Everyone is talking about the new granny flat rules, and with good reason. But there is another set of planning rules that has been quietly reshaping what New Zealand homeowners can do with their land, and many people still do not realise just how much opportunity it creates. The MDRS rules many NZ councils have adopted allow more homes to be built on standard residential sites without the long, expensive consenting processes we were used to.

This article explains what the Medium Density Residential Standards actually allow, what they do not change, how they compare with the granny flat rules, and why transportable homes are particularly well suited to making the most of them.

The Medium Density Residential Standards NZ, which many councils apply, usually shortened to MDRS, have been in place for a few years now. In most MDRS zones, you can build up to three homes of up to three storeys on a standard residential site, provided you meet the key standards for height, setbacks, outdoor space, and outlook.

The significant change is in the consenting pathway. If your design fits within the rules, you can access a faster consenting process rather than the lengthy and expensive resource consent journey that adding extra dwellings used to require. For many homeowners and investors, this opens the door to opportunities that simply were not possible a few years ago.

For our clients, MDRS can mean more flexibility in how a site is used, better options for multi-unit builds or future development, and faster consenting where the design fits within the standards.

MDRS is not a free-for-all, and it pays to understand the limits before you start planning.

Every site is different, and councils still apply specific controls around stormwater, infrastructure capacity, and natural hazard risks. A site that qualifies on paper may still face constraints once these factors are assessed. Private covenants on your land are not overridden by the standards either, so it is worth checking your title before getting too far into planning.

This is why the early stages of our process matter so much. Before any contract is signed, we complete the engineering, surveying, and council discussions needed to confirm exactly what can be built on your specific site. You can read about how that works on our process page.

These two sets of rules are often confused, and they solve different problems.

The granny flat rules relate to a single minor dwelling. From early 2026, you can build one self-contained home of up to 70 square metres on many residential and rural properties without a building or resource consent, provided conditions are met, including Building Code compliance, a simple single-storey design, and construction by or under the supervision of a Licensed Building Practitioner. If you are researching minor dwelling NZ rules, that pathway suits adding one compact second home to your section.

MDRS operates at a larger scale. Rather than one small dwelling, it allows up to three homes on a qualifying site, with no 70 square metre size cap on each home. If your ambition is a second full-sized family home, or two additional rental dwellings, MDRS is the framework that makes it possible.

The two can serve very different goals. A family wanting space for elderly parents might use the granny flat pathway. An investor wanting to significantly grow a rental portfolio on a single large section is far more likely to be working within MDRS.

There are several reasons transportable buildings NZ-wide are a natural fit for medium-density projects.

First, the compact footprints. MDRS sites need homes that respect setback, outdoor space, and outlook standards, and our range includes designs from 60 square metres upwards that are specifically suited to infill housing and secondary dwellings. You can explore the full line-up on our plans page.

Second, the build happens off your site. If you are adding dwellings to a section that already has a home on it, months of on-site construction is disruptive for everyone living there. Because an Exeter home is built in our Rotorua yard and delivered complete, the disturbance on your land is limited to site works and delivery rather than an extended construction period.

Third, fixed pricing. Multi-dwelling projects live or die on their numbers. A fixed-price building contract gives you certainty on the largest cost in the project before you commit.

Fourth, speed. For a standard Essentials or Essence range home, the build typically takes around 15 weeks from consent to delivery, and because your site works can progress at the same time as the build, the overall project timeline is far shorter than constructing additional dwellings on site one after the other. For an investor, that means rental income starts sooner.

Fifth, rental compliance. If the additional dwellings are destined for the rental market, our Essentials range is built to meet the Healthy Homes Standards as well as the Building Code, which means the homes are rental-compliant from day one with no upgrades needed down the track.

Finally, flexibility with the existing home. If the current house is not in the ideal position on the section, it can be moved to the front or back of the site to free up space for additional dwellings. We have helped clients significantly increase their rental portfolio by adding two homes to a site where only one existed previously.

Site size matters. In our experience, multi-dwelling projects under MDRS work best when the land is 800 square metres or larger, and sites of 1,000 square metres are ideal. That gives each dwelling room to meet the outdoor space and outlook standards comfortably while keeping the project practical for delivery and site works.

Lending is an important practical consideration. Most banks will treat three homes on one site as a standard residential investment. Once you push to four dwellings, you are usually shifted into commercial lending, which is a very different process.

Many of our clients fund these projects using existing equity and when-complete valuations, and we are happy to share what we have learned from past projects. That said, we are not financial professionals, so please speak with a licensed financial adviser before making lending decisions.

If you are weighing up an MDRS project, here is how it typically unfolds with Exeter Homes.

It starts with a conversation about your section, your goals, and your budget, after which we can give you a realistic ballpark for the project. From there, the concept design stage shapes the homes themselves, and we arrange a geotech report so we understand exactly how your land behaves.

The preliminary stage is where an MDRS project earns its certainty. Our structural engineers design the right foundations, surveyors confirm boundaries and dwelling positions, and we work through the council discussions, stormwater design, and compliance checks that determine precisely what your site can support. By the end of that stage, your project is fully and accurately priced, with no assumptions and no grey areas, before you sign a fixed-price building contract.

While your homes are built in our yard, the site works run in parallel, and once everything is ready, the homes are delivered, positioned, and connected.

Even within MDRS, your project still involves council. The consent for building your home in our yard is handled by us, and the local consenting requirements for your site are worked through during the preliminary stages of our process, alongside the engineering and surveying work that confirms what your land can support.

If you have questions about how consents work for a transportable home, our FAQs page covers the two-consent structure, typical timeframes, and the reports councils commonly require.

If you own a larger residential section and have wondered whether it could hold more than one home, the medium density rules may have already answered that question in your favour. The starting point is an assessment of your specific property.

Get in touch and we can assess your site, talk through your options, and help you plan the best path forward. Call us on 0800 613 213, email sales@exeterhomes.co.nz, or reach us through our contact page. We would love to help you make the most of what your land allows.