The Estimating Process & Takeoffs

An estimate is a prediction of cost — and your whole business rides on getting it close.

The process

1. Review the documents — plans, specs, and scope.
2. Quantity takeoff — measure the quantities of work from the drawings (square feet, linear feet, cubic yards, counts).
3. Price it — apply costs for labor, material, equipment, and subcontractors.
4. Add overhead and profit (next lesson).

Make the takeoff accurate

• Use current pricing and real subcontractor/supplier quotes — not last year's guesses.
• Lean on your historical job-cost data (this is why job costing matters).
• Double-check units and quantities — a takeoff error multiplies through the whole bid.

Going Deeper (Intermediate)

A reliable estimate follows a repeatable process, not gut feel:

1. Review the documents and do a bid/no-bid decision.
2. Takeoff quantities system by system.
3. Price: material (current quotes), labor (hours × burdened rate), equipment, and subs.
4. Add overhead and profit.
5. Review for scope gaps before it goes out.

Advanced / Pro-Level

What makes estimates accurate over time:

• Production rates / labor units — man-hours per unit of work (e.g., 0.015 mh/SF of drywall) built from your historical job-cost data. This is the estimator's gold.
• Assemblies & unit pricing speed up takeoff and reduce misses.
• Accuracy levels: a conceptual/ROM estimate (±25%) vs. a detailed hard-bid estimate (±5%) — know which you're giving.
• Contingency sized to risk (vague scope, new client, tight schedule), not a flat guess.
• Garbage in, garbage out: the closed loop with job costing is what sharpens every future bid.

Practice Challenge

You can hang drywall at 0.015 man-hours/SF. For 10,000 SF at a $33 burdened rate, what's the labor estimate? (Answer: 10,000 × 0.015 = 150 mh; × $33 = $4,950 labor — production rates from real data beat guessing every time.)

In Practice

An estimator eyeballs quantities instead of doing a real takeoff — and the bid comes in 15% short. Measuring from the drawings and using current pricing is what makes an estimate close.

Common Mistakes to Avoid

• Guessing quantities instead of a real takeoff
• Using stale pricing
• Not getting real sub/supplier quotes

Takeaway: A good estimate starts with an accurate takeoff and real, current pricing — guessing is how you bleed.

Educational content — not legal, financial, or accounting advice. Run your numbers with your CPA.