NZ Government API & Open Data Portal

The Facts

api.govt.nz is the New Zealand government's central API catalog, listing publicly available APIs from across central and local government. data.govt.nz is the companion open data portal, hosting downloadable datasets from agencies including Stats NZ, LINZ, MBIE, councils, and crown entities. Together they hold thousands of property-relevant resources — zoning, hazard maps, demographic data, transport networks, building consents, rental bond data — most accessible without an account. Some APIs require a key and a developer agreement. Coverage is uneven by agency; some publish actively, others rarely.

A Developer's Take

Bookmark this if you do any quantitative work on NZ property.

Api.govt.nz is the central catalog of NZ government APIs. Data.govt.nz is the open data portal. Together they cover every dataset you'd otherwise scrape or manually download. LINZ titles and parcels. Stats NZ building consents and population. MBIE rental bond data. RBNZ statistics. Companies Office. Most are free. Some require registration.

For most developers this spoke is overkill, but for anyone running their feasibility analysis in Excel or Python on a recurring basis, the time saving is real. Once you've connected the Stats NZ Infoshare API, the LINZ WFS feed, and the MBIE bond data CSV pipeline, you can rebuild your feasibility models to pull live data automatically rather than re-downloading every month.

The other use: a discovery layer. If you're looking for a specific dataset and don't know whether it exists or where it lives, search api.govt.nz and data.govt.nz first. Saves hours of Googling.

Where it falls short: APIs documentation quality varies wildly. LINZ and Stats NZ have professional API docs. Some smaller agency APIs have minimal documentation and you're figuring it out from trial and error.

If you're a non-technical developer this isn't where you'd start. If you're the kind who'd rather automate the boring bits, this is the bookmark.

A broad understanding of APIs is becoming more essential as this is how AI talks to databases of knowledge. Government has a wealth of knowledge and they've already made it queryable to those that understand how to access it. This can provide a wealth of information other developers are not yet accessing because government websites are not always so user-friendly and rely on slow manual queries.

When to use this

Use the API and open data portals when you want to automate something you currently do manually — pull suburb statistics into a feasibility template, monitor consent volumes by month, plot rental bond data over a heatmap. Also useful for one-off research where the answer needs structured data rather than a council PDF. Start at the data.govt.nz catalog page rather than guessing — it'll point you to the API or downloadable file faster than landing on any individual agency site.