Earthworks in North Toowoomba

On the older cottages north of the CBD, the excavator usually has to come down a side passage beside the house. From there it digs trenches for footings, cuts into a slope for a new room, or opens up the yard for drainage and a retaining wall.

The size of the machine matters more than the size of the job. A small excavator can pass through a narrow side gate or down a thin driveway, and it can work close to a fence or an existing wall. A larger one digs faster but needs room to swing and a clear path in.

A qualified operator looks at the gap, the slope and what is overhead, then picks the machine. The contractor also checks ground conditions and how underground services will be located before anyone digs.

Often it can, but the gate and the path to the work area decide it. Contractors measure the narrowest point first, usually a side passage, a gate post or a carport beside the house. The contractor confirms what fits when they see the site.

Where a full-size machine will not fit, there are choices. A compact excavator can squeeze through a much smaller opening. A skid steer (a small loader that turns on the spot) or a hand crew can handle the last stretch. In some cases a fence panel comes off for a day so the machine can pass, then goes back on.

Overhead lines, tree limbs and steps also count. On narrow lots with neighbours close on both sides, the operator plans where the machine stands and where the trucks load. A clear plan keeps the dig tidy and keeps the neighbours on side.

On a renovation dig, the dirt has to go somewhere, and on a small lot that usually means trucks loading as the excavator digs. There is rarely room to stack it without leaving a mound beside the new slab.

Some of the soil can stay if it is clean and the pad needs fill. Anything surplus is carted off and tipped. Your price should say whether truck loads and tipping are included, because disposal is a real part of the cost on a small lot.

Rock or old buried pipework changes the digging method, so each gets its own line in a written price.

A house pad is the level, compacted surface a slab sits on. On a sloping North Toowoomba block, the pad usually means cutting the high side and filling the low side. Compaction means the fill is pressed down in layers, and that is what stops the slab settling after the concrete goes on.

Rubble removal comes first on many older yards. Old paving, old slabs, garden beds and old fencing have to go before anyone can cut or fill, and a skid steer is often the machine that carts them out through the side access.

On the sloping inner-north blocks, a shed pad at the back of the yard often means cutting into the rise and carting the cut out through that same narrow side access. That carting is the same line item as the spoil.

Grading and site preparation shape the ground so water runs away from the building. On a tight block, runoff from the higher yard next door can end up against your wall, so the fall at the pad stage matters.