Washington homeowners could face tens of thousands of dollars in costs to convert natural-gas homes to electric after the Washington Supreme Court struck down the voter-approved initiative designed to protect natural gas as an energy option. The Building Industry Association of Washington has estimated that converting an existing natural-gas home to all-electric can cost approximately $40,000, depending on the home and upgrades required. Conversion can involve replacing gas furnaces and water heaters, installing electric appliances, and upgrading electrical panels and wiring. The court’s ruling does not itself require homeowners to convert to electricity. Rather, it eliminates Initiative 2066, which restricted...