The price tag for adding massive canopies and making other improvements to the curbside at Hartsfield-Jackson International Airport is heftier than first expected, with airport officials seeking approval for another $102.5 million in costs.

The original amount for a contract with New South-McCarthy for terminal modernization work including the canopies was $163 million, approved in late 2015.

But as airport planners and contractors reviewed plans for the canopies, the plans got more complex, the scope of the work grew — and the cost increased substantially.