Douglas is one of the best equipped schools in Ireland with
- Science rooms (Physics, Chemistry and Biology)
- Mathematics rooms
- Language rooms
- Business rooms
- Geography room
- Practical studies rooms (Engineering, Construction Studies, Woodwork and Technology)
- Religion room
- Library
- Careers Library
- Special Tuition room
- Art rooms
- Three Computer rooms
- An Oratory where students may reflect and pray in peace and quiet.
Sports facilities
The school is also well equipped for all sports.
- Two grass playing fields
- Three all-weather playing pitches
- Two tennis courts
- A large multi-purpose sports hall