Work will begin next month on the $30 million (£15.2 million) project which will involve the construction of a new premium check-in pavilion.
An exclusive check-in area for Club World and Executive Club Silver passengers will also be built and the airline plans to renovate its existing First Class and Concorde Lounges.
BA plans to model the lounges on the ones now in operation at Terminal 5 in London Heathrow after the airline relocated its services to the new development earlier this year.
The work is due to coincide with the launch of several new routes from Europe to JFK, explained BA's executive vice president of the America's Robin Hayees.
He commented: "The redevelopment project is perfectly timed as British Airways plans to expand the number of flights to the UK as well as launch, this June, its new OpenSkies airline operating flights to Paris and New York."
For more cabin choices, first select specific cities and travel dates.
We make every effort to ensure the price you see on Skyscanner is the price you pay with the airline.
Prices on Skyscanner always include an estimate of all mandatory taxes and charges. The final price you pay for your tickets may vary as a result of additional options offered by the airline, such as luggage allowances or travel insurance.