Sportal.co.nz 17.Oct.2013Getty Images
Woodcock, only the second player to make 100 appearances for the franchise, and who has played 104 Test matches said: "I'm really looking forward to moving home and being closer to my family.
"I want to finish off my rugby at the Blues where it all started so I'm excited to head back and re-join the team."
Blues coach Sir John Kirwan said he was thrilled to welcome Woodcock back.
"We're trying to build a lasting franchise so we've got a lot of young guys and to have someone with his experience is fantastic.
"I see him as one of our people. He's had his OE and now he's back so I think he'll add plenty of value to this team."
The Blues squad for next season will be announced on October 30.