Estimating Construction Starts With the Plans

Estimating Construction Starts With the Plans

Estimating construction from the plans should be done in a systematic method. Like a logical sequence. This method helps you eliminate missing some detail that will later end up costing you money.

Most people start estimating from the basement or foundation. Are the dimensions on the plan measured from the inside of one wall to the inside of the opposite wall? How thick will the concrete footings be? Check the dimensions now to make sure that there's no error in the plans before you start calculating. Check the figures on the plan sheets. Many times you'll find errors that the architect or plan designer made. This is the time to find any errors -- not when your concrete truck arrives with a hot batch. Look carefully at the foundation plan. Examine the placement of supporting columns and piers. Are they to Code? Will more columns be required? Will more rebar or wider footings be required? Everyone makes mistakes and if you're able to find a mistake at this stage it can save you a lot of money.

Once you are satisfied with the basement or foundation plans, move on to the first floor. Are all the windows and doors shown on the plan listed in the schedule? Usually a reference number will relate them to the separate schedule. Are the switches and outlets placed to code and in places that seem to make sense? Is the plumbing in the right place?

After you've looked over the floor plans move to the elevations. These are designed to give you the big picture of the project. You may find section details that will give you detailed information of how the designer wants something built. You'll have to figure your time and materials for all of these.

Finding mistakes in the plans before you begin can save you thousands of dollars, and eliminates time-wasting squabbles between subs, city officials, and owners.

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