Demolition and Site Clearing: The Line Item That Is Actually a Licensed, Regulated Activity

On a subdivision job, a road widening or a council upgrade, the demolition and clearing work is usually a handful of lines near the front of the bill. Clear and grub. Remove existing pavement. Demolish existing structures. Remove existing fence. Each gets a rate, most of them get a rate built in about ninety seconds, and the crew turns up on day one to make a start on the easy part of the job.

It is not the easy part. Demolition is a licensed activity in most Australian jurisdictions, it is preceded by a mandatory hazardous materials assessment, it depends on service disconnections controlled by third parties, and its cost is dominated by a waste classification decision that nobody made at tender stage. It is also, being first, the work that sets whether the job starts on time.

This guide covers the regulatory and commercial shape of demolition and site clearing as a civil contractor encounters it: what you may do yourself, what you must engage others for, what has to happen before anything is touched, and where the money actually goes.

What hides inside two short bill items

Before the regulatory detail, it is worth setting out what the work actually contains, because the scope is systematically underestimated.

The bill says	What it can include
Clear and grub	Vegetation removal, tree felling, stump and root removal, topsoil strip and stockpile, removal of rubbish and dumped material, disposal of everything removed, and treatment of declared weeds
Demolish existing structures	Hazardous materials survey and removal, service disconnection, permits, structural demolition, footing and slab removal, backfill of voids, waste separation and disposal, and making good
Remove existing pavement	Sawcutting, breaking out, removal of subbase, classification of the material — which may be bound, may contain tar-based binders, and may not be clean fill
Remove existing services	Locating them, proving them dead, removing or abandoning in place, capping, and the asbestos-cement pipe question
Remove fencing and structures	Boundary agreement with the neighbour, temporary fencing to maintain security, stock control on rural sites, and disposal

Two items in that table are worth flagging now. Backfilling voids left by removed footings, slabs, tanks and pits is real work with real material, and it is very often not in anyone’s price. And the removed pavement is not automatically clean fill, a point that decides a large part of the disposal cost and is covered later.

Licensing: when a civil contractor needs a demolisher

Demolition work is licensed or otherwise regulated in Australian jurisdictions, generally with classes tied to the type and height of the structure and the method used. The classes, their thresholds and the licensing authority differ between states and territories, and some jurisdictions regulate demolition through general construction licensing or work health and safety authorisation rather than a standalone demolition licence.

This guide does not state the class boundaries, height thresholds or licence categories for any jurisdiction, for the same reason our guide to contractor licensing by state routes them: they vary, they change, and working from a remembered threshold is how a contractor performs unlicensed work. Confirm the requirement with the regulator or licensing authority for the state you are working in, for the specific structure.

What is generally true, and useful for planning, is the shape of the boundary.

• Minor structures and non-structural elements — fences, small sheds, slabs, kerbs, pavement — are typically within an ordinary civil contractor’s scope.
• Buildings, and structures above a defined size or height, generally require a licensed demolisher.
• Method matters as well as size. Demolition involving explosives, or the deliberate induced collapse of a structure, is separately and more tightly controlled.
• Load-bearing structural elements attract requirements that removing a non-load-bearing element does not.
• Work near or over other structures, roads or rail brings in the asset owner’s requirements on top of the licensing.

The practical consequence at tender stage: if the scope includes anything more than minor structures, either hold the licence or price a licensed subcontractor. Contractors get caught by assuming that a small building is within scope because it is small. The other trap is a contract requiring you to warrant that all work is performed by appropriately licensed persons — a warranty you breach the moment your own crew starts on a structure you were not licensed for, with consequences for your insurance as well as your compliance.

The hazardous materials survey that comes first

Before demolition of any structure of an age that might contain them, a hazardous materials survey is required. In practice this is the single most important sequencing fact in the whole subject: the survey happens before anything is touched, and its findings can change the cost of the work by an order of magnitude.

What it looks for goes well beyond asbestos.

• Asbestos in sheeting, roofing, pipework, insulation, vinyl backing, fencing and gaskets.
• Lead in paint, particularly on older steelwork and on bridges and structures being refurbished.
• Synthetic mineral fibres in insulation.
• Polychlorinated biphenyls in older electrical equipment, capacitors and light fittings.
• Ozone-depleting substances in refrigeration and air conditioning.
• Contaminated soils and residues around former storage areas, workshops and fuel installations.
• Underground storage tanks, which are their own removal problem with their own approvals.

Two commercial questions follow, and they should both be settled at tender stage. Who commissions the survey, and does it already exist? A tender that includes a hazardous materials report allows you to price the removal. A tender that requires you to demolish structures with no report attached is asking you to price an unknown, and the correct response is a clarification rather than a guess — the discipline in our guide to tender clarifications and the RFI window.

And what happens if something is found that the survey missed? Surveys are limited by access — material inside a wall cavity or under a slab may not be identified until demolition exposes it. The contract’s treatment of that discovery, and whether it falls within latent conditions relief, is a matter to check rather than assume; the framework is in our guide to latent conditions in civil contracts.

Asbestos, and the boundary you cannot cross

Asbestos removal is separately licensed in every Australian jurisdiction, with different licence classes for different material types, and the removalist must be licensed for the class of work being done. There are limited circumstances in which small quantities of non-friable material may be removed without a licence, and those circumstances are defined in the WHS regulations and codes of practice — with quantities and conditions that this guide does not reproduce, because relying on a half-remembered exemption is precisely how contractors end up prosecuted.

For civil contractors the encounters are predictable.

• Asbestos-cement water and sewer pipe in the ground. Extremely common in older reticulation, and the reason a straightforward pipe replacement becomes a licensed removal — see water and sewer pipeline tenders.
• Buried asbestos sheeting in fill, particularly on sites with a demolition history. This is frequently discovered by an excavator bucket, not by a survey.
• Asbestos-containing material in structures being demolished — the survey’s primary target.
• Asbestos in road pavements in isolated historical cases, and in bridge components.

Three rules that keep a civil contractor out of trouble. Stop work on suspicion, not on confirmation — the material is presumed to be asbestos until testing says otherwise, and continuing while you find out is the decision that causes exposure. Do not attempt to work out whether an exemption applies on the day, in the ground, with the job waiting; engage a licensed removalist. And notify. Licensed removal work carries notification requirements to the regulator, and the discovery also triggers obligations under the contract and possibly the notification pathway described in our guide to incident notification and investigation.

The broader regime for working on sites with contaminated or hazardous ground, including the air monitoring and clearance requirements, is covered in our guide to landfill and remediation civil works.

Service disconnection and abolishment: the programme killer

Nothing can be demolished until the services to it are dead, and this is the item that most often delays the start of a civil job — because it depends entirely on third parties working to their own timeframes.

The distinction that matters is between disconnection and abolishment.

• Disconnection makes the service safe at a point — the meter is removed, the supply is isolated. It may leave live infrastructure in the ground or on the pole.
• Abolishment permanently removes the connection back to the main. It is what is generally required before demolition, and it takes considerably longer.

Each utility has its own process, its own application form, its own lead time and its own charges.

• Electricity abolishment usually requires an application through a registered electrical contractor to the distribution network operator, and may require the pole or pillar to be attended. Where an overhead service crosses the site, the network operator’s requirements for working near it apply — see working near overhead powerlines.
• Gas abolishment is performed by the distributor and typically requires the meter and service to be cut back and capped.
• Water disconnection and sewer capping are handled by the water authority or a licensed plumber under its authorisation, and sewer capping in particular has requirements about how and where.
• Telecommunications is frequently the slowest, and the one contractors forget until the excavator finds the conduit.

These applications should be lodged at the earliest possible moment — ideally immediately at award, before mobilisation. They are the classic example of an early action with a long lead time and no cost to starting it, and they belong on the mobilisation checklist described in our guide to contract award and mobilisation.

Two further points. Verify rather than trust. A disconnection certificate is a document; proving the service is dead before anyone works on it is a separate step and a WHS one. And services that are not connected to the demolished structure still have to be located, because a shared trench or a service crossing the site does not appear on a disconnection application. Full service location — plans, electronic location, and potholing to prove — precedes any ground disturbance, as covered in our guide to utility and telecommunications civil works.

Planning approvals, heritage and the tree you cannot touch

Demolition and vegetation removal frequently require approvals that are separate from the construction approval, and the responsibility for holding them is not always where you assume.

• Demolition consent from the council or consent authority, which may be part of the development approval or a separate application.
• Heritage. A listed item, a heritage conservation area, or a structure of local heritage significance brings a wholly different process and can make demolition impossible. This applies to bridges, culverts and road structures more often than contractors expect.
• Aboriginal cultural heritage. Ground disturbance and the removal of structures on land with cultural heritage significance carries obligations that exist independently of any planning approval — covered in our guide to Aboriginal cultural heritage in civil works.
• Tree and vegetation controls. Council tree preservation orders, significant tree registers and state native vegetation law can each protect vegetation that the drawings show as removed — the subject of our guide to clearing, fauna and threatened species approvals.
• Waste facility approvals where material is being processed or stockpiled rather than removed.

The recurring error is treating a drawing as an approval. A tree shown with a cross on it has been drawn for removal by a designer; whether it may lawfully be removed is a separate question that the designer may not have resolved. The same applies to structures. Check the approvals register at mobilisation and identify the gaps then, when there is still time.

Structural demolition: method, sequence and engineering

Where the scope includes real structures, demolition is an engineered activity requiring a documented method, and often a structural engineer’s involvement.

• A demolition plan setting out the sequence, method, plant, exclusion zones and controls, prepared before work starts.
• Structural assessment. Understanding how the structure carries load, what is load-bearing, what provides lateral stability, and therefore what order elements may be removed in. Removing the wrong element first is how uncontrolled collapses happen.
• Temporary support and propping where stability is removed before the element itself is — an engineered temporary works item, as discussed in our guide to temporary works and excavation support.
• Exclusion zones sized for the method and the drop, and maintained.
• Plant selection and reach, including whether the machine can work from a position outside the collapse zone.
• Pre-weakening and induced collapse, which is specialised work with its own regulatory regime.

For bridge and structures work, add the asset owner’s requirements, the road or rail occupancy that the demolition needs, and the protection of what is underneath — a combination covered in our guides to bridge and structures tenders and rail civil works tenders. Demolition over or adjacent to a live road or rail corridor is usually the constraint that sets the entire programme, because it can only happen during an approved possession or closure.

Clearing and grubbing, and what the drawing does not show

Site clearing is priced by area and delivered by encounter, and the gap between the two is filled with things the survey did not pick up.

• Stumps and root balls. Removing a mature tree is straightforward; removing its root system from within the pavement footprint is a different activity generating a large void that must be backfilled and compacted.
• Dumped material. Rural and peri-urban sites routinely contain accumulated rubbish, old vehicles, farm chemicals and building waste, none of which is on the drawing and all of which is a waste classification problem.
• Buried structures. Old footings, septic systems, wells, tanks, and previous pavement layers.
• Topsoil. Depth varies, the volume to strip and stockpile is usually assumed rather than measured, and stockpile space is finite — a related consideration to the material balance in our guide to earthworks balance, mass haul and spoil.
• Declared weeds. Clearing through a declared weed infestation brings hygiene obligations — machinery washdown, restrictions on moving material off site, and sometimes a management plan.
• Fauna. Habitat trees and hollows may require a spotter-catcher and staged removal, which is a programme item.

The single most valuable action before pricing clearing work is walking the site, which is also the moment to record what you found. A photographic record of the site as tendered is the evidence base for any later argument about what was and was not visible.

Waste classification decides the price

Everything removed has to go somewhere, and where it can go is determined by how it is classified. Each Australian jurisdiction has its own waste classification framework with its own categories and its own assessment requirements, and the difference in disposal cost between the cleanest and the most restricted category is very large.

The materials that catch civil contractors out are consistent.

Material	The assumption	The reality
Excavated soil	Clean fill, disposed cheaply or reused	Requires assessment against the jurisdiction’s criteria; site history can make it a regulated waste
Broken concrete and brick	Recyclable, low cost	Usually correct, provided it is separated and free of contamination — which requires discipline on site
Old asphalt	Recyclable	Generally yes, but older material may contain tar-based binders that change the classification entirely
Mixed demolition waste	One skip, one price	Mixed loads attract the highest gate rates; separation at source is where the saving is
Vegetation and stumps	Mulched or burned	Burning is restricted or prohibited in many areas; mulching requires space and a use for the product
Asbestos-containing waste		Licensed transport and a facility licensed to receive it; tracked; and by a substantial margin the most expensive stream

The first row is the one that moves the most money on a civil job. Soil is not clean fill because it looks like soil — it is clean fill because it has been assessed against the criteria in the applicable jurisdiction, and on a site with any industrial, agricultural or filling history that assessment can go either way. Where the volume is large, the difference between assumed and actual classification is capable of consuming the entire margin.

Classify early. Sampling and assessment during the tender period, or immediately at award, converts the largest variable in the job into a known cost.

Levies, dockets and the paper trail that must survive

Most Australian jurisdictions apply a levy to waste disposed to landfill, charged per tonne and included in the gate fee. The rates differ substantially between states and between metropolitan and regional areas within a state, and they are adjusted periodically. This guide states no levy rates; take them from the current schedule published by the relevant state agency, and confirm the actual gate rate with the receiving facility, which is the number that matters.

Three commercial consequences.

• Disposal cost is dominated by the levy on ordinary waste streams, which is why diverting material to recycling is a genuine saving rather than an environmental gesture.
• Levy rates change, usually annually. On a long contract, disposal cost is an escalation exposure — the kind of input covered in our guide to rise and fall and cost escalation.
• Cross-border disposal is regulated. Moving waste between states to take advantage of a lower levy is subject to interstate waste transport controls, and it is not a strategy to adopt casually.

The record-keeping matters as much as the cost. Weighbridge dockets are the proof of lawful disposal, and they are the documents most likely to be lost. Keep them by load, reconciled against the removal record, and match them to the classification assessment. For tracked wastes, including asbestos and regulated waste, the tracking documentation is a legal requirement and a chain: consignment, transport, receipt. A gap in that chain is a compliance failure regardless of what actually happened to the material.

There is a second reason to keep them properly. Where disposal is a measured item or reimbursable, dockets are the payment evidence, and reconstructing them at final claim is one of the more common causes of an unpaid disposal cost — the general problem examined in our guide to practical completion, defects liability and the final claim.

Resource recovery targets in tenders

Government clients increasingly set diversion or recovery targets — a percentage of construction and demolition waste to be recycled rather than landfilled — and require reporting against them. On some contracts this is a scored criterion; on others it is a contractual obligation with reporting attached.

• Separation at source is what makes the target achievable. Concrete, brick, metal, timber and green waste separated on site go to different destinations at different rates; a mixed bin goes to landfill at the highest rate.
• On-site reuse is the strongest form of diversion — crushing concrete for use as a working platform or in pavement layers, where the specification permits and the material qualifies.
• Reporting requires the docket trail to be organised by stream from the beginning, not reconstructed.
• Metal has a resale value that is frequently ignored on civil jobs, and on structures work it is not trivial.

This connects to the broader sustainability requirements appearing in Australian civil tenders, including the material and emissions questions covered in our guides to sustainability and IS ratings and embodied carbon and decarbonisation. Demolition is where a contractor’s recovery claims are most easily verified, because the evidence is a stack of dockets — which makes it a good place to make a claim you can substantiate and a poor place to make one you cannot.

The WHS profile of demolition work

Demolition concentrates a set of high-risk activities into a short duration at the front of a job, frequently before site systems have settled.

• Structural collapse, controlled by sequence, engineering and exclusion zones.
• Falling objects and debris beyond the immediate work area.
• Working at height, and work on or near a structure that is being progressively weakened.
• Mobile plant and people in a confined working area with poor visibility.
• Hazardous materials — asbestos, lead, silica dust from concrete cutting and breaking.
• Noise and vibration from breaking, at levels that affect both workers and neighbours.
• Services, including those believed to be disconnected.
• Unplanned entry into voids exposed by demolition — pits, tanks and chambers that become confined spaces.

Most of this is high-risk construction work requiring a safe work method statement, and demolition is one of the categories where a generic SWMS is most obviously inadequate — the point made in our guide to WHS management plans and SWMS. Silica dust deserves specific mention, because concrete cutting, breaking and grinding are among the highest-exposure activities in civil work and the regulatory attention on respirable crystalline silica has been increasing across jurisdictions.

Neighbours, dust, noise and the pre-condition survey

Demolition is the most visible and audible thing that happens on a civil site, and it usually happens first — which means it sets the relationship with the neighbours for the rest of the job.

• A pre-condition survey of adjoining property before demolition begins is the control that prevents every pre-existing crack from becoming your liability. It is the same instrument discussed in our guides to noise, vibration and dust management and dewatering, water take and discharge, and demolition is one of the clearest cases for it.
• Dust suppression during the work, not after complaints. Water on the material as it comes down, not on the pile afterwards.
• Vibration from breaking, particularly on rock and heavy concrete, and particularly near older buildings.
• Notification before you start, with dates and a contact — the approach in our guide to community and stakeholder engagement plans.
• Site security. A partially demolished structure is an attractive nuisance, and the obligation to secure it does not stop at knock-off.

Pricing demolition and clearing

The consistently missed items, in rough order of how much money they represent.

• Disposal at the correct classification, not at clean fill rates, with the levy included.
• Hazardous materials removal, licensed, with air monitoring and clearance where required.
• The hazardous materials survey itself, where it is not provided.
• Backfill of voids left by footings, slabs, tanks and stumps, with imported material and compaction.
• Service abolishment charges from each utility, and the time to obtain them.
• Waste classification assessment — sampling, laboratory work and the assessor.
• Separation and handling to achieve recovery targets, including additional bins and site space.
• Licensed demolition subcontractor where the scope requires one.
• Temporary works and propping.
• Pre-condition survey and monitoring.
• Traffic management and site security for the demolition phase specifically.
• Dust and water supply.

Where the extent is genuinely unknown — and on demolition it very often is — the honest structures are a provisional quantity or a provisional sum, not an optimistic lump sum. Our guide to bills of quantities, provisional sums and PC sums covers how these behave when the work is measured.

What a tender response has to show

Demolition rarely carries its own criterion, but where it is a significant part of the scope, evaluators look for a specific set of things.

• The licensing position — what you hold, what you subcontract, and to whom.
• The sequence, starting with the survey and the service applications, which demonstrates that you know what comes first.
• The hazardous materials approach, including what happens on an unexpected find.
• Waste classification and the disposal strategy, with the destinations named.
• Recovery and diversion, with a method for evidencing it rather than a percentage claim.
• Neighbour management — pre-condition survey, dust, noise, notification.
• The assumptions you have priced on, stated plainly. On demolition this is not weakness; it is the only honest way to price an unknown, and evaluators who understand the work know it.

Checklist

• Have you confirmed with the licensing authority whether the structures in scope require a licensed demolisher?
• Does the contract require you to warrant that all work is performed by licensed persons?
• Has a hazardous materials survey been provided, and if not, who commissions it and when?
• Do you know what the contract says about materials discovered that the survey did not identify?
• Is a licensed asbestos removalist engaged for the class of work involved?
• Does the crew know to stop on suspicion rather than on confirmation?
• Have service abolishment applications been lodged with every utility, at award?
• Do you know the lead time for each, and is it on the programme?
• Has full service location been done, including services not connected to the demolished structure?
• Are demolition consent, heritage, cultural heritage and vegetation approvals in place, and who holds them?
• Have you checked that trees shown for removal may lawfully be removed?
• Is there a documented demolition plan with sequence, exclusion zones and plant?
• Has a structural engineer assessed stability and temporary support where required?
• Has the site been walked, and is there a photographic record of what was visible at tender?
• Has excavated material been assessed against the jurisdiction’s waste classification criteria?
• Have you priced disposal at the correct classification, including the levy, at the actual gate rate?
• Is there a system for capturing and reconciling weighbridge dockets by stream?
• Are tracked waste consignment records complete and retained?
• Is separation at source planned, with the space and bins to do it?
• Have void backfill, imported material and compaction been priced?
• Has a pre-condition survey of adjoining property been completed before work starts?
• Is dust suppression applied during demolition rather than after complaints?
• Is silica dust specifically addressed for cutting, breaking and grinding?
• Is the partially demolished site secured outside working hours?

Sources and further reading

This guide is general information for Australian civil construction businesses and is not legal, work health and safety, environmental or licensing advice. It deliberately states no demolition licence class thresholds, asbestos removal exemption quantities, waste classification criteria or waste levy rates; those are set by the licensing authority, work health and safety regulations and codes of practice, and environment protection legislation in each jurisdiction, they differ between states and territories, and they change. Confirm licensing requirements with the relevant authority for the specific structure before commencing any demolition. Asbestos removal is licensed work and the limited unlicensed exemptions must be assessed against the current regulations rather than from memory. Waste classification requires assessment against the applicable jurisdictional framework and, in many cases, a suitably qualified assessor. Demolition of structures is engineered work requiring competent structural assessment. Whether an unexpected discovery constitutes a latent condition is a matter for advice on the specific contract and facts.

• Demolition licensing and authorisation frameworks across Australian states and territories, referenced in §02. Jurisdictions regulate demolition differently — some through a dedicated demolition licence with classes tied to structure type, height and method, others through general construction licensing or work health and safety authorisation. No class boundaries or thresholds are reproduced here; the licensing authority for the state of the works is the source, and the related general position is covered in our guide to contractor licensing by state.
• Work health and safety regulations and codes of practice governing demolition work, asbestos removal licensing and classes, hazardous materials identification prior to demolition, and high-risk construction work requiring a safe work method statement, referenced in §03, §04, §07 and §12. Asbestos removal licensing classes and the limited circumstances permitting unlicensed removal of small quantities of non-friable material are set out in the regulations and codes in each jurisdiction; quantities and conditions are deliberately not reproduced.
• Waste classification frameworks and landfill levies referenced in §09 and §10 are established by environment protection legislation in each jurisdiction, with classification categories, assessment requirements, tracking obligations for regulated wastes, interstate transport controls and levy rates all differing between states and, within states, between metropolitan and regional areas. Levy rates are adjusted periodically; the current schedule published by the state agency and the actual gate rate quoted by the receiving facility are the operative figures.
• Utility disconnection and abolishment processes referenced in §05 are administered by individual distribution network operators, gas distributors, water authorities and telecommunications carriers, each with its own application process, lead time and charges; the relevant provider is the source for the site in question.
• Related TenderBuilt guides carrying the primary-source detail referenced above: WHS management plans and SWMS, landfill and remediation civil works, utility and telecommunications civil works, water and sewer pipeline tenders, working near overhead powerlines, temporary works and excavation support, Aboriginal cultural heritage in civil works, clearing, fauna and threatened species, earthworks balance, mass haul and spoil, noise, vibration and dust management, bridge and structures tenders, latent conditions, contract award and mobilisation and bills of quantities, provisional sums and PC sums.