Lydd Airport bosses says they will now be seeking an early meeting with Shepway District Council planners to begin the process of ensuring that the pre-commencement conditions are discharged, including environmental, noise, traffic and other conditions already agreed as part of the approval.
Managers at Lydd Airport say they will waste no time in pressing ahead with upgrading the site.
Their £25m investment plans include the construction of a 294m runway extension and a 150m starter extension plus a new terminal building capable of handling up to 500,000 passengers a year.
Lydd Airport Executive Manager Hani Mutlaq said the Government's decision was a "victory for common sense and for the people of Romney Marsh.
The Leader of Shepway Council, Cllr Robert Bliss, said he was delighted with the Secretary of State’s decision to approve plans for a runway extension and new terminal building at Lydd Airport.
The Lydd Airport Action Group has been campaigning against the expansion of the airport.
Louise Barton told ITV News it would continue to fight the plans and expected the proposal now to be embroiled in years of legal wrangling.
"The whole nuclear safety argument has been completed disregarded," she said.
The go ahead's been given to expand Lydd Airport.
The scheme was dubbed one of the most controversial projects in the South East.
Management at the London Ashford International airport at Lydd wanted to extend the runway and build a new terminal building to cater for half a million passengers a year. But campaigners said it would devastate the local environment.
Breaking: An announcement about plans to expand Lydd airport In Kent is expected to made by the Secretary of State at 5pm. The proposals, which divided locals, have been under consideration for years, leading the government to call in the decision.