When the tremors return, residents at one Christchurch rest home band together with cups of tea and company.

At least 22 commercial properties and 50 homes in the small quake-damaged North Canterbury town of Kaiapoi have been deemed unsafe, with its mayor admitting the town is changed forever.

Most schools in the quake-devastated Canterbury region are not likely to open until Monday, the Education Minister says.

The final bill for the Christchurch earthquake may reach $4 billion, almost double initial estimates, Treasury Secretary John Whitehead said afternoon.

Aftershocks are continuing to hit Canterbury with one measuring 4.1 the latest in a series today that also included a 5.1.

Mayor Bob Parker says Christchurch city is coping "amazingly well" with the continuing fall-out from Saturday morning's earthquake.

The Government has set aside $2.4 million for trauma counselling for Christchurch earthquake victims, Paula Bennett says.

Stricken homeowners and workers will start receiving compensation and emergency payouts within days as Christchurch's earthquake bill threatens to exceed $2bn.

Rebuilding up to 100,000 damaged and destroyed homes in quake-hit Canterbury could take years, a building executive says.

The Christchurch earthquake is expected to provide a much-needed lifeline for NZ's beleaguered construction sector.

Allan Hubbard believed his self-righteous hype - sadly, so did we.

Christchurch was "inevitably going to be brought to its knees" by an earthquake because of the nature of the ground it stands on, a scientist says.

"It's essentially a ghost town. You can see utter devastation," said Prime Minister John Key.

The Govt has announced details of a new 'Savings Working Group' designed to come up with ideas to improve NZ's savings record.

Legislative roadblocks hindering the efficient operation of public-private partnerships are being removed, writes Michael Weatherall.