Clearing land to build a house

Who this is for

• Anyone preparing a wooded lot for a house
• Buyers working out what site preparation will cost before committing
• People coordinating clearing, earthwork, and a builder

The short answer

Building imposes requirements the other end uses do not: root mass has to come out from under anything structural, the surface has to be graded to a specification, and the site has to be stabilised while it waits for the next trade.

It is also almost always a multi-trade project. Expect a clearing contractor, someone doing below-grade work and earthwork, and possibly a tree service for large stems near boundaries — coordinated in that order.

What changes the answer

• How much of the lot needs clearing, versus how much you want cleared
• What the builder or designer specified for the finished surface
• Local tree-retention, land-disturbance, and stormwater requirements
• Where the driveway and utility runs go
• How long the gap will be between clearing and construction
• Whether the lot slopes or drains toward anything

The order of operations

Sequence errors on a build site are expensive because each one costs a mobilisation, and some of them destroy work that was already paid for.

• Establish and physically mark the boundary — a licensed surveyor, not a fence line
• Confirm local requirements with the permitting office before anything is cut
• Mark the clearing limit and every tree being kept, in the field
• Call 811 and allow the notice period
• Remove large or awkward stems, if a tree service is involved
• Clear the standing growth in the marked area
• Handle the material — on a lot, usually haul it
• Remove stumps and roots under the footprint, driveway, and utility runs
• Rough grade to the specification
• Install erosion control
• Hand over to the builder

Decide the clearing limit deliberately

The default is to clear the lot, and it is usually the wrong default.

What is needed is the footprint, working room around it, machinery and delivery access, the driveway line, and the utility runs. That is a defined area, and it is normally well short of the whole lot.

The trees you keep are the reason the lot was worth buying, and they are not recoverable. Many jurisdictions also have tree-retention or land-disturbance rules that apply — check before deciding rather than after.

Below-grade work under the structure

This is where clearing for a house differs fundamentally from clearing for anything else.

Root mass left under a slab or a footing decays over years, loses volume, and the ground above it settles unevenly. That is a crack, and it appears long after everyone has left.

Ask whoever is designing the structure what area they need cleared below grade, and to what depth. Extend the same thinking to the driveway and to any trench route. Elsewhere on the lot, leaving stumps is usually fine.

Protecting the trees you are keeping

Trees near construction die from things that never touch the trunk.

Compaction from machinery over the root zone, grade changes that bury or expose roots, and trenching through the root plate are all routine construction activities and all damaging. The damage shows up a season or two later, by which time nobody connects it to the cause.

Agree a protected area around each retained tree, fence it before work starts, and keep machinery, material storage, and spoil out of it.

The gap before the builder arrives

Cleared and graded ground waiting for a build is bare soil, and bare soil moves.

Agree who is responsible for the site between the last trade and the first, what stabilisation is in place, and what happens after a heavy rain. This gap is where most remedial work on build sites originates.

What drives the cost

Common mistakes

• Clearing the whole lot when the working area was what was needed
• Starting before the boundary is located and marked
• Grading before below-grade removal is finished
• Parking machinery and storing spoil over the roots of retained trees
• Leaving the site bare and unstabilised waiting for the builder

Questions to ask a contractor

• What area exactly is being cleared, and can we mark it together on site?
• What area is being cleared below grade, and to what depth?
• What is the finished surface specified to, and who specified it?
• How are the retained trees being protected?
• Who holds the site between your last day and the builder’s first?

What to do next

1. Have the boundary located and marked by a licensed surveyor
2. Confirm tree-retention, land-disturbance, and stormwater requirements locally
3. Get the finished-surface specification from the builder in writing
4. Mark the clearing limit and the retained trees in the field
5. Call 811 and build the notice period into the schedule

Questions people actually ask