Quick Answer

Excavation services with DemoEx in the Illawarra:

  • Excavator + operator: $120 – $200 per hour (mini through to mid-size)
  • Tipper truck: add hourly truck rate for spoil removal
  • Tip fees: charged separately based on soil type and quantity
  • Fixed-price quotes available for defined-scope jobs (pool excavation, slab cut, footings)

The team services the Illawarra, South Coast as far as Kiama, and Southern Highlands including Bowral for residential, commercial, and civil excavation.

What Is Excavation?

Excavation is the controlled removal of soil, rock, or other material from a site — usually to prepare for construction, install services, or shape the land. In the Illawarra, common excavation jobs include:

  • Site preparation for new builds — cutting and filling to create a level building pad
  • Pool excavation — digging the pool shell to engineered specifications
  • Footings and slabs — trenching for strip footings or excavating for raft slabs
  • Driveways and retaining walls — cutting batters, preparing sub-base
  • Service trenches — water, sewer, gas, stormwater, conduit
  • Bulk earthworks — large-scale cut/fill on commercial or subdivision sites
  • Demolition site clearance — removing slabs, footings, and contaminated soil after demolition
  • Land clearing and forestry mulching — specialist attachments for vegetation and scrub clearing

Soil and Ground Conditions in the Illawarra

The Illawarra has highly variable ground conditions, which directly affects excavation cost and method:

  • Coastal areas (Wollongong, Port Kembla, Warilla) — mixed sand and clay, sometimes with fill from old industrial use. Watch for contamination.
  • Escarpment foothills (Mt Keira, Mt Kembla, Helensburgh) — shallow soil over Hawkesbury sandstone. Rock breaking is often required.
  • Floodplain areas (parts of Dapto, Albion Park) — alluvial clay with high water tables. Dewatering may be needed.
  • Acid sulfate soil zones — parts of the lower Illawarra. Disturbing acid sulfate soils triggers NSW EPA management requirements and adds cost.
  • Southern Highlands (Bowral and surrounds) — basaltic and shale soils, with shallow rock common near the escarpment.

We always recommend a soil report from a geotechnical engineer for any significant excavation, especially near the escarpment.

Do I Need a Permit to Excavate?

It depends on what, where, and how deep:

No permit required (usually):

  • Excavations under 1 metre deep on your own property
  • Pool excavation as part of an approved pool construction
  • Footings within an approved building application
  • Garden landscaping

But: Dial Before You Dig (1100 — free service) is mandatory before any excavation, however small. It identifies underground services — power, gas, water, sewer, telecoms, NBN. Hitting one of these can cost $5,000 to $50,000+ in repairs, and you’re liable.

Permit or approval required:

  • Excavation that affects a neighbouring property
  • Excavation near boundaries
  • Excavation in flood-prone areas
  • Excavation in heritage zones
  • Excavation that disturbs more than 250 cubic metres on a single site
  • Any excavation as part of a build — covered under your Construction Certificate

How Excavation Is Priced

Hourly rate

Most jobs with uncertain scope, soft ground variations, or unknown obstacles are priced hourly. DemoEx excavator rates are $120 to $200 per hour (machine + operator + fuel), depending on machine size required. You pay separately for:

  • Truck cartage (per hour, or per load)
  • Tip fees (per tonne, varies by soil type — disposed of at EPA-approved locations)
  • Float/transport to deliver large machines (one-off charge)
  • Saturday / outside-hours penalty (typically 1.5×)

Fixed price

For well-defined scopes — pool excavation to engineered drawings, a defined site cut, a known volume of bulk earthworks — fixed price is preferred. You’ll need a site survey, engineering drawings, confirmed access, and known soil conditions.

What can blow out an excavation budget

  • Rock — sandstone and basalt are slow going; hammer attachment adds time and cost
  • High water table — dewatering adds plant and running costs
  • Unexpected fill — contaminated fill must go to an EPA-approved disposal facility at higher rates
  • Access — tight sites need smaller machines, which take longer
  • Acid sulfate soils — trigger specific management requirements under the NSW EPA

Equipment

DemoEx operates excavators and skid steers with a broad attachment network — rock breakers, augers, mulching heads, and more. For jobs requiring larger plant or specialist equipment, we coordinate through our network to keep the job moving without delays.

Pool Excavation

Pool excavation requires engineering drawings specifying the pool shell dimensions, plus confirmation of soil conditions and access. DemoEx works alongside your pool builder to hand over a clean, compacted excavation ready for formwork. Typical pool excavation in the Illawarra takes 1–3 days depending on soil and access.

Building Pad Preparation

A typical process for a new residential building pad:

  1. Set-out by surveyor — confirm boundaries and finished floor level
  2. Strip topsoil (typically 100–300mm)
  3. Cut to level — excavate to engineering levels
  4. Compact and proof-roll — confirm the pad is stable for slab works
  5. Service trenches — water, sewer, stormwater rough-in if specified
  6. Hand back to slab/footing crew

A typical 200m² building pad takes 2–5 days and costs $4,000–$12,000 depending on slope and soil. Sloped sites with significant cut/fill cost more.

Frequently Asked Questions

Can you remove a tree stump?

Yes — stump grinding or excavation depending on size and location. Often packaged with site clearance.

Do you provide tipper trucks?

Yes. Tipper trucks for spoil removal are arranged in-house or through our network, keeping coordination simple.

What if you hit rock?

We discuss it before swapping methods. Hammer attachment on the excavator is the usual approach for sandstone. We document any rock works for variation pricing on hourly jobs.

Do you handle dewatering?

For most residential dewatering, yes. For larger commercial dewatering with discharge controls, we coordinate specialist dewatering crews.

What licences do you hold for excavation?

NSW Fair Trading Contractor Licence 380169C (Excavator class, valid to 20 February 2027), plus SafeWork NSW Restricted Demolition Licence AD214216 and $20 million public liability insurance through QBE (policy 12TI039773ISP).

Service Area

DemoEx covers excavation across a ~55 km radius from Unanderra:

Wollongong, Port Kembla, Dapto, Albion Park, Shellharbour, Warilla, Kiama, Helensburgh, Bulli, Thirroul, Corrimal, Unanderra, Figtree, Mount Keira, Berkeley, Warrawong, Gerringong, Jamberoo, Berry, Bowral, Mittagong, Moss Vale, and surrounding areas.

Get a Quote

Call 0457 336 639 or submit an enquiry. We attend site same day in the Wollongong area, next day for Kiama, and 2–3 days for the Bowral / Southern Highlands area. Written quotes within 24 hours of the site visit.