Planners have given the go-ahead for improvements to the TT winners' enclosure at the grandstand.
The Department for Enterprise's motorsports team applied for permission to extend and resurface at the area southwest of the main Grandstand building.
A planning officer said although a grassed area would be removed, it was relatively small and the development would benefit racing without having an impact on Noble's Park.
Planners voted to approve the scheme.
Castletown hosts tin bath racing
Mountain Road closed for skateboarding today
Peel ready for huge community sale later
Cruise ship makes first stop of week
Tin bath races mean bus diversions tomorrow
MHK wants backing for changes to Tynwald members' pay
Storage firm announces closure
Mountain Road shut for skate setup later