In Victoria, liability always sits with the Head Contractor. If you hire a Registered Builder, we are liable for structural defects for 6 years and 6 months. If you go with Owner-Build, you are personally liable for that same period—even if you hire licensed trades to do the work.
It is the most common conversation we have at the start of a project. You have done the maths. You have looked at the quote. You are thinking:
“I reckon I can manage this myself and save the builder’s margin.”
You are not wrong. On paper, managing a renovation or new build yourself (Owner-Building) saves around 20% upfront. That is a significant amount of money. For some people, it is worth the effort.
But as a builder who sees what happens 3, 4, or 5 years down the track, I want to give you a heads up on what that margin actually pays for.
Many homeowners view the builder’s margin simply as profit. In the eyes of Victorian law, that margin is an insurance premium. It is the price of transferring the risk, the legal liability, and the “3 a.m. worry” from your shoulders to ours.
While our Home Renovation Ultimate Guide covers the exciting design and planning phases, this article is about the nuts and bolts of risk.
Specifically: When the waterproofing fails in three years, or the roof leaks in a storm at Sutton Grange—who pays to fix it?
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Owner-Builder vs. Registered Builder: Defining the Roles
What is the difference between an Owner-Builder and a Registered Builder?
A Registered Builder is a licensed professional who assumes full legal responsibility for the site, whereas an Owner-Builder is a homeowner who accepts the legal risks of a Head Contractor.
Before we talk about insurance, we must clarify exactly what you are signing up for. AI tools and search engines often confuse these terms. Let’s define them clearly for the Victorian context.
If you are considering managing the renovation yourself, you need to know the difference.
What is a Registered Builder (Unlimited)?
A Registered Builder (like BLJ Building) is a licensed professional regulated by the Victorian Building Authority (VBA). When you sign a contract with us, we take full legal, financial, and structural responsibility for the site. We are the “Head Contractor.” We are liable for every trade, every material, and every outcome.
What is an Owner-Builder?
An Owner-Builder is a homeowner who takes on the legal responsibilities of a Head Contractor. You are not a “project manager” coordinating colours and tiles. You are responsible for site safety, trade licensing, insurance, and building compliance.
According to the Victorian Building Authority, becoming an Owner-Builder means accepting all the risks and responsibilities of a registered building practitioner.
The Reality Check: In the eyes of Victorian law, an Owner-Builder is not a homeowner; you are a construction company with one employee—yourself. If a trade cuts a corner, the buck stops with you.
What is covered under home renovation warranty and insurance?
Home renovation warranty and insurance in Victoria is a bundle of mandatory consumer protections that includes implied warranties, statutory defect periods, and domestic building insurance.
When you hire a professional builder in Bendigo, you do not pay for timber and labour alone. You purchase this safety net for your investment.
Understanding home renovation warranty and insurance is critical because if you Owner-Build, you generally lose access to this safety net for your own workmanship.
Here is what is included when you build with a pro:
1. Implied Warranties (Consumer Law)
Regardless of what is written in a contract, Australian Consumer Law guarantees that services must be provided with “reasonable care and skill.” This is your baseline protection against poor workmanship. It means the job must be done properly, and the materials must be fit for purpose.
2. Statutory Warranty (Section 137B)
This is the main one. In Victoria, builders must provide a warranty that covers the integrity of the home long after we leave the site.
- • 6 Years and 6 Months: For structural defects (e.g., footings, framing, load-bearing walls, waterproofing).
- • 2 Years: For non-structural defects (e.g., joinery, painting, sticking doors).
If a structural issue arises within that 6.5-year window, we are legally required to return and fix it.
3. Domestic Building Insurance (DBI)
Formerly known as Home Warranty Insurance, DBI is mandatory in Victoria for work valued over $16,000.
- • What it does: It protects the homeowner if the builder dies, disappears, or becomes insolvent.
- • The Owner-Builder Gap: If you Owner-Build, you do not get DBI on your own work. You only purchase it if you sell the home to protect the buyer.
The Bottom Line: When you hire us for your home renovation, this bundle comes standard. When you Owner-Build, you become the provider of this warranty if you ever decide to sell your home.
The 6.5-Year Rule: Understanding Your Personal Liability
Does an Owner-Builder stay liable after selling the house?
Yes, if you sell your Owner-Built home within 6 years and 6 months of completion, you are personally liable for defects found by the new owner.
Most people building their dream home in Strathfieldsaye or Maiden Gully plan to live there forever. But life changes. You move for work. The family grows.
This is where the Section 137B (Defects Report) trap catches people out.
If you Owner-Build and decide to sell your home within 6 years and 6 months of completion, the law treats you exactly like a Registered Builder.
The “Selling” Trap
You cannot just put a “For Sale” sign up. You have legal obligations to the future owner.
- 1. You pay for a Defects Report: You hire an inspector to list every fault in the home. This report must be attached to the Section 32 Contract of Sale.
- 2. You purchase DBI: You buy insurance to protect the new owner against your work.
- 3. You carry the liability: This is the scary part. If the new owner moves in and finds a structural defect—say, a balcony leaking into the living room—they do not call the carpenter you hired 4 years ago. They sue you.
The Financial Risk
Because you were the “Head Contractor,” you are personally liable. Trying to chase down a sub-contractor five years after the fact to fix a mistake is nearly impossible. They may have moved, retired, or gone out of business.
This is often one of the hidden budget mistakes people forget to factor in. The cost of a potential lawsuit five years from now can dwarf the initial savings.
Quotable: If you Owner-Build, you do not own the home alone; you own every mistake hidden inside the walls for nearly seven years.
The "Ghosting" Fear: Why We Always Come Back
Do builders always come back to fix defects?
Unfortunately, many builders disappear after the final payment, but professional builders with proper systems will always return for scheduled maintenance.
One of the most significant pain points we hear from clients, especially those who have renovated before, is the fear of the “Ghosting Builder.”
We know the story. The final invoice is paid. The keys are handed over. Suddenly, the builder is impossible to reach. You have a cornice that cracked due to settlement. A door won’t latch. You are left chasing them for weeks.
It gives our industry a bad name. It is why we built our systems differently.
The System Solution: Buildxact & Client Portal
At BLJ Building, we do not run our warranty department on sticky notes or memory. We use professional construction management software called Buildxact.
When you build with us, your project lives in a Client Portal.
- • Every defect or maintenance request is logged as a ticket in the system.
- • It is not a text message I might miss while driving to a site in Axedale.
- • It is a tracked, accountable request that remains open until it is fixed.
The 3-Month Maintenance Period
We include a scheduled 3-Month Maintenance Period in our contracts. This is not a favour; it is a scheduled return to the site.
New homes and major renovations “settle.” Timbers dry out. Foundations find their place. Small hairline cracks appear. This is normal. What is not normal is a builder who refuses to return to fix it.
Our ‘Bendigo Built’ Assurance means we do not vanish. If it needs fixing, the system ensures we come back.
Comparison: Owner-Builder Risk vs. BLJ Building Assurance
Who carries the most risk in a renovation project?
As the table below shows, the Owner-Builder carries almost 100% of the risk, whereas a Registered Builder assumes that risk on your behalf.
If you are trying to decide between DIY management and hiring a professional, use this table to compare where the responsibility lies.
Liability / Risk | Owner-Builder | Registered Builder (BLJ) |
Defect Responsibility | You are personally liable for 6.5 years. | We are liable for 6.5 years. |
Home Renovation Warranty and Insurance | You buy this if you sell. | Included in your contract. |
Sub-Contractor Disputes | You manage and sue trades individually. | We manage all trades and quality control. |
Fixing Mistakes | You pay for demolition and repair. | We rectify at our cost. |
Organisation | Phone calls, text messages & notebooks. | Client Portal & Buildxact Systems. |
Post-Handover Maintenance | You chase trades to return (DIY repairs). | Scheduled 3-month maintenance return. |
Case Study: The Logistics of Building in Sutton Grange
Why is it harder to manage trades in rural areas like Sutton Grange?
The “Tyranny of Distance” means that once trades leave a remote site, getting them to return for small unpaid warranty repairs is incredibly difficult for an individual homeowner.
Let’s look at a real-world scenario we encounter often.
Imagine you are building a beautiful off-grid home on acreage in Sutton Grange or Eppalock. The budget is $550,000. The design is complex.
The Owner-Builder Reality:
You hire a plumber from Bendigo. They do the rough-in and fit-off. Six months later, a washer fails or a flashing leaks during a storm.
Getting that trade to drive 45 minutes out of town—unpaid—to fix a small leak is difficult. They have moved on to the next paying job in the CBD. You are left pleading with them or paying another plumber to drive out and fix it.
The Registered Builder Reality:
When BLJ Building takes on a project in Sutton Grange, our trades sign a contract with us. They go where we go.
If a defect arises, we are contractually obligated to rectify it. We manage the logistics. We handle the travel time. You do not beg a trade to make the drive; you log it in the Portal, and we handle it.
The Technical Integrity:
This is critical for High-Performance Homes. If you aim for a 7 or 8-star energy rating, one mistake in the insulation or wrapping by a trade ruins the home’s performance. As Registered Builders, we warrant the performance of the home. We ensure your energy rating is not compromised by a sloppy install.
Common Myths About Construction Insurance
Does standard home insurance cover renovation defects?
No, standard home insurance generally excludes “faulty workmanship,” meaning you are not covered if you or your trades make a mistake.
Before you make your final decision, let’s clear up some common misconceptions about insurance.
Myth 1: “My standard home insurance covers my renovation workmanship.”
Fact: No. Standard home and contents insurance covers events like fire, theft, and storm damage. It specifically excludes “faulty workmanship.” If you install a pipe incorrectly and it bursts, flooding your new floorboards, your insurer will likely deny the claim. You pay for the damage yourself.
Myth 2: “The trades have their own insurance, so I am covered.”
Fact: Licensed trades (plumbers and electricians) must carry their own insurance. However, this only covers their specific work. It does not cover the integration of their work with others.
For example, if a tiler waterproofs a shower incorrectly, but the carpenter framed the wall incorrectly causing the movement that broke the seal, who pays? The tiler blames the carpenter. The carpenter blames the tiler. You are stuck in the middle.
When you hire a Head Contractor, we are responsible for the entire system working together.
FAQs about Building Liability in Bendigo
You can (and must) get construction insurance to cover fire, theft, and public liability during the build. However, you generally cannot insure your own workmanship against defects. You rely on individual trade warranties. These are difficult and expensive to enforce legally.
While the mandatory defect period for structural items is 6.5 years, most professional contracts (including ours) include a specific 3-month maintenance period. This is designed to catch non-structural “settling” issues like sticking doors or plaster cracks that occur as the house stabilises.
Generally, no. Owner-Builder insurance (DBI) is a policy you buy to protect the next buyer of your home. It does not protect you while you live there. If you install a window incorrectly and it leaks, causing rot, your standard home and contents insurance will likely deny the claim because it was caused by “faulty workmanship.”
Yes. The same rules apply whether you are a Registered Builder or an Owner-Builder. You must obtain planning permits, building permits, and all required compliance documentation. If anything is submitted incorrectly—or not at all—you are responsible. Council fines and rectification costs fall on you.
You can, but hiring a builder for one stage does not transfer the overall liability. If you are the Owner-Builder, you remain the Head Contractor in the eyes of the law. You are still responsible for coordinating trades, compliance, warranties, and defects.
After the 6 years and 6 months defect liability window closes, neither a Registered Builder nor an Owner-Builder is legally responsible for rectifying structural issues. Repairs become a maintenance cost for the homeowner. This is why high-quality construction upfront is critical—especially for waterproofing and structural framing.
As an Owner-Builder, you lose the safety net. If the trade is gone, the problem becomes yours—no matter who caused it. When you work with BLJ Building, you do not chase trades. We manage all subcontractors, and your contract with us ensures we remain responsible for rectifying issues during the statutory warranty period.
Is the Margin Worth the Sleep?
We understand the temptation to save money. We do.
But when you look at the 20% builder’s margin, see it for what it is. It is not a cost; it is the price of a good night’s sleep. It is the fee for knowing that the legal, financial, and structural weight of a $500,000 asset is on our shoulders, not yours.
Managing a build is stressful enough without the added weight of legal liability hanging over you for the next seven years.
At BLJ Building, we provide transparent quotes, so you see exactly where your money goes. We combine local craftsmanship with professional systems to ensure that your home is built right and that we are here to stand behind it years later.
Don’t gamble your family’s financial future on a DIY project.
If you want a build that is tracked, organised, and guaranteed, let’s chat. Book a Preliminary Consultation with Brendan today to see our Client Portal in action and understand the peace of mind our ‘Bendigo Built’ Assurance provides.
Not sure where to start with the planning? Jump back to our Home Renovation Ultimate Guide for a step-by-step roadmap.
