A home building warranty is the safety net that protects you if something goes wrong with your new home after handover. In Western Australia, this protection comes from two separate sources: a statutory home building warranty built into every contract, and Home Indemnity Insurance that covers you if your builder can’t finish or fix the work themselves.
Understanding what a new house warranty actually covers, and for how long, matters just as much as choosing the right builder in the first place. This guide breaks down exactly what’s protected, what isn’t, and how long each protection lasts.
At Pioneered Modern Engineering (PME), every home we build comes with full statutory warranty coverage and compliant home indemnity insurance as standard.
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Home Building Warranty at a Glance
| Protection | What It Covers | Duration in WA |
| Statutory structural warranty | Foundation, slab, load-bearing and roof structure defects | 6 years from completion |
| Statutory non-structural warranty | Cracking, finishes, doors, windows, minor defects | 2 years from completion |
| Home Indemnity Insurance | Builder insolvency, death, or disappearance | Matches the structural and non-structural periods above |
Each protection responds to a different problem, so it pays to understand all three before you assume you’re covered.
How Home Building Warranty Australia Rules Work in WA
Home building warranty australia rules are set at the state level, so what applies in WA differs from NSW, Victoria or Queensland. Two protections apply to WA homeowners.
The first is a statutory warranty built into your building contract by law. This requires the builder to complete work with due care, use suitable materials, and comply with the plans and specifications you agreed to.
The second is home construction warranty insurance, known in WA as Home Indemnity Insurance. It’s mandatory for any residential contract over $20,000, and it protects you specifically if your builder dies, disappears, or becomes insolvent before finishing or fixing the work.
Your builder must give you a certificate of Home Indemnity Insurance before taking a deposit. If they can’t produce one, that’s a serious red flag worth walking away from.
What Is Covered Under a New Build Warranty
A new build home warranty in WA protects several distinct areas of your build, each with its own coverage period.
Structural Defects
Structural defects are covered for 6 years from the date of practical completion. This includes:
- Foundation and slab failures
- Load-bearing wall defects
- Roof structure failures
- Any defect that affects the structural integrity of the home
Non-Structural Defects
Non-structural defects are covered for 2 years from completion. This includes:
- Cracking in cornices or plasterboard from normal settling
- Minor tiling or grouting defects
- Doors and windows that stick or don’t seal properly
- Paint and finish defects
Home Indemnity Insurance Protection
Separately, Home Indemnity Insurance covers you if the builder themselves can’t complete the job, specifically in cases of insolvency, death, or disappearance. This is not the same as a defects warranty, and it doesn’t apply to disputes over workmanship while the builder is still trading.
What Is Not Covered Under a Home Building Warranty
Building warranty insurance and statutory warranties have real limits, and it’s worth knowing these before you assume everything is protected.
Typically excluded are:
- Normal wear and tear
- Damage caused by the homeowner, tenants, or third parties
- Changes in ground conditions after completion, such as reactive soil movement not caused by construction defects
- Items covered separately under manufacturer warranties, such as appliances and hot water systems
- Cosmetic issues reported after the relevant defect period has expired
- Work carried out by a different contractor after handover
If a builder becomes insolvent but the work itself was completed to standard, Home Indemnity Insurance won’t be triggered, since it responds to non-completion or the builder’s inability to rectify, not general dissatisfaction with finished work.
Is a 10-Year Structural Warranty Real in WA?
You’ll often see references online to a “10 year structural warranty” on new homes. In Western Australia, that figure is inaccurate. The actual structural defect period here is 6 years from practical completion, not 10.
This 6-year period is consistent with most other states, including NSW, Victoria and Tasmania. Queensland runs slightly longer at 6 years and 6 months. No mainland state currently offers a full decade of structural cover as standard, so treat any builder or article quoting “10 years” for a WA build with caution.
Is Plumbing Covered Under a Builder’s Warranty?
Plumbing defects caused by faulty workmanship or non-compliant materials fall under your statutory warranty, typically as a non-structural defect with a 2-year coverage window. Major plumbing failures tied to structural elements, such as slab penetrations installed incorrectly, may fall under the longer structural period instead.
Plumbing work itself must also comply with separate WA plumbing regulations and licensing requirements, independent of your building warranty. If a plumbing issue emerges, report it to your builder in writing as soon as it’s identified rather than waiting for a scheduled maintenance visit.
Does a Home Construction Warranty Cover Renovations Too?
Home construction warranty protections aren’t limited to new builds. Major renovations, extensions, and additions above the $20,000 threshold in WA are also required to carry Home Indemnity Insurance and the same statutory structural and non-structural warranty periods.
Smaller renovation jobs under the threshold still carry the general statutory warranty obligations around due care, skill, and suitable materials, even without mandatory Home Indemnity Insurance. If you’re renovating rather than building new, confirm with your contractor which protections apply to your specific contract value before work begins.
How to Make a Home Building Warranty Claim
Start by notifying your builder in writing, with photos and a clear description of the defect. Reputable builders will inspect and respond within a reasonable timeframe, often specified in your contract’s defects liability clause.
If your builder is unresponsive, or has become insolvent or unreachable, you can lodge a claim through your Home Indemnity Insurance provider directly. Keep your certificate of insurance, contract, and all correspondence, since these are required to support a claim.
Working with a properly registered, financially stable builder from the outset is the best protection against ever needing to make this call. Our guide on how to choose the right construction partner in Australia covers the due diligence steps worth taking before you sign anything.
Choosing a Builder Who Honours Their Warranty
A home building warranty is only as strong as the builder standing behind it. Registration and insurance certificates confirm the legal minimum, but they don’t guarantee a builder will respond promptly when a genuine defect appears years after handover.
Look for a track record of completed projects, stable trading history, and a clear defects process written into your contract rather than left vague. Builders who treat the defects liability period as routine service, not an inconvenience, are the ones worth signing with. You can read more about our approach and history on our about us page.
Build With Full Warranty Protection From Day One
A home building warranty only matters if the builder behind it is registered, insured, and still standing years after handover. At PME, every project includes full statutory warranty coverage and Home Indemnity Insurance, backed by our residential construction services and construction project management from site assessment through to your defects period.
Call PME today on 0480 452 067 or visit pioneeredme.com.au to book your consultation.
Frequently Asked Questions
What Is Covered Under a New Build Warranty?
A new build warranty covers structural defects for 6 years and non-structural defects for 2 years in WA, plus separate Home Indemnity Insurance protection if your builder becomes insolvent, dies, or disappears before completing or fixing the work.
What Is Not Covered Under a Warranty?
Normal wear and tear, homeowner-caused damage, ground movement unrelated to construction defects, manufacturer-covered appliances, and work by unrelated contractors after handover are generally excluded from home building warranty protection.
How Long Does a Warranty Last on a New Build?
In WA, structural defects are covered for 6 years from practical completion, and non-structural defects for 2 years. These periods are set by legislation and apply regardless of which builder you use.
What Is the 2-Year Warranty on a New Build?
The 2-year period covers non-structural defects, including minor cracking, finish and paint issues, and doors or windows that don’t operate correctly. It runs from the date of practical completion.
Is Plumbing Covered Under a Builder’s Warranty?
Yes, plumbing defects caused by faulty workmanship are generally covered under the non-structural 2-year warranty period, while major plumbing issues tied to structural elements may fall under the 6-year structural period.