Common Mistakes for Estimating Building Construction

Common Mistakes in Estimating Building Construction are

  • Misread or misinterpreted specifications, drawing, or any other contract document.
  • Takeoff omissions or overlaps.
  • Missing quotes.
  • Estimating by unit prices.
  • Using the percentage method to establish the cost of certain systems.
  • Prorating indiscriminately.
  • Crumbling under pressure to procure work.
  • Cutting prices to meet or beat someone else’s quote.
  • Underestimating the complexity of a project.
  • Expecting and excessive amount of favourable changes.
  • Overemphasizing volume purchasing.
  • Undertaking a project with incomplete bid documents.


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