Assistant District Attorney Anna Ferguson said 41-year-old Kurt Schoemig was charged Monday with two counts of involuntary manslaughter.
She said in a statement he "played a substantial factor" in causing the deaths of 69-year-old Albert Senzatimore of San Jose and 57-year-old Gary Trovinger of Los Gatos at Trovinger's home in Tahoe Donner in October.
Ferguson said Schoemig, president of Cedar Ridge Builders, didn't have the necessary permit for work done last year.
Police say an employee cut a furnace exhaust pipe, but the project wasn't completed, leaving the pipe to vent into the home when the heater started.
After a dramatic drop in Stockton's homicide rate over the last couple of years, the violent death numbers are going back up again.
The City of Sacramento Police Department says the crime rate has dropped significantly for the second year in a row. The police chief credits more community involvement.
Hit-and-run collisions could soon trigger a community alert to track down the fleeing drivers, under a bill now in the California legislature.
Police say they've made several arrests in connection to a possible social media threat made against Rocklin High School.