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.
Stockton Police have increased street patrols in several neighborhoods in Stockton after a wave of gun violence during Memorial Day weekend.
The California Supreme Court struck down state-wide restrictions on where sex offenders may live.
Suspect #1: Hispanic or White male adult, 5 feet 2 inches tall, 170 pounds, medium build, wearing an orange vest and hard hat. Suspect #2: Hispanic or White male adult in his mid-30s, 6 feet tall, heavy set, wearing an orange vest and hard hat.
The possession of a date rape drug could once again be charged as a felony under a newly-introduced bill in the California Legislature. The measure would reverse a provision of Proposition 47, which voters approved last fall.