What a house demolition actually involves
Approval. Depending on the property and the zone, demolition may proceed as complying development with a certificate issued by an accredited certifier, or it may need development consent from council. Heritage listing or a conservation area changes this, as do some overlays. The approvals page sets out the pathways.
Survey and assessment. For any pre-1990 house, a hazardous materials survey comes first. In the Illawarra that is not a formality — see asbestos below.
Disconnections. Power, gas, water, sewer and telecommunications, formally disconnected or made safe. Councils generally want evidence. This is routinely the longest lead item.
Site set-up. Fencing and hoarding, sediment controls, protection for adjoining property, and traffic management if material is being loaded from the street.
Demolition. Two to four days for a typical house, machine-led, with material separated as it comes down rather than mixed into a single load.
Disposal and clean. Loads out, slab and footings removed where in scope, block levelled.
Where the cost sits
Two lines dominate a house demolition quote, and neither is the machine time.
Disposal. Charged by weight and split by material stream, with different rates for clean concrete, mixed waste, timber and asbestos-containing material. A house is heavier than people expect. The quote should state the tonnage assumption it is built on and what happens if the block delivers more than that — because on demolition, it sometimes does.
Hazardous material. Asbestos removal is separately licensed work, quoted by a licensed removalist, and it is not a small line. On a fibro house it can be a significant share of the total. Any quote on a pre-1990 Illawarra house that does not address asbestos is incomplete.
After those: access, storeys, whether the slab is going, and how much of the block has to be reinstated.
Access on an Illawarra block
The narrow coastal strip below the escarpment produces genuinely constrained sites. The older suburbs on the northern line — Thirroul, Austinmer, Bulli, Corrimal — have tight frontages, steep driveways and laneways that will not take a truck. Older parts of Wollongong, Port Kembla and Warrawong are similar.
Constrained access means smaller machines, more truck movements, and sometimes loading from the street under a permit. It is a real cost difference and it should be priced from the site rather than assumed.
Newer land through Dapto, West Dapto, Shell Cove and Calderwood is the opposite — open blocks, straightforward staging, fewer movements.
Knock-down rebuild
Most house demolition in the Illawarra is the first stage of a rebuild. Two things are worth coordinating early.
Talk to your builder about what the block needs to look like at handover. A builder who wants the slab gone and the site levelled to a particular height should say so before the demolition is quoted, not after.
Second, keep the survey and the service locations. Knowing where the sewer junction and the water main sit saves real money at the build stage, and that information is easiest to capture while the site is open.
The neighbours
On the tighter Illawarra blocks the adjoining house can be very close, and protecting it is part of the job rather than a courtesy.
Expect hoarding along shared boundaries, protection or removal of shared fencing, dust suppression, and controls to stop material or vibration reaching next door. Councils frequently require a dilapidation report on adjoining properties before demolition begins — a documented record of their existing condition, which protects you as much as it protects them. Without one, any pre-existing crack in a neighbour's wall can become your problem.
Notice matters too. Neighbours who know what is happening and roughly how long it will take are far easier to work alongside than neighbours who wake up to an excavator. It costs nothing and it prevents most of the disputes that arise on residential demolition.
What we quote
A written price with the disposal assumption stated, the asbestos position explicit, the approval pathway explained, and a variation process in writing. Related: site clearing, concrete removal and pool removal where they are part of the same job.
Call 02 4214 4202 or send the site details through.
Frequently asked questions
How much does house demolition cost in the Illawarra?
As a 2026 planning guide, a straightforward single-storey house on an accessible block generally runs $18,000 to $30,000, and a two-storey or difficult-access job $28,000 to $50,000 or more. Asbestos removal is priced separately by a licensed removalist and can add substantially. Disposal volume and site access explain most of the variation within those bands.
How long does the whole process take?
The demolition itself is typically two to four days on site. The lead time in front of it is the real timeline: service disconnections commonly take several weeks, and the approval pathway — a CDC through a certifier or development consent from council — can take longer again. Four to eight weeks from decision to machines on site is a realistic expectation.
Do the services need to be disconnected first?
Yes, and formally. Electricity, gas, water, sewer and telecommunications all need to be properly disconnected or made safe by the relevant authority or an accredited provider before demolition starts, and councils generally require evidence of it. Disconnection lead times are one of the most common causes of a delayed start, so they should be initiated as soon as the approval pathway is clear.
What condition is the block left in?
It should be level, clear of demolition material, with the slab removed if that was the scope, and clean enough for a surveyor to peg out. Ask specifically whether the slab, footings, driveway and any retaining structures are included — those are the items most often left behind on a cheap quote and they are expensive to deal with afterwards.
Can I salvage anything before demolition?
Usually, if it is arranged in advance and there is time in the program. Fittings, bricks, timber, roof tiles and appliances can be worth removing beforehand. Be realistic about the labour involved, and note that anything requiring the removal of material that may contain asbestos is not a DIY salvage job.