Many contractors use a blank sheet of paper (or worse yet, the back of an envelope), or construction estimating forms, or just a word processor to estimate their jobs. There are also cost books that have thousands of prices in them that are used by many contractors to create estimates for their jobs. If this is you, you're probably losing thousands of dollars every year.
After talking with thousands of contractors over the years it's clear to me that this type of estimating is not the best way of doing it. The challenge is that it's difficult to spot duplications and missing items in your estimate, if it's more that a couple of dozen items.
I believe that the best way to create your estimates, no matter how you do them, it to do them by, what I call, sections. Many people have different names for section, like tasks, classes, categories and so on. Simply put, sections are a way of organizing your estimates in a way that reduces the probability that you'll make an error. Sections are, for example, Site Preparation, Foundations, Framing, Roofing, Electrical, Landscaping, and so on.
The reason this reduces you likelihood of making an error is that every item you add to the estimate is put into a section. Digging and pouring the foundation and items associated with that go into the Foundation Section. All the framing items (labor and materials) go into the Framing section, Roofing items go into the Roofing section, and so on.
So, let's take a look at how this works. As preparing the estimate you put each of the items into the appropriate section. It's also a good idea to total your costs for each section as well.
When you've finished the estimate, you now go back and review each section. Looking at the total for each section gives you an idea if you're in the right ball park to begin with. Then you review each of the items in each section to make sure you don't have any duplicate items. As you're reviewing each section you finally review that everything you need to complete, for example, the foundation is in the Foundation section. You go through each of the sections to confirm that you've got everything you need in the estimate you're going to give to your prospect.
You'll find lists of sections at:
http://www.construction-estimating.com/Sections
which you're free to use and modify to fit your specific needs.
By the way, if you're not at least using a spreadsheet to prepare your estimates, you should do that as well because a spreadsheet will automatically do your calculations eliminating errors in mathematics in your estimates. For the small cost of a spreadsheet and the time to learn how to use it, you can save yourself hours of frustration and errors in your construction estimating.
Christopher Carpenter is the developer of LiteningFast Estimating. LiteningFast is an estimating program that helps you estimate faster, easier and more accurately. It's integrated with QuickBooks to provide job cost.
It was introduced to the market in 1994 and currently has over 3,500 users in the US, Canada, and around the world.
You can find more information at contractor construction estimating. You'll be glad you did.
Information about construction estimating software for contractors is available.
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