A quote should be specific enough to build the contract on. On a knockdown rebuild in Adelaide that is harder than on vacant land, because an established block with a house on it carries a category of work that simply does not exist on an empty site — and some of it cannot be measured until the house is gone.
Demolition is a scope, not a line item
What comes down is a decision, not a given. A block usually holds more than the house: a shed or garage, driveway and paving, fencing, a pool, retaining, established trees. Each is separately in or out, and each changes the price and the programme.
The boundary questions are the ones worth settling in writing. Whether a shared fence comes out and who rebuilds it. Whether a driveway crossover stays. Whether paving is removed or left for the new works to deal with. A scope that says "demolition" and stops has deferred all of those rather than answered them.
Asbestos: identified before it is priced
Housing of a certain age can contain asbestos in sheeting, eaves, roofing and floor coverings. Whether it is present, where, and in what condition are questions answered by inspection of the actual building, not by its age.
Removal is regulated work with licensing requirements that depend on the type and quantity of material. Because both the extent and the category follow from what an inspection finds, the workable treatment in a quote is to state how it will be established and how it will be priced once established, rather than to carry a number that was never based on the building.
Services have to be dealt with twice
Electricity, water, sewer and gas all arrive at an occupied house and all have to be dealt with before it comes down. That is not the same work as connecting the new house afterwards, and the two are separately scoped and separately timed.
Disconnection is handled by the relevant utility or network operator to their own process and their own lead time, which is why it tends to sit on the critical path of a demolition rather than alongside it. A quote that treats connection and disconnection as one item has compressed two sequences into one.
What the old house left underground
Removing a building leaves its footprint behind. Old footings sit deeper than the surface suggests. A previous slab may be partly broken out and partly buried. Service trenches were dug, filled and compacted to a standard that is not recorded anywhere the new build can consult.
None of that is visible from a cleared block, and none of it is measurable before excavation reaches it. These are latent site conditions: they can only be priced once they are found, and the useful thing a quote can do is state the trigger — what counts as such a condition, and what happens to the price and the programme when one appears.
The temporary works an established Adelaide block needs
An established block needs things a greenfield site has by default. Temporary fencing while the building is down and the site is open. Temporary power and water for the works. Site access on a street with neighbours either side, which can decide what size machine gets in and therefore how long the earthworks take.
They are small items individually, and they are easy to leave out of a scope precisely because nothing about the finished build shows whether they were included.
Levels, drainage and the connection point
Where the sewer connection sits, and at what depth, is a constraint on the new building rather than a detail of it. It participates in setting the finished floor level, which in turn drives how much cut and fill the block needs and whether retaining is required.
On a rebuild the existing connection is already there, which sounds like an advantage and is sometimes a constraint: its position was chosen for a building that is about to stop existing.
What a quote can promise about any of this
Not a final number for the items that have not been investigated yet. What it can do is name them, say how each will be established, and state what happens when the answer arrives — priced in writing, agreed before the work proceeds.
That is a weaker-sounding promise than a single figure and a stronger one to hold, because it is the one that survives contact with the block.
Common Questions
Why can’t a rebuild be quoted as a single figure up front?
Parts of it can. The parts that cannot are the ones that depend on what is found once the existing building is removed — old footings, buried slab, backfilled service trenches, the extent of any asbestos. Those are latent site conditions and they can only be priced once they are found.
What should a demolition scope actually list?
What comes down and what stays: the house, outbuildings, driveway and paving, fencing, retaining, pool, trees. Each is a separate decision that changes both price and programme, and each is worth settling in writing rather than on the day.
How is asbestos handled in a quote?
By stating how it will be established rather than by carrying an assumed figure. Whether it is present, where, and in what condition are answered by inspecting the building. Removal is regulated work whose licensing requirements depend on the type and quantity of material found.
Is service disconnection the same job as connecting the new house?
No. Disconnection is carried out by the relevant utility or network operator to their own process and lead time, before demolition. Connection of the new dwelling is separate work at a separate point in the programme.
What are latent site conditions?
Conditions that exist on the site but cannot be established before the work reaches them — on a rebuild, typically what the previous building left below ground. They are priced once found, in writing, and agreed before the work proceeds.
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