By the third year, rates will be up an average of 12%.
The average residential customer's $83.60 monthly bill up to $87.23 in the first year, $90.71 in the second and $94.11 in the third.
Westchester customers will see rates go up 4.2% a year for the next three years.
There is some good news, however.
Customers will also receive a proportional share of a $36.4 million one time credit this summer. The refund amount for an average customer will be about $5.35.
Additionally, they will also get future customer benefits totaling $54.7 million.
The new increase takes effect next month.
It is 22% lower than Con Ed requested last year. The utility said 23% of the rate hike will pay for higher property taxes, 7% for other taxes, and 17% for pension costs.