The average single-family home will see a property tax increase of $80 to $3,691, after Braintree officials approved a new tax rate this month that will take effect in February. Town officials also chose to continue a split tax rate requiring commercial taxpayers to pay a higher rate than homeowners. The average projected commercial/industrial tax bill will be $44,317, an increase of $3,672. Though the burden on businesses may be high, Town Council President Chuck Kokoros said the split makes sense, especially considering how much it saves residential taxpayers. “We’re fortunate that even at this rate . . . we still have growth going on in Braintree because of [our] location,” Kokoros said. Braintree officials noted that the average annual tax increase for single-family households since the change of Braintree’s government in 2008 was $85.79. By comparison, the average annual increase on the same property in the four years before the change in government was $143.25.