How to Estimate a Project, Step by Step

Welcome

Hello, and welcome. This is Super Structures General Contractors — a national general contractor headquartered in Powhatan, Virginia — here to help you and your clients build something that lasts. We're glad you're with us, and we look forward to connecting with you.

Alright, How to Estimate a Project, Step by Step. Don't let the plain title fool you. Here's the part that actually matters on the job: An estimate is a repeatable procedure — review the documents, take off the quantities, price labor, material, equipment, and subs, add general conditions, overhead and profit, and check it twice — not an inspired guess. Learn it well and your numbers become defensible.

The estimating courses covered pricing theory, markup, and bid strategy. This lesson walks through producing one estimate, start to finish, the way an estimating department actually does it.

Step 1 — Bid/no-bid and document review

Decide to bid. Then read everything: the invitation, Division 00 and 01 (bid form, bonding, insurance, schedule, liquidated damages, allowances, alternates, unit prices), the drawings, the specifications, the geotechnical report, and all addenda. Log questions for the pre-bid meeting and the RFI deadline. Visit the site.

Step 2 — Organize the estimate

Set up the estimate in your standard cost-code structure (CSI-based). Create a bid summary page and detail sheets per division. Decide what's self-performed and what's subcontracted, and send bid invitations to subs and suppliers with the plans and a due date two days before your bid.

Step 3 — Quantity takeoff

Measure every item of self-performed work from the drawings — concrete in cubic yards, formwork in square feet of contact area, rebar in pounds, masonry in square feet and block count, framing in board feet or linear feet, drywall in square feet, doors by count. Use a digital takeoff tool (next lesson) with color-coded layers, record the drawing reference for each quantity, and add waste factors by material. For subcontracted work, take off enough to check the subs' numbers.

Step 4 — Price direct costs

For each item: labor = quantity ÷ production rate × crew cost per hour (burdened); material = quantity × unit price from supplier quotes; equipment = hours × internal or rental rate. Record the source of every price.

Step 5 — Subcontractor and supplier quotes

Receive, level, and clarify sub bids on a scope sheet so each is complete and comparable. Plug your own number for scopes with no responsive bid, flagged as a risk.

Step 6 — General conditions

Price the time-based costs from the schedule: supervision, project engineer, trailer, temporary utilities, fencing, toilets, dumpsters, cleanup, safety, small tools, surveying, testing, temporary protection, and closeout. Then add project-specific costs: permits, bonds, builder's risk and other insurance, and taxes.

Step 7 — Overhead, profit, and contingency

Add home-office overhead at the company's recovery rate, contingency sized to the risks you identified (design completeness, site, market), and profit set by bid strategy and backlog. Check the total against historical cost per square foot and against your gut.

Step 8 — Review and submit

A second estimator reviews: scope coverage against the specs table of contents, math, sub coverage, exclusions and clarifications. Prepare the bid form, alternates, and unit prices. On bid day, finalize late sub numbers on the bid summary and submit on time — a minute late is a no-bid.

Step 9 — After the bid

Record the result and the competitors' numbers. Win or lose, file the estimate; if you win, hand it off to the PM with every assumption written down.

Going Deeper (Intermediate)

Estimate types by stage: order-of-magnitude (cost per square foot), conceptual/parametric (systems-level), and detailed (full takeoff) — accuracy improves from ±30 percent or worse to ±5 percent as the documents and the effort increase. Match the method to the documents you have; don't produce a detailed estimate from schematic drawings and call it precise.

Production rates are your most valuable data. Build them from your own job-cost history (the accounting course explains how) and supplement with published data (next lessons).

Advanced / Pro-Level

Pros run estimate reviews as formal meetings with operations: the super who'll build the job challenges the durations, logistics, and crew sizes. They model risk explicitly — a range for the big unknowns rather than a flat contingency — and they treat escalation on long-duration or volatile materials as a line item. They analyze bid results over time to calibrate markup by owner type, project type, and competitor set.

They also know the specialized worlds: heavy civil estimating is resource- and production-driven with crew and equipment spreads; residential estimating leans on assemblies and allowances; design-build estimating evolves with the design through conceptual estimates and a GMP.

Practice Challenge

You're estimating a 20,000-square-foot tilt-up warehouse. The slab is 6 inches thick. What's the concrete quantity for the slab, and what else do you need before you can price it? (Answer: 20,000 sf × 0.5 ft = 10,000 cubic feet ÷ 27 = 370 cubic yards, plus a waste factor (say 5 percent) ≈ 390 CY; to price it you need the mix and supplier price per yard, the pump or chute method, the finish spec, the crew and its production rate for placing and finishing, reinforcing or mesh quantities, vapor barrier, joints, and curing — each priced as its own line.)

In Practice

An estimator who follows the same nine steps on every bid produces numbers the PM can build to and the company can learn from. An estimator who works from memory produces a different estimate every time.

Common Mistakes to Avoid

• Skipping the full document review, especially Division 01 and the addenda
• Takeoff with no drawing reference, so nobody can check it
• Plugging a sub number without leveling its scope
• General conditions priced as a percentage instead of from the schedule

Takeaway: An estimate is a repeatable procedure — review the documents, take off the quantities, price labor, material, equipment, and subs, add general conditions, overhead and profit, and check it twice — not an inspired guess.

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