How much does it cost to build a sleepout in NZ in 2026?
Short answer
A basic non-habitable sleepout (under 30 m², no plumbing) runs $15-35k in 2026. Add plumbing for a bathroom and kitchenette and you're at $40-70k. A fully self-contained 70 m² minor dwelling under the 2026 exemption runs $120-220k. Wide variation depending on cladding, insulation, and whether services are run from the house or new connections. Always confirm consent vs exempt status before starting.
Source: Building Act 2004 Schedule 1. Updated May 2026.
Want to check the builder you're talking to? Check any NZ company, no signup.
Check a builderKey facts
- Basic sleepout (no plumbing, under 30 m²): $15-35k
- Sleepout with kitchenette/bathroom: $40-70k
- 70 m² minor dwelling (under 2026 exemption): $120-220k
- Under 30 m² detached can be exempt with conditions
- Self-contained dwellings need LBP-supervised design and construction even under the exemption
What drives the cost
Floor area — same per-m² maths as a normal house, slightly more expensive per m² because small builds don't dilute fixed costs.
Whether it's habitable — insulation, ventilation, fire-safety, means of escape all kick in for habitable use.
Services — running power, water and waste from the existing house is cheaper than new connections from the street.
Cladding match to the main house — matching cladding looks better but costs more than a generic shed cladding.
Consent vs exempt
Schedule 1: single-storey detached buildings under 30 m² can be exempt from consent IF they're not used for habitation (sleeping). A 'sleepout' used for actual sleeping technically requires consent unless the new 70 m² exemption applies.
The 70 m² exemption (from 15 Jan 2026) allows a fully self-contained dwelling — but only with LBP-supervised design and construction. Not a DIY path.
Get clear with your council before starting. Retrospective consents (Certificate of Acceptance) are slower and more expensive than getting it right first time.
Knowing the rules is half the job. The other half is knowing who you're hiring. Check any NZ builder against the public record: company status, licensing and insolvency notices, from the official NZ sources.
Planning the project? See the costs
Related questions
Sources: Building Act 2004 Schedule 1; Sleepout-specialist builder quotes 2025-2026. General information for NZ homeowners, not legal advice. Building rules change and vary by council, so confirm critical details on the official source before acting. Last updated 2026-05.