Jay Christofferson, a professor in the School of Technology at Brigham Young University have designed a computer spreadsheet is much the same as doing an estimate by hand. According to him most of the company can build their own spreadsheet program for cost estimation but they prefer to buy construction cost estimating software to ease their work. However, there are inexpensive ways to do computer estimating. One way is to use computerized spreadsheets which have the power of programs costing thousands of dollars.
Creating a manual spreadsheet program in excel take longer time to create one but once the once it’s created, all of the estimates that you do afterwards can be done in a fraction of the time.
Find out a fully designed Cost Estimate sheet in detail here: http://www.buildersshow.com/Documents/course_handouts/Estimating%20with%20Microsoft%20Excel.pdf