Why the Base Price Leaves Out the Ground
A builder can't price a block they haven't tested. So most house-and-land base prices assume a standard site, with limited fall, moderate clay, no rock and no fill, and add site costs once the soil report and level survey come back. Nobody is being sneaky. It's just the point where the real block replaces the brochure block.
Where owners get caught is reading site costs as one number. It isn't. It's a list, and only some of it is earthworks.
The Lines That Are Earthworks
- Site cut or cut and fill. More fall across the block means more to cut, and sometimes fill to place.
- Spoil removal. Cartage and tip fees for whatever leaves the block.
- Rock. A rock allowance or provisional sum, because nobody knows exactly how much is there until the cut is open.
- Fill removal. Digging out uncontrolled fill to natural ground when the engineer asks for it.
- Topsoil strip and tree roots. Sometimes a separate line, sometimes buried in the cut.
- Deep service trenches. When the sewer or stormwater point is deep or a long way from the house.
The Lines That Aren't
Several of the biggest site-cost lines in Melton have nothing to do with the excavator:
- Slab upgrades for H1, H2, E or P class sites: deeper beams, more steel, piers
- Termite protection
- Temporary fencing, site toilet and skip bins
- Bushfire (BAL) construction on some lots at the edge of town
- Service connections from the property boundary
A cheaper site cut won't move these. Knowing which is which stops you chasing the wrong line. Our soil report guide explains why the slab lines move with the soil class.
Where Earthworks Money Hides
The earthworks lines in a builder's site costs are often one line each: a site cut figure and a rock allowance. That leaves a lot unsaid. These questions open them up:
- What volume is the cut priced on, and is it in-situ (bank) or loose?
- How many truck loads does the spoil allowance cover, and what's the rate per extra load?
- What's the rock rate once the allowance runs out, per hour for the breaker and per load for disposal?
- If fill has to come out, how deep does the allowance go?
- Does the price include the topsoil strip and the overcut around the slab?
Our truckloads guide shows how to turn a cut volume into a load count, so you can check a spoil allowance yourself.
Site costs aren't one number. They're a list, and only some of it is earthworks.
Can You Use Your Own Earthmover?
Sometimes. Some builders let the owner engage the earthworks contractor and take over a prepared pad. Many volume builders don't, or only under strict conditions. That's in their contract, so ask before you sign, not after.
Even if you can't swap, an independent quote from the same cut sheet is useful. If our price for the cut and spoil is close to the builder's allowance, good. If it's far off, you know which line to ask about. See the earthmoving quote checklist for how to compare two prices fairly.
Frequently Asked Questions
Why did my site costs go up after the soil test?
Because the base price assumed a standard site. The soil report and level survey show the real slab class, fall and rock risk, and the builder prices the difference. Some of those lines are earthworks; many are slab.
Is a provisional sum for rock normal?
Yes, because nobody knows exactly how much rock is there until the cut is open. Ask what rate applies once the allowance is used up and how the extra will be measured.
Can I get a separate quote for my site cut?
Yes. We quote from the cut sheet and soil report. Whether your builder lets you use an outside earthmover depends on their contract, so ask before you sign.