What licences and permits do I need for excavation work in Australia?

The licences you need for excavation in Australia depend on the state and the job value. Most states regulate excavation under their builder or trade-contractor licensing once the contract crosses a threshold, from $3,300 in Queensland to $20,000 in Western Australia¹. Every dig also requires a Before You Dig referral, a White Card and a written SWMS for trenches 1.5 metres or deeper.

Updated 01/10/2026.

Is excavation a licensed trade in Australia?

In most states, no. Excavation is not a separately licensed occupation the way plumbing or electrical work is. It is regulated as building work or construction work under each state's builder or trade-contractor licensing scheme, and the licence requirement kicks in when the contract value crosses a threshold.

The exception is Victoria, where the Building and Plumbing Commission (BPC, formerly VBA) maintains a specific Domestic Builder (limited) registration class for earthworks and excavation. Queensland's QBCC also licenses excavation-adjacent work under its structural landscaping and concreting trade-contractor classes.

This matters for your marketing. Claiming "licensed excavator" on your website or ute is a representation under ACL s18 (misleading or deceptive conduct) in every state where no such trade licence exists. In Tasmania, the ACT and the Northern Territory, excavation is explicitly unlicensed, so the claim cannot be substantiated. In WA and the NT, builder registration exists at the project level but no standalone excavation trade licence is issued. For a broader look at the advertising traps that catch trade businesses, see our guide to tradie marketing compliance.

What are the licensing thresholds state by state?

The dollar threshold at which you need a builder or trade-contractor licence to contract directly with a homeowner for excavation work varies significantly. Below the threshold, the work may be done without a licence (but all other obligations, BYDA, WHS, insurance, still apply). Above it, doing the work without a licence is an offence.

Sources: QBCC available licences register, NSW Fair Trading building and trade licences, VBA registration classes, CBS SA Building Work Contractors Act 1995, WA Building and Energy, CBOS Tasmania, NT Building Practitioners Board, Access Canberra construction licences consultation (all accessed 2026, directional). Thresholds are periodically indexed. Confirm the current figure with the relevant authority before relying on it.

What is Before You Dig and why is it mandatory?

Before You Dig Australia (BYDA), reached by calling 1100 or lodging online at byda.com.au, is a free pre-excavation utility-locate referral service². When you lodge a request, every utility owner with assets in the area must respond with plans showing the location of their pipes, cables and conduits.

There is no single national Act that makes a BYDA referral compulsory. Instead, the obligation sits inside the general WHS duty of care: a person conducting a business or undertaking (PCBU) must eliminate or minimise risks so far as reasonably practicable. Excavating without knowing what is underground is not reasonably practicable risk management. The same principle applies to pricing a concrete slab, where site conditions drive the real cost.

• Strike liability. If you hit a gas main, water main, telecommunications cable or power cable without having lodged a BYDA referral, you carry the repair cost, face a potential WHS prosecution, and your insurer may decline the claim for failure to take reasonable precautions.
• Prosecution risk. State WHS regulators have prosecuted excavation contractors for failing to locate underground services before digging. The cost of a BYDA referral is zero. The cost of a gas-main strike runs into tens of thousands before any penalty.
• Practical step. Lodge the BYDA referral as soon as you accept the job. Plans typically arrive within two business days. Pothole (hand-dig or vacuum excavation) to confirm service locations before any machine work near a marked asset.

When do I need a Safe Work Method Statement for excavation?

Under the model Work Health and Safety (WHS) Regulations adopted by all states and territories except Victoria (which runs its own OHS Act 2004), any excavation to a depth of 1.5 metres or more is classified as high-risk construction work (HRCW)³. A written Safe Work Method Statement (SWMS) must be prepared, understood by all workers on site, and kept on site before any HRCW begins.

The underlying duty is broad. As Safe Work Australia states in the model WHS Act, section 19: "A person conducting a business or undertaking must ensure, so far as is reasonably practicable, the health and safety of workers, and that the health and safety of other persons is not put at risk from work carried out as part of the conduct of the business or undertaking." This duty applies to every excavation contractor, sole trader or company, regardless of whether a SWMS is triggered.

A SWMS is not a generic safety plan. It identifies the specific high-risk work, the hazards (trench collapse, underground services, groundwater, falling objects), the control measures (shoring, benching, battering, exclusion zones, emergency rescue), and who is responsible.

• Below 1.5 metres. A SWMS is not legally required but a site-specific risk assessment is still expected under the PCBU's general duty of care (WHS Act s19). Soil type, groundwater and surcharge loads can make a shallow trench dangerous.
• Trench shoring and benching. The Safe Work Australia Code of Practice for Excavation Work sets minimum requirements for shoring, benching and battering based on depth and soil classification. A trench deeper than 1.5 metres in anything other than stable rock requires engineered support or a benched/battered profile.
• Victoria. Victoria's OHS Act and Regulations impose equivalent duties under different section numbers. The 1.5-metre trigger and the requirement for documented risk controls apply in practice, even though the drafting differs from the model law.

What other permits and tickets do I need?

Beyond the builder or trade-contractor licence and the BYDA referral, excavation work commonly requires these permits and tickets.

• White Card (CPCWHS1001). Every person carrying out construction work on an Australian construction site must hold a current general construction induction card, the White Card. This is a national unit delivered by registered training organisations, valid across all states.
• Building permit or development approval. Excavation for a new build, a swimming pool, a retaining wall over approximately one metre, or any work near a boundary typically triggers a building permit from the local council or a private building surveyor. The permit is the landowner's obligation, but starting work without one exposes the contractor to stop-work orders and penalties.
• Council road-opening or crossover permits. If the excavation crosses a footpath, nature strip or road reserve (for a driveway crossover, stormwater connection or service trench), you need a road-opening permit from the local council. Conditions usually include traffic management, reinstatement and a bond.
• Environmental and sediment controls. State EPA legislation and council conditions require sediment and erosion controls on any soil-disturbing work. Silt fencing, stockpile covering, stormwater inlet protection and dust suppression are standard obligations. A sediment discharge into a waterway is an offence under state environmental protection Acts.
• Tree-protection orders. Excavation within the tree-protection zone (TPZ) of a significant or protected tree may require an arborist report and council approval. Local tree-preservation orders and state native-vegetation laws restrict root-zone disturbance.

What insurance does an excavation contractor need?

Insurance requirements sit alongside licensing and are not optional for most excavation businesses.

• Public liability. Not strictly a statutory requirement in every state, but practically universal. Typical cover is $10 million to $20 million⁴. Most head contractors and principal contractors require proof of current PL before you step on site.
• Workers compensation. Mandatory in every state and territory the moment you employ anyone, including labour-hire and some deemed-worker arrangements. Sole traders with no employees are generally exempt but should carry personal accident cover.
• Home warranty or builders warranty insurance. Triggered when excavation is part of residential building work above the state's threshold. In NSW, the Home Building Compensation Fund applies to residential work over $20,000; in Victoria, Domestic Building Insurance applies over $16,000; in Queensland, the QBCC Home Warranty Scheme levy applies over $3,300⁵. The builder (or the contractor dealing directly with the homeowner) takes out the policy before collecting any money or starting work. Our home warranty insurance guide covers the thresholds and claim windows in detail.
• Plant and equipment insurance. Not a regulatory requirement but a commercial necessity. A mini excavator costs $50,000 to $150,000 to replace (replacement cost range based on new and used AU dealer listings, directional). Theft, transport damage and mechanical breakdown are the common claims.

What are the penalties for unlicensed or non-compliant excavation work?

Penalties are stated as statutory maxima for context only. Actual penalties imposed by courts and tribunals are lower and depend on the circumstances. This is advisory, not legal advice. Seek advice from a lawyer or the relevant state licensing authority for your specific situation.

Sources: NSW Home Building Act 1989, VBA penalty schedule (FY2025-26 penalty unit value), QBCC Act, Safe Work Australia model WHS Act (indexed as at 01/07/2024), ACCC fines and penalties page and Treasury Laws Amendment (Doubling Penalties for ACCC Enforcement) Act 2026 (all accessed 2026, directional). Penalty-unit values are indexed annually and state figures diverge. Confirm the current figure with the relevant regulator before relying on it.

How does this affect what I put on my website?

The licensing landscape creates a specific advertising trap for excavation businesses operating across state lines or advertising online to a national audience.

• Do not claim "licensed excavator" unless you hold a licence that says so. In states where no standalone excavation trade licence exists (TAS, ACT, NT, WA), the claim is a false representation under ACL s29 (false or misleading representations about approval or affiliation). Frame it accurately: "registered builder" where you hold a builder registration, or "QBCC licensed" where you hold a QBCC trade-contractor licence.
• Do not overstate insurance or warranty cover. Claiming comprehensive insurance cover is only accurate if your public liability, workers compensation and (where triggered) home warranty insurance are all current and match the scope of work you advertise. An expired or mismatched policy makes the claim misleading under ACL s18.
• Quote accurately. A quote is a fixed price under the ACL. If your excavation price depends on rock, soil conditions or service relocations you have not yet assessed, call it an estimate and state the assumptions. A price that quietly doubles after acceptance is an ACL s18 risk. For quoting discipline that protects your margin and keeps you compliant, see our tradie quoting tips.

If you are unsure whether your current claims are substantiated, a 15-minute discovery call can identify the gaps before they become a compliance issue. Book a free 15-minute discovery call.

A practical compliance checklist for excavation contractors

Use this as a starting point. It does not replace legal advice, and council and state requirements vary.

• Licence current and displayed. Confirm your builder or trade-contractor licence (where required) is current and matches the state you are working in.
• BYDA referral lodged. Lodge the Before You Dig referral as soon as the job is confirmed. Do not start until plans arrive and services are marked or potholed.
• White Card held by every person on site. Keep a copy in the site file.
• SWMS prepared for digs 1.5 metres or deeper. Specific to the site, signed by all workers, kept on site.
• Building permit obtained (where triggered). Confirm with the council or building surveyor before starting.
• Insurance current. Public liability, workers compensation (if employees), home warranty (if above threshold and contracting to homeowner).
• Sediment and erosion controls installed. Silt fence, stockpile cover, inlet protection before any soil disturbance.
• Tree-protection zones identified. If excavating near significant trees, get an arborist report and council clearance.
• Website and advertising claims substantiated. Remove any "licensed" claim you cannot back with a current licence number for the state the customer is in. The same state-by-state trap applies to roofing licensing.