The streaming giant will own and control works like Charlie and the Chocolate Factory and Matilda.
The deal means the streaming giant will own creations like Charlie and the Chocolate Factory and The BFG.
Netflix will control what happens to them in publishing as well as TV and film – and receive the royalties.
It will also create numerous spin-off games, stage shows and other live experiences. Neither side would reveal how much the deal is worth.
The takeover means The Roald Dahl Story Company – which is run by Dahl’s grandson Luke Kelly and was previously owned by the family and other employees – will now become a division of Netflix.
It earned £26m revenue from the author’s work in 2019, according to its latest accounts.
In a joint statement, Mr Kelly and Netflix boss Ted Sarandos said they were “joining forces to bring some of the world’s most loved stories to current and future fans in creative new ways”.