Construction Problem Center

Why Construction Projects Go Over Budget

Cost overruns are rarely caused by one big mistake — they're usually the sum of small, unmanaged decisions made without reference to a budget.

Common causes

  • Starting construction without a proper BQ or detailed estimate
  • Frequent design changes once construction has started
  • No contingency allowance built into the original budget
  • Material price fluctuations not accounted for
  • Poor procurement — buying materials piecemeal at higher prices
  • No one tracking actual spend against the budget as work progresses

When to get a professional assessment

  • No BQ or budget was prepared before construction began
  • You can't say how much has been spent so far versus planned
  • Frequent 'extra' costs your contractor didn't originally quote

This information is general guidance for planning purposes and is not a substitute for an in-person professional assessment. Every building and site is different — a TEKEEY engineer can confirm the actual cause and recommend next steps.

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