TRADE WARRANTIES IN WA

Statutory warranties — what the law implies

Under the Building Services (Complaint Resolution and Administration) Act 2011 and the Building Act 2011, residential building work in WA carries implied statutory warranties regardless of what the contract says. These include that the work will be done in a proper and workmanlike manner, that materials will be fit for purpose, and that the completed building will be fit to occupy. These warranties cannot be contracted out of — a contract that attempts to waive them is unenforceable to that extent.

The 6-year and 25-year rule

In WA, the limitation period for building defect claims is generally 6 years from the date the defect became apparent (or should have been apparent). For structural defects, a 25-year period applies under the Building Act in certain circumstances. In practice, most homeowners are unaware of these timeframes and either act too late or too early. The 6-year clock starts running from when the defect manifests — not when the work was completed — which is an important and poorly understood distinction.

Home Indemnity Insurance — a safety net with large gaps

WA requires Home Indemnity Insurance (HII) for most residential building contracts over $20,000 involving a licensed builder. HII covers homeowners if the builder dies, disappears or becomes insolvent — but not if the builder is still in business and simply refuses to honour the warranty. This distinction is critical. The most common warranty dispute scenario — a builder who is still operating but unwilling to return to rectify defective work — is not covered by HII. The policy exists to manage insolvency risk, not conduct risk.

The Building and Energy complaint process

The Building and Energy division of DMIRS administers the complaints process for building work in WA. Homeowners can lodge a complaint about defective work, and a building inspector may be appointed to assess the defect. If the complaint is upheld, a rectification order can be issued. In practice, the process is slow (often 6–18 months), requires the homeowner to manage a significant administrative burden, and results in rectification orders that are difficult to enforce against a non-compliant contractor. The complaint process is free but not simple.

The boom-bust construction cycle

WA's construction sector is unusually volatile relative to eastern states — amplified by the resources sector's effect on labour costs, migration and consumer confidence. The mining boom periods of 2005–2012 and 2020–2024 saw rapid expansion of the building sector, with many new entrants operating without adequate capital, experience or systems. Warranty obligations incurred during boom periods often surface 2–5 years later when market conditions have changed and marginal operators have exited. This lag between work completion and warranty claim creates a mismatch between the trading entity at the time of work and the entity (if it still exists) at the time of claim.

Outer suburb and regional city construction volume

The scale of residential development across outer Perth — Ellenbrook, Baldivis, Alkimos, Piara Waters, Byford — and in regional WA cities experiencing their own growth cycles has produced an enormous volume of new homes built by volume builders and subcontractors operating under cost and schedule pressure. Bunbury, Busselton, Geraldton, Broome, Karratha and Port Hedland have all seen significant residential construction booms tied to resources sector activity and population growth. In regional cities, the warranty exposure problem is compounded: fewer local contractors means less competitive pressure on quality, longer distances make return visits for rectification more costly for the tradie, and regulatory oversight is lighter than in Perth metro. Homeowners in both outer Perth suburbs and regional WA cities are statistically more likely to encounter warranty issues and less likely to have the documentation required to pursue them.

Distance from regulatory oversight

WA operates its own building regulation framework largely independently of eastern state equivalents. The Building and Energy division is adequately resourced for routine licensing but faces limitations in its enforcement capacity for complex multi-trade disputes or systemic issues with larger builders. There is no equivalent of the NSW Fair Trading rapid dispute resolution process in WA. The consequence is that homeowners with legitimate warranty claims face a slower, more expensive process than counterparts in other states.

The climate-warranty connection

Perth's extreme climate creates warranty exposure that would not exist elsewhere. Waterproofing failures that might take 10 years to manifest in Melbourne manifest in 3 years in Perth's UV-intense, thermally cycling environment. Decking treatments that last 5 years in Sydney last 2 years in Carnarvon. Paint systems applied without adequate surface preparation fail in 18 months on north-facing Perth walls. The connection between WA's climate and accelerated defect manifestation is poorly understood by both homeowners and some tradies — and rarely discussed in warranty documentation.

Written scope before work starts

The scope agreement defines what was built, to what standard, with what materials. Without it, a warranty claim has no baseline. Every warranty dispute begins with the question: what was actually agreed?

Photographic record at completion

Timestamped photographs of the completed work, before and after, provide evidence of the condition at handover. They establish that defects visible at a later date were not present at completion — or that they were.

Explicit warranty terms in writing

The warranty period, what it covers, how defects should be notified, and what the response time commitment is should all be in writing. A verbal warranty is unenforceable. A warranty that says "call me if there are problems" is not a warranty.

Milestone sign-off with dates

Signed milestone approvals establish when each stage was completed and accepted. This is relevant to the warranty period start date and to establishing the sequence of events in any dispute.

Compliance certificates on file

Electrical Certificates of Compliance, plumbing Form 5s, and waterproofing certificates should be retained against the job record. They are required for insurance claims, property sales and warranty enforcement.

Formal defect notification process

The warranty document should specify how defects are to be notified — in writing, to a specific contact, within a defined period of discovery. This is not bureaucratic — it creates the paper trail that makes rectification enforceable and protects the tradie from claims years later about defects they were never told about.

Before signing off on any trade job, confirm the following are in place:

Unclear scope creates unclear responsibility

When a defect appears after a job is complete, the first question is almost always: whose responsibility is it? In multi-trade jobs — a bathroom renovation involving a tiler, plumber and electrician — the answer is rarely obvious. Water damage behind a wall could be a plumbing failure, a waterproofing failure, or a tiling failure. Without a written scope that defines each trade's responsibilities, the tradie faces an allegation they cannot easily defend and the homeowner cannot easily prove. Both parties lose time, money and goodwill in a dispute that a clear scope agreement would have resolved in ten minutes.

Legitimate workmanship questioned without a standard

A common and genuinely unfair scenario: a tradie completes work to an industry-accepted standard. The homeowner, having no reference point, believes the result is defective. Without agreed specifications in writing — tile lippage tolerance, paint coat count and product, concrete surface finish — the tradie has no documented standard to point to. They know their work was correct but cannot prove it. The warranty complaint process, slow and adversarial by design, does not resolve these ambiguities quickly. Reputation damage accumulates before any finding is made.

The impact of previous tradies' poor work

In renovation work, a tradie frequently encounters the consequences of previous work — inadequate waterproofing, non-compliant framing, undersized electrical — that they did not cause. Without a documented pre-work condition report (photographs, notes on what was found), the new tradie can inherit responsibility for defects they discovered but did not create. This is particularly common in regional WA where construction activity has surged rapidly in resource towns — Karratha, Port Hedland, Broome — without a corresponding increase in experienced trades, leading to layered defects from multiple contractors over time.

The reputational asymmetry

A homeowner who has a poor experience — whether the tradie was genuinely at fault or not — is more likely to leave a negative review than a satisfied homeowner is to leave a positive one. In a sector where reputation is the primary currency, the absence of documented scope agreements, milestone records and warranty terms means tradies have no structured evidence to contest inaccurate accounts of their work. The Dialogue Rating on Steadyhand is designed to address this directly: a tradie who communicates clearly, documents thoroughly and responds to warranty issues promptly builds a verifiable professional record that reflects their actual conduct.

Confusion about statutory obligations

Many tradies — particularly sole traders and small operators working outside major builders — are genuinely uncertain about their statutory warranty obligations under WA law. The distinction between what is required by law and what is promised contractually is often unclear. This uncertainty leads to two equally problematic outcomes: some tradies over-extend themselves on obligations they do not legally owe, while others assume no obligations exist beyond what was verbally agreed. Neither position serves the tradie or the homeowner. A written scope agreement with explicit warranty terms removes this ambiguity.

Every job produces a signed scope agreement — the baseline for any warranty claim

Milestone sign-offs are date-stamped and tied to the job record

Compliance certificates are filed against the job in the document vault

Warranty issues are logged through the platform — creating a timestamped record

The Dialogue Rating reflects how tradies respond to warranty issues — visible to future clients

You are responsible for your subcontractor's work

When you engage a subcontractor to perform part of a job, your warranty obligation to the client covers their work as well as your own. The client's contract is with you — not with your subcontractor. If the subcontractor's work is defective, the client's claim is against you as the head contractor. You then pursue the subcontractor separately. This is the doctrine of privity of contract, and it applies regardless of what your subcontract says.

The Building Commissioner cannot hear the client's complaint directly against your subcontractor

The Building Services (Complaint Resolution and Administration) Act 2011 explicitly excludes work carried out by a person who is in turn obliged to perform the work under another contract — that is, subcontractor work. A homeowner cannot lodge a complaint directly against your subcontractor with the Building Commissioner. The complaint is against you. If a rectification order is issued, you must comply — and then pursue your subcontractor separately if their work caused the defect.

If your subcontractor's work fails a product warranty claim

When a defect is caused by a product or material failure rather than workmanship, the question of who installed it matters. A manufacturer may decline a warranty claim if they can show the product was improperly installed. Your subcontractor's installation methodology and the product they used are therefore directly relevant to your exposure. Keeping a record of what was installed, by whom, using which product, is not administrative overhead — it is your protection.

Practical steps to protect yourself

Use a written subcontract for every engagement — even for small jobs. Specify the scope clearly. Require the subcontractor to carry their own public liability insurance and provide evidence of it. Keep records of who did what work and when. If you use Steadyhand, adding the worker to the job record creates a timestamped record of their involvement that is available to you if a dispute arises. This does not create a direct contractual relationship between the subcontractor and your client — but it creates the evidence trail that supports your claim against the subcontractor if their work is later found to be defective.

The ACL applies to your subcontractor's work too

Under the Australian Consumer Law, the service guarantee of due care and skill applies to every trade transaction. Your subcontractor's obligation to perform with due care and skill runs from them to you (under your subcontract). Your obligation to deliver with due care and skill runs from you to the client. Both obligations exist simultaneously. If a subcontractor's poor workmanship causes a defect, you have an ACL claim against the subcontractor — but your client's ACL claim is against you.