Smart Housing Solutions builds every home using the same Coloursteel EPS panel system, but offers two spec levels on eligible models - Economy and Passive. The two ranges look similar from the outside, but the difference in build spec is meaningful, and it matters for how the home performs long-term.
This guide explains what actually changes between the two ranges, what each is best suited to, and how to decide which one is the right investment for your situation.
What Both Ranges Have in Common
Every Smart Housing Solutions build - Economy or Passive - uses the same core construction system. That means 100mm insulated Coloursteel EPS wall panels, a steel chassis, NZ Building Code compliance, and the same workshop-built quality standard. The kitchen, bathroom, wiring, plumbing, and fit-out spec are consistent across both ranges.
This is important. The choice between Economy and Passive is not a choice between a good build and a bad one. Economy is a genuinely good build. Passive is an upgraded version of the same good build, with specific improvements aimed at thermal performance.
What Changes with Passive
The Passive range upgrades two things - the roof insulation and the glazing.
Roof insulation on Economy builds is 150mm. On Passive it steps up to 225mm. That is a 50 percent increase in the depth of insulation between your ceiling and the outside air. Roofs are where a lot of heat is lost in a poorly insulated home, so upgrading the roof is one of the highest-impact things you can change.
Glazing on Economy builds is single-glazed as standard, with double glazing available as an upgrade. On Passive builds, double-glazed aluminium joinery is standard. Windows are the other main pathway for heat loss in a home, so upgrading to double glazing is the natural companion to upgraded roof insulation.
Both upgrades work together. Upgrading only the roof, or only the glazing, gets you a partial gain. Upgrading both together is what makes the Passive build noticeably more thermally comfortable than the Economy build.
What Passive Feels Like to Live In
The practical difference between Economy and Passive is that a Passive home is warmer in winter and cooler in summer, with less reliance on active heating and cooling to stay comfortable. In colder parts of NZ, or for buyers who want to minimise ongoing running costs, this makes a real difference over the years you live in the home.
It is also quieter. Double-glazed joinery cuts down on outside noise significantly, which matters if your site is near a road, in town, or on a windy exposed section.
Which Range Fits You
Economy is the right choice if you are looking for the most affordable path into a well-built tiny home or transportable home, and you are willing to add heating (or upgrade to double glazing later) if you find you need more thermal comfort. It is also the right choice for temporary or seasonal uses - a bach, a farm cottage, a rental unit - where the thermal performance premium is not worth the upfront cost.
Passive is the right choice if the home is your primary residence, especially if you are in a cooler region or on an exposed site. It is also the right choice if you value energy efficiency as a long-term investment - the premium you pay for Passive up front is offset over time by lower heating costs and greater comfort.
The Cost Difference
Passive builds cost more than Economy builds - typically in the range of 10 to 15 percent more for the same footprint, reflecting the upgraded roof insulation and double-glazed joinery. On a $150,000 build that is around $15,000 to $22,000 extra. On a larger transportable home the gap is proportionally similar.
Whether that premium is worth it depends on how long you plan to live in the home, how much you value comfort year-round, and whether you have the budget to make the upgrade at the point of build rather than retrofitting later.
Retrofitting Later
Some buyers ask whether they can start with an Economy build and upgrade to Passive later. Some upgrades are practical to retrofit - double-glazing can usually be swapped in, and roof insulation can be added under some circumstances - but both are more expensive to do after the fact than to spec at build time. If Passive is likely to make sense for you, it is generally worth doing at the outset.
Which Models Come in Both Ranges
Not every Smart Housing Solutions model is available in both Economy and Passive. Passive is offered on selected 10m x 5m, 10m x 6m, 12m x 5m, and 12m x 6m tiny homes, and on the 14m and 16m three and four-bedroom transportable homes. Cabins and smaller studio tiny homes are built to Economy spec.
For the eligible models, each product page on the SHS website shows both the Economy and the Passive price, so you can compare like-for-like on the exact footprint you are interested in.
How to Decide
The simplest way to decide is to think about how you will use the home. A permanent home you will live in year-round for many years, especially in a cooler part of NZ, is a strong case for Passive. A shorter-term use or a warmer climate is often a stronger case for Economy.
The Smart Housing Solutions team is happy to walk you through the trade-offs for your specific situation. Get in touch on 021 771 141 or sales@smarthousingsolutions.co.nz.
