The head of the Canterbury Anglican Diocese is delighted by the decision to reinstate the ChristChurch Cathedral.

The 225 member synod voted to reinstate the cathedral today, after three days deliberating.

Bishop Victoria Matthews said it was a healthy majority of around 55 percent that favoured the decision.

"I am delighted we've made a decision and I had told the synod that whatever they decided I would back them 100 percent and that's exactly what I do," she said.

The decision means the church accepts the government's grant of $10 million and a $15 million suspensory loan.

This also includes a $10m grant from Christchurch City Council which is subject to public consultation and fundraising, and a $13.7 million pledge from Great Christchurch Buildings Trust.

The Bishop said she is delighted by the decision, but warns a fit for purpose cathedral could take ten years to complete.

Christchurch Regeneration Minister Nicky Wagner is hopeful for a slightly earlier finish date.

"Well I'm terrified to say anything quicker, but they talk 5-7 years. I think if we can get on with this, if everybody gets behind it I think we can make that happen."

Wagner said she expects people to start restoration work on site by Christmas.