With the help of St Anthony's trust, now owned by the Society of St Pius X, the church now has a $20,000 plan for new buttresses and ties.
An engineer and architect worked together to come up with a solution that fitted the congregation's needs, while respecting the church's architecture.
"That's what should happen in all cases. It's not a cheap process but you can get Lottery funding. In some ways, they're showing the way for the others," Miss Pettigrew said.
She had been worried about the preservation of historic churches even before earthquakes shook the matter into life.
The Historic Places Trust had more than 3000 registered buildings and about a quarter of them were churches. They were important for their age, their architecture and also the store people set by them.
They have been likened to the Pakeha version of marae.
There were now too many churches for the number of worshippers, particularly in the mainstream religions. The key to keeping the buildings was to give them other uses, Miss Pettigrew said. That was already happening in England.
"The view from there is that churches have to have a wider community use, rather than just being open for one hour on Sunday."
Church committees now needed to decide whether to keep the buildings in their ownership.
One Anglican bishop in Paekakariki took the initiative of gifting a local church and hall to a community trust.
The hall was now getting lots of community use and the church was still open for worship, with the congregation no longer paying to look after it.