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Site Preparation & Bulk Earthworks

Christchurch Foundation Excavation

Precise excavation for foundations, footings and slabs to your engineer's drawings, with levels and depths checked before pour.

03 661 7200

Your site. A clear next step.

Foundation Excavation Christchurch

Christchurch Foundation Excavation means precise excavation for foundations, footings and slabs to your engineer's drawings, with levels and depths checked before pour.

Tell us what you want to achieve, where your site is and when you would like to start. Include any plans, access constraints or measurements that will help us understand the work.

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Recognise your project

Excavate to the foundation design

New buildsRenovations and extensionsGarages and shedsRe-piling projectsSmall commercial sites
  • Foundation trenches or footings need digging to exact engineered depths
  • Ground conditions vary across the footprint and need checking as digging proceeds
  • Existing foundations need partial removal before new footings go in
  • Excavation has to work around existing structures, services or boundaries
  • Groundwater or wet ground is making footings difficult to keep open and dry
  • Inspection hold points need to be met before the pour can proceed

Define the work

Set out the footing and slab preparation

01

Excavation of footings, foundation trenches or slab edges to specified lines and depths

02

Excavation for pile holes or pad footings where called for on the drawings

03

Removal of spoil from excavated areas, carted off-site or stockpiled as agreed

04

Working around known services, boundaries and existing structures

05

Keeping excavations reasonably clear of water where practical during works

06

Coordination around required inspections before backfill or pour

07

Backfill and compaction around foundations once inspections are signed off

From site assessment to completion

Coordinate excavation with the foundation team

  1. 01

    Drawing review

    We work from the structural engineer's or designer's foundation plan, confirming lines, levels and depths before digging starts.

  2. 02

    Setout

    Foundation lines are marked out on the prepared platform using the plan and survey references, checked before any excavation begins.

  3. 03

    Excavation

    Trenches, footings or pile holes are dug to the specified depth, checking ground conditions against what's expected as we go.

  4. 04

    Inspection coordination

    We hold the excavation open and ready for your building surveyor, engineer or council inspector at the required hold points before backfill or pour.

  5. 05

    Backfill

    Once inspections are cleared, we backfill and compact around the foundations as required by the specification.

Illustrative foundation excavation work

Working conditions

Equipment and access for foundation excavation

Excavation depth, trench width and site access all affect machine choice, and confined spaces close to existing structures often need a different approach to open ground. We assess this for each job rather than assuming one machine fits every foundation type.

Plan around the work

Foundation excavation is usually a shorter, more concentrated stage of work, but timing is tight because other trades and inspections are waiting on it. We coordinate closely with your builder so the excavation is ready exactly when needed and doesn't sit open longer than necessary, particularly in wet weather.

Get the detail right

Foundation Excavation: decisions that matter

Foundation levels and depths come from your structural engineer's design — we excavate to that specification rather than setting our own foundation design, and any change in ground conditions found during digging needs to go back to the engineer, not be decided on-site. Getting a footing even slightly out of level or depth can cause problems that are far more costly to fix once concrete is poured, so accuracy at this stage matters more than speed.

Do you design the foundations or just dig them?

We excavate to the lines, levels and depths set out by your structural engineer or designer. Foundation design and any geotechnical assessment of the ground is their role, not ours.

What happens if the ground looks different from what the plans expect?

We stop and raise it with you and your engineer before continuing. Digging on and hoping it's fine isn't something we do — unexpected ground conditions need a qualified assessment.

Can you excavate around an existing house for an extension?

Yes, this is common for renovation and extension projects. We work carefully around the existing structure, footings and any services in the area.

How do you handle groundwater in the trenches?

We manage water in the excavation as practically as possible during the works, but ongoing groundwater issues may need a specific drainage or dewatering solution beyond general excavation.

Will the excavation be ready in time for our inspection?

We coordinate timing with your builder so the excavation is open and accessible for the inspector or engineer at the agreed hold point, and we hold off backfilling until it's signed off.

The next part of your project

Work that connects with foundation excavation

Planning this work

Explore your service area

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Planning foundation excavation?

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