Why is Auckland's housing capacity not the same as homes that get built?

Plan-enabled capacity is the number of dwellings that zoning rules would allow if every suitable site were developed to its maximum permitted density. It is a theoretical ceiling, not a construction forecast or a council commitment to build.

Plan Change 120, Auckland Council's housing intensification plan change, is required by the National Policy Statement on Urban Development to provide development capacity for approximately 1.4 million homes. Cabinet revised this figure down from a previous target of 2 million.

Auckland completed about 18,100 new homes in 2023 and 17,200 in 2024 — the highest levels on record. These are completion figures from Auckland Council, not consent figures, which are a separate and higher leading indicator.

At those completion rates, it would take roughly 75 to 80 years to build out the 1.4 million-home capacity — assuming the rate held constant and every suitable site were developed, which it will not.

Five factors determine how much plan-enabled capacity converts to actual homes:

• Land availability: zoned land may be held by owners unwilling to sell or develop.
• Infrastructure: water, wastewater, transport and power must precede or accompany development.
• Financing: developers need capital and pre-sales to proceed.
• Construction capacity: labour and materials limit how fast dwellings can be built.
• Market demand: dwellings are built when buyers or renters are willing to pay.

PC120 changes what zoning allows. It upzones areas near rapid transit corridors and town centres, increasing the permitted density of housing. This is necessary to enable growth.

PC120 does not by itself deliver infrastructure, finance construction, or create market demand. Enabling capacity is a prerequisite for housing supply, not a guarantee of it.