A hundred homes have now been completed in Auckland's first special housing area.

Mayor Len Brown and housing minister Nick Smith today planted a tree as the area takes route at Waimahia in Manurewa, South Auckland.

The development, under the Auckland housing accord, will create about 280 new dwellings and should be completed by 2017.

It features a mix of housing types and includes 3.7 hectares of parks and reserves.

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"Waimahia is being built on Crown land, consented by Auckland Council and provided by iwi and other community housing trusts - a great example of how true collaboration works," Mr Brown said.

"The fact that we now have 100 homes completed there is a significant milestone in what is a shining example of what can be, and will continue to be, achieved."

Overall, nearly 100 special housing areas have been established and 2000 homes consented. The target for consented sites or dwellings over the course of the housing accord - September 2013-2016 - is 39,000.