"Demolition is demolition" is the kind of phrase a homeowner thinks before they hire a contractor whose only experience is residential, then realise the warehouse or office strip-out across town runs by completely different rules. Commercial and residential demolition share the same basic engineering principles but almost nothing else — different permits, different machinery, different working hours, different insurance, different neighbour considerations. Here is what actually separates them.
Scale
The most obvious difference. A typical residential demolition is one building of 200–400 m². A typical commercial demolition might be a 5,000 m² warehouse, a 12-storey office strip-out, a multi-tenancy retail centre, or a factory complex covering hectares.
Scale changes everything:
- Equipment — 35-tonne excavators with high-reach attachments, not 14-tonne machines
- Truck rotation — dedicated truck fleets working continuously, not single-truck rotation
- Crew size — 10–30 person teams across multiple shifts, not 3–5 person teams
- Programme — 8–20 weeks on site, not 2–4 weeks
Permits and approvals
Commercial demolitions usually trigger more complex permitting:
- WorkSafe construction site notification — automatic for projects above the value threshold
- Environment Protection Authority engagement — for sites with potential contamination, larger waste volumes, or environmental sensitivity
- Fire authority notification — for sites with combustible materials, large volumes, or specialised hazards
- Council planning — often more involved than residential due to streetscape, parking, traffic implications
- Building permit — same regulation as residential but often more complex documentation
Working hours
Residential demolitions work standard council hours — typically 7am to 6pm weekdays, half-day Saturdays. Commercial work often happens outside these hours by design:
- After-hours strip-outs — office buildings demolished overnight while tenants in adjacent floors continue trading by day
- Sunday work — special permit for non-disruptive activities
- Public holiday work — common for retail centres demolishing during quiet trading periods
After-hours work requires specific council permits, additional notification to surrounding businesses, and noise management plans. The premium for after-hours work is real but justified by the alternative of disrupting trading.
Machinery
| Machine | Residential | Commercial |
|---|---|---|
| Excavators | 5–14 tonne | 20–80 tonne, high-reach attachments |
| Wreckers | Rare | Wrecking ball cranes for some structures |
| Concrete crushers | Often offsite | Often on-site for recycling |
| Skid steers | Rare | Common for material movement |
| Dust suppression | Water spray | Dedicated water trucks, sometimes dust monitoring |
Commercial demolitions also frequently use specialised attachments — pulverisers for concrete reduction, shears for steel, hammers for stubborn rock, grapples for sorting recyclables. Equipment detail.
Insurance and bonding
Residential demolitions typically require:
- Public liability insurance ($20m typical)
- Workers compensation
- Asset protection bond ($1k–$5k)
Commercial demolitions often require significantly more:
- Public liability ($50m+ for major projects)
- Professional indemnity
- Performance bonds (typically 5–10% of contract value)
- Environmental impairment insurance for contaminated sites
- Project-specific insurances for unusual exposures
A residential demolition contractor without commercial experience can quote a warehouse job, but the systems, paperwork, and capacity required usually expose them mid-project. Always confirm a contractor's commercial track record before awarding commercial work.
Recycling and waste streams
Residential demolitions typically achieve 70–85% recycling rates with three or four primary streams (concrete, metal, brick, timber). Commercial demolitions can hit 90%+ with more sophisticated separation:
- Concrete crushed on-site and reused as road base
- Steel sorted by grade for direct recycling
- Aluminium and copper separated for value recovery
- Brick salvaged for resale (heritage and architectural)
- Timber separated by treatment status
- Plasterboard sent to dedicated gypsum recyclers
- Carpet, ceiling tiles, and fit-out items to specialised processors
Higher recycling rates reduce tip fees, and the value recovery on metals and salvaged materials can offset 5–15% of demolition costs on commercial projects.
Neighbour management
Residential neighbour management is one-on-one — you knock on doors, you exchange phone numbers, you address complaints individually. Commercial neighbour management is structured:
- Stakeholder engagement plan documented before works start
- Regular communication (weekly newsletters, dedicated phone line)
- Adjacent business liaison — often with formal coordination meetings
- Public consultation for high-profile sites
If your commercial demolition is near operating businesses, expect serious neighbour management work. Trading-adjacent demolition detail.
Site programmes
Commercial programmes are formal documents — Gantt charts, milestone schedules, weekly progress reports, look-ahead schedules. The programme is a contract document and progress is measured against it formally. Variations require formal Extension of Time claims.
Residential programmes are typically less formal — a working-day estimate and a target completion date, with progress communicated by phone or text.
Pricing structure
Residential demolitions are usually fixed-price for a specified scope. Commercial demolitions can be:
- Fixed-price (lump sum) for fully-defined scope
- Schedule of rates for variable-scope work
- Cost plus fee for complex or unknown projects
- Target cost contracts with shared risk
The contracting form is itself a meaningful negotiation point on commercial work, and getting it wrong creates disputes later.
Choose the contractor that matches the project
The same logic applies to either: hire a contractor whose track record fits the work. Choosing a contractor. A good residential contractor and a good commercial contractor are both excellent at their work, but they're not interchangeable. Ask specifically about projects of similar type, scale, and complexity to yours, and ask for references that match.
The shared fundamentals
Despite all the differences, both share the same core principles: licensed, insured, permitted, planned, supervised. A good demolition is a good demolition whether it's a Brunswick brick veneer or a Footscray warehouse. The difference is in the systems around the work, not the work itself.
