Yes, as a landlord you can carry out your own Healthy Homes assessment on your rental property — there is no legal requirement to hire a professional inspector. However, the standards are detailed, the documentation must be accurate, and getting it wrong can expose you to significant financial penalties. Understanding exactly what's required before you start will save you time and stress.
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 Act 1986. They cover five key areas:
- Heating – a fixed heater capable of heating the main living room to at least 18°C
- Insulation – ceiling and underfloor insulation meeting minimum R-values
- Ventilation – extractor fans in kitchens and bathrooms, and openable windows
- Moisture ingress and drainage – gutters, downpipes, and drainage must be in good working order
- Draught stopping – gaps and holes that cause unreasonable draughts must be blocked
Full details of each standard, including the specific measurements and R-value requirements, are published by Tenancy Services, which is your primary reference point for compliance.
Can You Legally Do It Yourself?
Yes — the law does not require a licensed or accredited assessor to carry out a Healthy Homes inspection. As the landlord (or property manager), you are responsible for ensuring compliance and for completing a Healthy Homes compliance statement in every new or renewed tenancy agreement. This statement declares which standards have been met and which are still in progress.
That said, self-assessing accurately requires you to:
- Measure your insulation depth and confirm R-values
- Calculate your heater's heating capacity against a formula based on room size, climate zone, and glazing
- Check extractor fan airflow rates meet minimums
- Inspect subfloor drainage and ground moisture barriers
- Identify and seal draughts
Some of these checks are straightforward; others — particularly the heater capacity calculation and insulation R-value verification — can be tricky without experience.
Step-by-Step: How to Self-Assess
1. Download the Official Checklists
Tenancy Services provides detailed guidance and checklists for each standard at tenancy.govt.nz. Work through each standard methodically and keep written records.
2. Check Your Insulation
Measure ceiling insulation depth with a ruler and identify the product if possible to confirm its R-value. For underfloor insulation, you'll need to access the subfloor space. BRANZ publishes useful guidance on insulation performance and installation standards if you need technical backup.
3. Calculate Heater Capacity
The heating standard uses a specific formula. Tenancy Services provides a free online heating assessment tool — use it carefully, as climate zone (check the Tenancy Services website for the number of climate zones used in the heating calculation) and room characteristics both affect the required kilowatt output.
4. Inspect Ventilation
Check that extractor fans are present in the kitchen and bathroom, are ducted to the outside, and meet the minimum airflow rates (in litres per second). Openable windows must meet minimum size requirements relative to floor area.
5. Assess Moisture and Drainage
Walk around the exterior and check gutters, downpipes, and drainage paths. Inside the subfloor, look for standing water or excessive dampness. A ground moisture barrier (polythene sheet) is required where there is a suspended timber floor over bare earth.
6. Identify Draughts
Check around windows, doors, chimneys, and any gaps in the building envelope. Draught stopping is one of the more DIY-friendly standards to both assess and fix.
Documenting Your Assessment
Documentation is critical. You must be able to demonstrate compliance if a tenant raises a dispute or Tenancy Services investigates. Keep:
- Photos of insulation, fans, heaters, and drainage
- Measurements and calculations
- Receipts for any work done
- Copies of your compliance statements
Poor or missing records are one of the most common reasons landlords face penalties, even when the property is actually compliant.
Compliance Deadlines
All private landlords must comply with all five Healthy Homes Standards. Compliance timeframes have been phased in — if you are unsure of the current deadline that applies to your tenancy type, check the Tenancy Services website for the latest information, as dates have been updated over time.
What Work Requires a Licensed Tradesperson?
While the assessment can be DIY, any remedial work you carry out may require a licensed professional:
- Electrical work (installing a fixed heater, adding a heat pump, wiring extractor fans) is restricted electrical work and must be done by a registered electrician. See EWRB for details.
- Plumbing related to drainage or moisture issues may require a licensed plumber — check with the Plumbers, Gasfitters and Drainlayers Board.
- Structural work may require a building consent — always check with your local council before starting.
⚠️ Safety note: Never attempt electrical or gas work yourself. Unlicensed work is illegal, dangerous, and will void your insurance.
When to Call a Professional
Consider hiring a qualified building inspector or Healthy Homes assessor if:
- Your property is older or has complex construction (e.g., no subfloor access, mixed insulation types)
- You are unsure about the heater capacity calculation or insulation R-values
- You have received a notice from Tenancy Services or a tenant has raised a compliance dispute
- You manage multiple properties and need efficient, defensible documentation
- You simply want peace of mind that your assessment will hold up to scrutiny
A professional assessor will provide a written report that can serve as strong evidence of compliance. You can find qualified local building inspectors and assessors on tradedirectory.co.nz.
Licensed Building Practitioner (LBP)
BCITO Qualified
