Healthy Homes Standards NZ: Complete Guide for Inspectors (2026)
A guide for inspectors verifying Healthy Homes Standards compliance in NZ — all six standards, compliance timelines, and assessment methodology.
What Are the Healthy Homes Standards?
The Healthy Homes Standards are a set of minimum requirements for rental properties in New Zealand, introduced under the Residential Tenancies (Healthy Homes Standards) Regulations 2019. They require all rental homes to meet specific standards across six areas: heating, insulation, ventilation, moisture ingress and drainage, draught stopping, and — for properties with ranges or cooktops — rangehood or extraction requirements that fall under the ventilation standard.
For building inspectors, the Healthy Homes Standards represent a significant and growing area of work. Since 1 July 2024, all private rental properties in New Zealand must fully comply with all six standards, regardless of tenancy start date. This deadline has created sustained demand for independent compliance assessments — and for inspectors who understand the technical requirements well enough to produce defensible, documented reports.
This guide is written for inspectors conducting Healthy Homes assessments. It covers the technical requirements of each standard, what you are checking during an assessment, and how to structure your compliance documentation.
The Compliance Timeline
Understanding where we are in the compliance rollout matters for context:
- 1 July 2021 — All new or renewed tenancies must include a Healthy Homes compliance statement
- 1 July 2023 — All Housing New Zealand and registered community housing provider properties required to comply
- 1 July 2024 — All private rentals must comply with all six Healthy Homes Standards
As of mid-2024, full compliance is mandatory across the private rental market. Landlords who commission an independent inspector's assessment can use that report as documented evidence of their compliance position — and inspectors who understand the standards in depth are well placed to provide that service.
The Six Healthy Homes Standards Explained
1. Heating Standard
The heating standard requires a fixed heating device capable of heating the main living room to at least 18°C. The required heating capacity (in kilowatts) is calculated using a formula that accounts for the room's floor area, ceiling height, insulation level, the number of exposed surfaces (walls, floor, ceiling), window area, and the property's climate zone.
What inspectors assess:
- Is there a fixed heating device in the main living room?
- What type is it? (Heat pump, wood burner, flued gas heater, electric panel heater)
- What is its rated heating output in kilowatts?
- Does the rated capacity meet the minimum required for the specific room, based on the heating assessment tool calculation?
- Is the heater in functional, serviceable condition?
Important: Unflued gas heaters and portable heating devices do not comply, regardless of their output capacity. Only fixed, flued, or ducted heating is acceptable. Where you cannot confirm a heater's rated capacity from the unit's data plate or manufacturer specifications, note this as a limitation and recommend the landlord obtain the product documentation.
2. Insulation Standard
The insulation standard requires ceiling and underfloor insulation meeting minimum R-values, unless the property is exempt (e.g., no accessible subfloor, or insulation physically cannot be installed without significant structural work).
What inspectors assess:
- Is ceiling insulation present? Identify the type (glasswool batts, polyester, blown-in) and measure or estimate thickness
- Is the R-value identifiable from manufacturer labels or product specification markings on the insulation?
- Is the insulation in reasonable condition — not significantly degraded, water-damaged, compressed, or displaced?
- Is underfloor insulation present where there is an accessible subfloor?
- Are there gaps in insulation coverage, particularly around ceiling penetrations, downlights, and joinery?
Minimum R-values by climate zone:
- Zone 1 (Northland, Auckland, Bay of Plenty coast): Ceiling R2.9, underfloor R1.3
- Zone 2 (Most of the North Island): Ceiling R2.9, underfloor R1.3
- Zone 3 (Central plateau, Wellington, most of the South Island): Ceiling R3.3, underfloor R1.3
Inspectors should be familiar with the zone map and record which zone applies to the property being assessed.
3. Ventilation Standard
The ventilation standard requires openable windows in all habitable rooms — living rooms, bedrooms, kitchens, and dining rooms — plus mechanical extraction in kitchens and bathrooms.
What inspectors assess:
- Does each habitable room have at least one openable window or skylight?
- Is the openable area at least 5% of the room's floor area?
- Is there a functioning extraction fan in each bathroom, shower room, and toilet?
- Is there a rangehood or extraction fan in the kitchen?
- Do extraction fans vent directly to the outside — not into the ceiling space or roof void?
- Are extraction fans in working order (test where possible)?
A common non-compliance finding is extraction fans that discharge into the ceiling rather than directly outside. Document this clearly with photographs showing the duct termination point.
4. Moisture Ingress and Drainage Standard
The moisture standard requires that the property has adequate drainage and effective moisture barriers to prevent water entering the building or accumulating under it.
What inspectors assess:
- Is there adequate surface drainage around the building — gutters, downpipes, and surface grading directing water away from the foundation?
- Is the subfloor dry and adequately ventilated (where accessible)?
- Is there a ground moisture barrier — minimum 0.012mm polyethylene sheeting — covering at least 75% of the exposed ground in the subfloor?
- Are there visible signs of moisture ingress: water staining, efflorescence, mould growth, or active dampness?
- Is the property free from active plumbing leaks?
Subfloor moisture barriers are one of the most commonly deficient items in older New Zealand housing stock. Record the condition and coverage of any existing ground cover, and photograph any areas of exposed ground, standing water, or visible moisture damage.
5. Draught Stopping Standard
The draught stopping standard requires that unnecessary gaps and openings in the building envelope are blocked to prevent uncontrolled airflow. This applies to walls, ceilings, floors, windows, doors, and any other penetrations.
What inspectors assess:
- Do all exterior doors close properly and have functional draught strips or door seals?
- Do all windows close and latch properly with intact seals?
- Are there open fireplace flues that allow draughts when not in use (and no compliant blocker fitted)?
- Are there gaps around pipes, wiring, or other penetrations through exterior walls or the floor?
- Are there unused cat doors or other unnecessary openings in the building envelope?
- Are there gaps between the floor and the skirting boards on exterior walls?
6. The Sixth Standard: What Counts
The Healthy Homes Standards are often referred to in earlier materials as "five standards," but the Residential Tenancies (Healthy Homes Standards) Regulations 2019 effectively address six distinct areas of compliance when the ventilation standard's rangehood and extraction requirements are treated separately in assessment practice. Inspectors should structure their assessment reports to address each area discretely, ensuring no compliance requirement is obscured by being bundled under a broader heading.
How to Structure a Healthy Homes Assessment
A methodical approach ensures complete coverage and a defensible report. A recommended sequence for a standard residential assessment:
- Start outside — assess drainage, gutters, downpipes, and ground levels around the perimeter
- Subfloor (where accessible) — check ground moisture barrier, ventilation, and subfloor condition
- Main living room — identify and assess the heating device, calculate or verify required capacity
- Ceiling space (where accessible) — inspect insulation type, condition, and R-value markings
- Each habitable room — check openable window area against the 5% threshold, note room dimensions
- Kitchen — check rangehood or extraction fan, operation, and external venting
- Bathrooms and toilets — check extraction fans, external venting, and window openings
- All doors and windows — check for draught seals, closure, and gaps
Most assessors complete a standard three-bedroom property in 45–60 minutes using a structured inspection app. The bottleneck is usually the heating capacity calculation — have a reliable tool or calculation method ready before arriving on site.
Compliance Documentation
Landlords need documented evidence of compliance. Your assessment report should clearly state:
- Which standards the property meets — with photographic evidence for each
- Which standards the property does not meet — with specific findings and locations
- What remediation is required — clear, actionable recommendations
- The date of the assessment and the property details
- Any limitations — areas that were inaccessible or could not be fully assessed
A professional, well-structured report protects both the landlord and the tenant. The landlord can demonstrate they have had the property independently assessed and have taken action on any findings. The tenant has documentary evidence of the property's compliance status at the start of their tenancy.
Penalties for Non-Compliance
Landlords who fail to comply with the Healthy Homes Standards can face:
- Infringement notices of up to $4,000 per breach
- Tenancy Tribunal orders requiring compliance within a specified timeframe
- Exemplary damages of up to $7,200 in cases involving intentional or particularly serious breaches
- Work orders requiring specific remediation
For property managers, ensuring landlords are assessed and compliant is a legal requirement that carries direct liability implications. An independent inspector's report, properly documented, is the most defensible evidence a landlord can hold.
FAQ
Do all six Healthy Homes Standards apply to every rental property in NZ?
Yes. As of 1 July 2024, all private rental properties in New Zealand must comply with all Healthy Homes Standards. There are limited exemptions for specific situations — for example, the underfloor insulation requirement does not apply where the subfloor is inaccessible and installation would require significant structural work. Any applicable exemptions should be documented in your assessment report with supporting reasoning.
Can a building inspector conduct a Healthy Homes assessment, or is specialist certification required?
There is no formal licensing requirement to conduct a Healthy Homes assessment in New Zealand. However, inspectors need a thorough understanding of the regulations to produce a technically accurate and legally useful compliance report. Building inspectors with experience in residential properties are well placed to conduct these assessments — particularly when structured around a systematic template covering all six standards.
What is the minimum R-value required for ceiling insulation in NZ?
The minimum required R-value depends on the property's climate zone. Zone 1 and Zone 2 properties (most of the North Island) require a minimum of R2.9 for ceiling insulation. Zone 3 properties (central plateau, Wellington, and most of the South Island) require a minimum of R3.3. Underfloor insulation requirements are R1.3 across all zones. Existing insulation installed before the regulations may meet compliance if it was installed to the standard applicable at the time and remains in reasonable condition.
How long does a Healthy Homes assessment take?
A thorough assessment of a standard three-bedroom home typically takes 45–60 minutes on-site. Larger or more complex properties — those with multiple heating zones, subfloor access issues, or suspected non-compliance across several standards — may take longer. Report preparation time depends on the tools used; inspectors using a mobile reporting app can generate and send the compliance report before leaving the property.
Need a faster way to assess and document Healthy Homes compliance? InspectPro lets you structure assessments around all six standards, photograph findings, and generate a professional compliance report on your iPhone — on-site, before you leave.