The Blake mansion is huge and has a beautiful garden and a driveway. Daphne told Fred Jones they have only two maids, a butler and a groundskeeper.
Scooby-Doo! The Mystery Begins
It's where they took the groundskeeper's van to to head to Vice Principal Grimes's home. Daphne explained that the groundskeeper's van would become her new car once she turned 16, while her family would be getting the groundskeeper a new car.