Camden Council has ordered him to remove the new paving, which was installed without planning permission.
Corden, best known for Gavin & Stacey and The Late Late Show, bought the £11.5 million home in 2024.
Last year, he paved over part of the front garden to make a bin store, without planning permission.
Planning papers say shrubs were removed and about 18 square metres of the front drive was covered in concrete slabs, wiping out about seven square metres of flowerbed.
Corden has since applied retrospectively for permission to keep the changes.
His agents said it was repair work to existing paving and needed for day-to-day household use.
Planning officers rejected the application in November.
They said the work broke local rules against paving over front gardens and offered “no public benefits.”
Officers also said the changes would harm the look and character of the conservation area.
Corden was told to remove the paving and put the garden back by early January or face enforcement action.
But he has appealed, putting the deadline on hold until a decision is made.
There is no date yet for the appeal decision.
The Belsize Society objected, warning about environmental harm.
A spokesman said losing greenery would cut biodiversity and criticised the use of “mass-produced industrial materials.”
Councillor Tom Simon also objected, saying there was “no valid justification” for the loss of green space.
Another resident warned it would set a damaging precedent for future planning bids in the area.
It is not the first planning row Corden has faced since moving into the area.
Last year, several residents objected to his plan for a gym-and-spa outbuilding in the back garden.
Neighbours raised noise fears, but the council granted a certificate of lawful development for the structure.
Corden has also put in a balcony and spiral staircase at the back of the home.
Corden also reportedly ditched plans for a country retreat after selling his £8.5 million mansion near Henley-on-Thames.
The modernist home, bought in 2020, got planning permission for a redevelopment in 2023 but nothing happened.
The house later fell into disrepair, and online footage showed it had been extensively vandalised inside.
Corden lives in the four-storey home with his wife, Julia Carey, and their children.
The appeal result will decide whether he must remove the paving and return the garden to how it was.
