Plans to re-site a tennis court in the grounds of Anmer Hall, on the Sandringham Estate, have been approved by West Norfolk Council.
Notification of the decision was issued by the authority yesterday.
The project is the latest phase of the renovation of the house, which was given to the Duke and Duchess of Cambridge by the Queen.
The application, which was first submitted to the authority in June, sought permission for the re-siting of the tennis court.
The scheme also allows for the reinstatement of a garden area and parking, plus the construction of new iron fencing.
No objections were lodged either by residents or public bodies who were consulted during the assessment process.
National media reports have suggested that the scheme could cost up to £60,000 to complete.
It is also estimated that around £1.5 million has been spent on renovating the building.