregon and Washington. In order to determine the accuracy of these estimates, NW Natural looks at items such as jurisdictional requirements, current construction conditions, building size, anticipated gas usage, number of occupants, and appliances installed. Changes that are unanticipated may impact the final customer contribution costs after a on-site review. Estimates may vary for each customer based on the above requirements, and do not include the cost of appliances.