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The most common mistakes in demolitions and excavations

16 June 2026·7 min

Discover the mistakes that can cause extra costs, delays, accidents or damage to properties.

Organised demolition and excavation site

Many site problems appear before the machines start working. An incomplete assessment can lead to delays and unforeseen costs.

Mistake 1: starting without checking the documents

The permits and approvals needed must be verified before the works begin.

Mistake 2: ignoring the utilities

Pipes and cables can be hidden in the ground or within the structure of the building.

Organised construction site with fenced zone and workers in PPE
An organised site reduces risks from the start.

Mistake 3: choosing the machine only by hourly price

A machine that is too small extends the work. A machine that is too large may not have access or manoeuvring space.

Mistake 4: underestimating the amount of debris

Transport and disposal costs can become significant if the volume is not estimated realistically.

Mistake 5: no protection of neighbouring properties

Fences, facades, paths, networks and nearby structures must be taken into account.

Site trailer with safety plans and a fenced demolition zone
Preparation and signage help prevent accidents.

Mistake 6: storing soil near the edge of the cut

The weight of the material can affect the stability of the edge.

Mistake 7: no plan for bad weather

Rain can quickly turn an excavation into a zone with water, mud and difficult access.

Mistake 8: an incomplete quote

A quote must clearly state what is and what is not included.

Checklist before starting the work

  • Permits verified
  • Utilities identified
  • Access measured
  • Machine selected
  • Zone delimited
  • Neighbours protected
  • Soil storage place set
  • Transport organised
  • Disposal defined
  • Levels and setting out checked
  • Works included in the quote
  • Responsibilities of each party
  • Estimated duration
  • Plan for rain or wet ground

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