Christchurch was created by the British, so many of the early buildings were stone or brick to remind the colonizers of their home country. Many of these buildings had severe damage.
The residents found incredible creative ways to have life take a normal feel, even though it is clear the city is still mostly not normal. They say it will take another 10 years or so before all the cracks in the roads are repaired. And they still have not made decisions about some historical buildings about the cost vs. benefit of demolish or repair.