Knowledge · Insurance
Construction insurance
for residential builders.
A half-built house is uninsurable under a normal home policy, and a single liability claim can end a building business. This is the reference for the commercial cover a builder carries during a job, what each policy actually does, and how it differs from the compulsory home warranty schemes. General information, not insurance advice.
01 / Overview
What construction insurance covers
Construction insurance is the set of commercial policies that protect a building business against the things that can go wrong while a job is under way. It is not one product but several, each covering a different risk: damage to the works themselves, liability to other people, loss of the builder's own plant, and liability arising from professional or design work. Together they stand in for the ordinary home insurance that cannot cover a construction site, and they carry the losses that are too large for a business to absorb out of margin.
This page is about that commercial cover, held during the build. It is deliberately distinct from home warranty insurance, the compulsory, last-resort cover that protects the owner if the builder fails, which the site already covers in depth in the state-by-state home warranty guide and the per-state guides. Where warranty cover comes up here, this page points to those rather than repeating them. Everything below is general information, not insurance advice; the covers, limits and legal requirements differ by state, by contract and by business, and belong with a licensed broker.
Why it matters
Insurance is the one part of financial management that deals in losses no budget can absorb. A builder can control cost perfectly and still be finished by a site fire the week before handover, or a liability claim from an injury next door, if the cover is wrong or lapsed. The operator's observation is that the dangerous gap is rarely no insurance at all; it is the wrong assumption, that the compulsory warranty premium covers the works, that the owner's policy covers the build, that a subcontractor carries their own liability. Those assumptions are free right up until the loss that tests them.
02 / The covers
The four commercial covers on a build
Most residential builders carry some combination of these during a job. What is compulsory, what a contract demands, and what a prudent builder holds anyway are three different lists, and a broker maps them to the business.
Contract works
Sometimes called construction all risks or builder’s risk. Covers accidental physical loss or damage to the works, materials and often temporary works during construction, against fire, storm, theft, vandalism and the like, up to practical completion. The half-built house is uninsurable under a normal home policy, and this is the cover that stands in its place.
Public liability
Covers the builder’s legal liability for third-party injury or property damage arising from the work, a neighbour’s wall cracked by excavation, a passer-by hurt near the site. It is the cover clients, principals and councils most often demand proof of, and the one whose absence can stop a job starting.
Plant and equipment
Covers the builder’s own mobile plant, tools and equipment, excavators, scaffolding, generators, against theft and damage on site and in transit. For a builder who owns rather than hires, it protects assets the business depends on to keep working.
Professional indemnity
Covers liability arising from professional services, design, certification, advice, where the builder carries a design responsibility, as in a design-and-construct contract. A builder who only builds to someone else’s documented design may carry little; one who designs carries more.
03 / Drawing the line
What construction insurance is not
Several covers a builder holds are neither the commercial construction policies above nor interchangeable with them. Keeping them straight is half of getting insured properly.
Workers compensation is separate and compulsory
Cover for employees injured at work is a statutory scheme in every state, run under its own rules. It is a legal obligation for any builder with employees, and it sits outside the commercial covers described here.
The client’s home policy does not cover the build
A standard home and contents policy generally will not cover a half-built structure or the builder’s liability. Assuming the owner’s policy has it handled is a gap that surfaces only after something goes wrong.
The most common confusion is between contract works and home warranty. They are unrelated products protecting different parties. Home warranty is compulsory over a threshold in most states and protects the owner against the builder's death, disappearance or insolvency; it does nothing about a storm flattening the frame. Contract works protects the works during the build and does nothing about the builder going under. A builder needs to know which of their obligations are statutory, like home warranty eligibility and workers compensation, and which are commercial risk decisions, and to stop treating the word insured as if it were a single switch.
04 / Common mistakes
Where builders get the cover wrong
Insurance failures are quiet until a claim, and then total. Each of these is a gap between what a builder assumed was covered and what the policy actually says.
Confusing contract works with home warranty
The two are unrelated. Contract works covers accidental damage to the works during the build; home warranty protects the owner against the builder’s insolvency. A builder who thinks the compulsory warranty premium has the site covered can be uninsured for a fire the week before lockup.
Letting cover lapse over a long job
Contract works cover runs for a defined period. A job that overruns, exactly the job most likely to have a problem, can run past the cover’s expiry if the policy is not extended. The overrun that triggers liquidated damages can also be the one that ends the insurance.
Insuring for the contract sum, not the rebuild cost
A contract works sum-insured set to the original contract price can fall short of what it costs to reinstate work after a loss, once demolition, debris removal and cost escalation are added. Under-insurance is discovered at claim time, which is the worst time to discover it.
Not checking the subcontractor’s cover
A builder can be exposed by a subcontractor who carries no public liability of their own. Confirming subcontractors hold current cover, and keeping the certificates, is part of managing the builder’s own risk, not just theirs.
Treating premiums as overhead, not job cost
Insurance is a real cost of building, and project-specific cover belongs in the job’s cost of running the work, not lost in general overhead. A builder who never prices it into the job quietly erodes margin on every one.
Never reading the exclusions
Cover is defined as much by what it excludes as what it insures, faulty workmanship, design defects, wear and known risks are commonly carved out. A builder who assumes “fully insured” means everything is covered can find the one loss they have is the one the policy names.
05 / Best practice
How experienced builders manage cover
The builders who handle insurance well treat it as a managed part of running the business, not a certificate filed once a year. They use a broker who knows residential construction and can map the covers to the contracts they actually sign. They read the insurance clause in each building contract to see which covers they are obliged to hold and who carries what, rather than assuming. They check that the contract works sum-insured reflects the real cost to reinstate the work, including demolition and escalation, not just the contract price. And on a job that overruns, they extend the cover before it lapses, because the overrunning job is the one most likely to have the loss.
They also fold the cost into the job. Project-specific premiums are a real cost of running the work and belong in the preliminaries, priced into the job like any other site cost, so margin is not eroded quietly across every build. Insurance sits inside the same financial discipline as everything else on the financial management hub: a cost to be priced, and a risk to be transferred deliberately rather than discovered. Keeping subcontractor certificates of currency current, and holding the records where they can be produced, closes the last common gap. The specifics always go back to a licensed broker.
06 / FAQ
Common questions.
The commercial covers a building business typically carries during a job are contract works (for accidental damage to the works themselves), public liability (for third-party injury or property damage), plant and equipment (for the builder’s own machinery and tools), and, where the builder carries design responsibility, professional indemnity. Separately, a builder with employees must hold workers compensation, and in most states must arrange compulsory home warranty insurance over a threshold. The exact covers, limits and requirements depend on the business, the contract and the state, so treat this as general information and confirm with a licensed insurance broker.
They protect different people against different things. Contract works insurance protects the project during construction against accidental physical loss or damage, fire, storm, theft, damage to the partly built structure, and the builder is usually the one who benefits. Home warranty insurance (also called domestic building insurance in some states) protects the home owner if the builder dies, disappears or becomes insolvent and cannot complete or rectify the work. One is about accidents on a live site; the other is about the builder failing. A builder needs to understand both, and should not assume the compulsory warranty premium covers the site.
It depends on whether the builder carries professional or design responsibility. A builder working purely to a fully documented design prepared by others may carry limited professional exposure, while a builder offering design-and-construct, giving design advice, or certifying aspects of the work takes on liability that public liability cover generally does not reach. Professional indemnity responds to claims arising from the professional service itself. Because the line depends on the contracts a builder signs and the services they actually provide, whether and how much to carry is a question for a broker who understands the business.
Some of it is and some of it is commercial. Workers compensation is compulsory for any builder with employees, under each state’s scheme. Home warranty or domestic building insurance is compulsory over a threshold in most states and territories. Contract works, public liability, plant and professional indemnity are generally not compulsory by statute, but they are routinely required by building contracts, principals, lenders and councils, so in practice a builder often cannot start a job without them. What is legally required versus contractually required differs by state and by job, so confirm the specifics for your work.
It depends on the contract. Many standard residential building contracts require the builder to take out and maintain contract works and public liability cover for the project, and the premium is then a cost the builder prices into the job. Some contracts place the obligation on the owner or principal instead. The important thing is that the contract is read so the obligation is not assumed, because a gap where each party thought the other had it arranged is a gap discovered only after a loss. Confirm who carries which cover before work starts.
Insurance is both a cost and a risk transfer, so it belongs inside the financial picture, not beside it. The premiums for project-specific cover are a genuine cost of running the job and should be priced into it rather than absorbed as overhead. The cover itself protects the business from losses large enough to end it, a fire, a major liability claim, that no amount of good cost control can absorb. A builder who manages money well but carries the wrong cover, or lets it lapse on an overrunning job, has left the one risk that cannot be budgeted for uncovered. See the financial management hub for how the pieces fit together.
07 / Terms
Glossary for this topic
Contract works (cover for accidental damage to the works during construction, also called construction all risks or builder’s risk), public liability (cover for third-party injury or property damage), plant and equipment (cover for the builder’s own machinery and tools), professional indemnity (cover for liability from professional or design services), home warranty or domestic building insurance (compulsory last-resort cover protecting the owner against builder failure), workers compensation (compulsory cover for injured employees), sum-insured (the maximum a policy will pay), exclusion (a risk the policy does not cover). The wider vocabulary lives in the construction glossary.
The natural next articles are the home warranty insurance guide for the compulsory schemes, and statutory warranties and defects obligations for the rectification a builder owes after handover.
08 / Keep reading
Related knowledge, guides and features
09 / Further reading
Primary sources
- A licensed insurance broker experienced in residential construction, for the covers, limits and exclusions that suit your business and contracts. This page is general information only.
- Your state or territory building regulator and fair trading body, for compulsory home warranty and any statutory insurance obligations in your jurisdiction. See the home warranty guide.
- Your state workers compensation authority, for the compulsory scheme covering employees.
Price the risk, don’t discover it.
VIABUILD keeps the job’s costs, documents and site records on one understanding of the build, so project cover and its cost live inside the job rather than beside it, and the certificates are where you need them.