How to Create a Professional Estimate: Steps and Guidelines for Construction Projects

Creating Accurate Estimates for Construction Projects: Key Steps and Best Practices

Learn the steps to create a professional estimate, from reviewing all the documents to developing the project durations. The article delves into the details of preparing a quantity takeoff, grouping pricing, and providing unit costs, among others.

Key Insights

  • This process involves a comprehensive review of all relevant documents including plans, specifications, addendums, bid requirements, or supplemental instructions such as a bid form or an RFP.
  • It requires preparing a quantity takeoff, which includes details of all items and assemblies needed to construct the project, and providing unit costs for all these items categorized under labor, material, equipment, and subcontractors.
  • Estimating skills also necessitate the ability to develop project durations, provide added costs, and handle overhead markups to generate the total cost of the project.

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Now we'll cover the steps required to create a professional estimate. First, we start by reviewing all the documents including plans, specifications, addendums, bid requirements, or supplemental instructions such as a bid form or an RFP.

This is what we talked about in the blueprint reading class. Preparing a quantity takeoff or referred to as QTO, including quantities and units of measure which we'll see as UOM in some of our documentation, of all the items and assemblies required to construct the project. Organize all quantities in accordance with master format organizational structure.

Group all items as required to support the estimate's WBS codes or work breakdown structures. Utilize item and assembly naming conventions suitable for use in the estimate. Once the quantity takeoff is completed, we'll now use that information to prepare an estimate.

The estimate requires providing unit costs for all quantity takeoff items. We'll be using separate cost categories for labor, material, equipment, and subcontractors. We'll be grouping pricing as required to meet the WBS needs for cost analysis or bid forms.

What that represents is you might have a phase one or phase two. You might have a first floor or second floor. Those could be considered work breakdown structures.

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You'll also have to develop the project durations or schedule for the general conditions. General conditions meaning the actual cost that it takes for the company that you're working for to be on site or to manage the process for a duration of time. Provide added costs, overhead markups to generate the total estimate cost.

We'll provide any required alternates outlined in the bid documents. We'll check for errors and we'll also complete the proposed bid form or estimate cover sheet. So, in general, estimating skills require the ability to read plans, read specifications, provide a quantity takeoff of what's in the plans and specifications, and then to generate an estimate with unit costs that we may retain from multiple different areas, whether it be RS means data or the home supply store.

photo of Ed Wenz

Ed Wenz

Construction Estimating Instructor

Ed started Wenz Consulting after 35 years as a professional estimator. He continues to work on various projects while also dedicating time to teaching and training through Wenz Consulting and VDCI. Ed has over 10 years of experience in Sage Estimating Development and Digital Takeoff Systems and has an extensive background in Construction Software and Communications Technology. Ed enjoys spending his free time with his wife and grandchildren in San Diego.

  • Sage Estimating Certified Instructor
  • Construction Cost Estimating
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