The New Zealand government will pay the lion's share - $NZ2.9 billion ($A2.46 billion) - of a host of projects to help earthquake-hit Christchurch rebuild.

The city's council will stump up the remaining $NZ1.9b ($A1.61 b) of the $NZ4.8b ($A4.07b) bill.

Timelines and designs for the projects will be announced progressively over the coming months, says Canterbury Earthquake Recovery Minister Gerry Brownlee.

The major component of the costs is the repairs and rebuild of underground infrastructure - such as water, power and sewers - which will be $NZ2.94b ($A2.49b).

The government will provide $NZ1.8b ($A1.53b) and the council the rest.

Mr Brownlee says the costs are indicative and will be the subject of competitive tenders.

The government will pay the complete $NZ421 million ($A356.98 million) cost of residential, commercial and green space development, called The Frame, in the central city as well as $NZ284m ($A240.81m) for a new convention centre complex.

The council will fund the bulk of the $NZ290m ($A245.90m) for a new stadium.