Infill Housing with Modhaven: A Smarter Second Dwelling
Infill housing is one of the fastest-growing trends in New Zealand. More people are seeing the value in adding a second dwelling to their property, and with new rules on the horizon, it is about to get even easier.
Why add a second dwelling?
- A home for aging parents. Keep loved ones close while still giving everyone independence.
- Space for adult children. Provide a stepping stone without the cost of buying their own place right away.
- Passive income. Rent out the extra home for steady cashflow or short-stay accommodation where allowed.
- Boosting investment value. Buy a property and add a compliant second dwelling to increase both yield and long-term capital gain.
- Less disruption at home. With Modhaven’s off-site construction, the second dwelling arrives nearly complete. That means fewer trades, less noise, and less mess for those already living in the main house.
The 70 m² rule change
The Government is progressing new regulations so small standalone homes up to 70 m² can be built without building consent. Councils will also be required to permit them in most residential and rural zones without resource consent, as long as certain conditions are met.
This exemption is expected to come into effect in early 2026. Until then, normal consenting still applies. But you can start planning now by reviewing your site and exploring design options.
What the exemption requires
- The dwelling must be 70 m² or smaller, single storey, and meet the Building Code.
- Work must be carried out or supervised by a Licensed Building Practitioner (LBP).
- You will still need to notify your council before and after construction, usually through a PIM (Project Information Memorandum). Councils can apply development contributions at this stage.
- The dwelling must meet setback and height limits and be a standalone structure with suitable services connected.
What to check on your site
Even with the exemption, not every property will automatically qualify. Before moving forward, think about:
- Services. Is there capacity for water, wastewater, stormwater, power, and data?
- Access. Can a truck and crane reach your section for delivery and installation?
- Ground conditions. Are there natural hazard overlays or geotech requirements? Are there existing underground services that might need to be relocated or worked around?
Zoning. Each council has an online GIS map or property search where you can check the zoning of your site. Many areas now allow more than one dwelling where it was not possible before. If you are not sure, we can help you interpret your zoning and understand what it means for your property.
Why choose Modhaven?
Adding a second dwelling is not just about ticking a box. It is about creating a space that is high-quality, healthy, and built to last.
- High-performance living. Our homes are designed for low energy use, reduced heating costs, and year-round comfort.
- Customisable designs. Start with one of our proven plans and tailor the exterior, layout, or interior fit-out to suit.
- Hassle-free build. Off-site construction means you avoid months of disruption, and your new home arrives ready to install.
Finance-ready. We supply the documentation lenders require, and banks such as Westpac now offer lending products designed for prefabricated homes.
Bottom line
Whether it is providing a warm, safe space for aging parents, helping your kids into housing, or creating a new stream of income, an infill Modhaven dwelling is a smart way to make your section work harder.
The 70 m² exemption will make this even faster and easier, but it pays to prepare now. Review your site, explore your options, and be ready to move when the new rules come into force.
Want to talk about adding a second dwelling to your property?
We are free to discuss your project at any stage. Contact us here.
