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Understanding the difference between a shed, a sleepout, and a house comes down to how each is built, used, and regulated by the building code. We’re here to break it down for you!
The New Zealand Building Code categorises buildings into different importance levels (IL) from IL1 to IL5, based on the risk to human life and the purpose of the building. This determines the building standards required for construction.
At the lowest risk level (IL1), buildings like sheds, farm implement sheds, and garages are classified as low-risk because they are entered infrequently. These structures do not require the same level of strength and safety features as a home or sleepout. For instance, if a shed is damaged in an extreme weather event, the risk to human life is minimal.
In contrast, IL2 buildings—such as homes, sleepouts, and business premises—are designed for regular occupancy. These buildings need to meet stricter building standards, including deeper foundations, stronger materials, and enhanced weather tightness. Because people sleep in both houses and sleepouts, the same structural standards apply, making IL2 structures more costly to build but much safer.
When a shed includes both storage and living spaces, like a workshop with an attached sleepout, the entire structure must meet IL2 standards. This ensures the sleeping area remains safe in case of a structural failure in the storage section.
Buildings at IL3, IL4, and IL5 levels—such as hospitals, power stations, and emergency services buildings—are subject to even more stringent building standards due to their essential nature and the greater risk to human life.
When does a shed become a sleepout?
You can add a toilet, shower, and basin to an IL1 shed, but once it includes cooking or sleeping facilities, it’s considered a habitable IL2 structure and must comply with IL2 building standards.
Is a “shed house” cheaper than a regular house to build?
No, a “shed house” must meet the same building code requirements as a traditional house. While the appearance may differ, the costs are likely to be similar due to the same construction standards. This is a common misconception about shed houses!
Can I live in my IL1 shed while my house is being built?
No, the council will require your shed to meet IL2 standards for it to be used as accommodation, even temporarily.
Can I convert my IL1 shed into a sleepout without telling the council?
No, it is illegal to do so. If discovered, you could be fined, and the structure may need to be demolished. Also, without the required compliance documentation, selling the property later could be problematic.
Can KiwiSpan provide an IL2 habitable building kit?
Yes, KiwiSpan can supply an IL2-compliant building, but you will need a Licensed Building Practitioner (LBP) to construct it and sign off that it meets building code standards. For any restricted building work, such as drainage and plumbing, the appropriate professionals must be involved to ensure everything is fully compliant.
Can KiwiSpan build the IL2 shell, and I do the fit-out?
Yes, this is possible with an LBP to sign off on the fit-out. Availability may vary, so check with your local KiwiSpan team.
Can KiwiSpan build a complete sleepout or house?
While we primarily specialize in IL1 solutions, some KiwiSpan teams offer complete solutions, including sleepouts and homes. Availability may differ depending on your local KiwiSpan licensee.
Please contact your local KiwiSpan team to discuss your shed project and they will be happy to provide more information.