The steps in construction estimating
A detailed construction estimate follows the same sequence whatever the trade: understand the job, measure it, price it, check it and present it. Skipping a step is how most bad numbers happen. Here's the sequence, with a worked labor-burden example and the timeline most two-week bids run on.
- Intake and review
- Detailed takeoff
- Pricing
- Review and proposal
The steps, from invitation to proposal
- Intake and bid/no-bid. Log the opportunity, due date, question deadline, pre-bid meeting and bonding requirement. Decide whether to pursue based on fit, capacity, competition and risk.
- Document review. Drawing index, specifications, addenda, bid form, instructions to bidders, contract form. Confirm you have every sheet and revision listed in the index.
- Scope sheet. List every specification section and bid-form item in your trade, each marked included, excluded or by others. Most specifications follow CSI MasterFormat. The 2026 edition is current, but many project manuals still use older editions, so check section numbers against the manual you have.
- Detailed takeoff. Quantities by item, area and system, each tied to the sheet and detail it came from.
- Quotes. Send requests to suppliers and lower-tier subs early, with the scope and the documents. Level the quotes when they come in.
- Labor. Hours from productivity rates times quantities, priced at burdened rates.
- Equipment and indirects. Lifts, cranes, tools, supervision, mobilization, temporary facilities, permits, cleanup, general conditions.
- Overhead, contingency and profit. Explicit and consistent, with contingency tied to named risks.
- Review. Ratio checks against past jobs, a second reviewer on the largest lines, and a scope sheet check.
- Proposal. Basis documents, inclusions, exclusions, qualifications, alternates, unit prices and price.
Detailed vs. preliminary estimates
A detailed estimate prices every item from a full takeoff on complete documents. A preliminary or conceptual estimate uses ratios, assemblies and allowances for early budgets.
AACE International classifies estimates from Class 5 (least defined) to Class 1 (most defined) by how mature the project definition is. AACE stresses that class is set by definition maturity, not by a target accuracy, and that its published accuracy ranges are indicative "range-of-ranges." Building projects use the RP 56R-08 version of the system. The process above describes a detailed estimate; preliminary estimates compress steps 4 to 6 into ratios and assumptions.
Components of the estimate
| Component | Built from |
|---|---|
| Direct material | Quantities × unit prices + waste + freight + sales tax where it applies |
| Direct labor | Hours × burdened rates |
| Equipment | Owned and rented, fuel, delivery, operators if needed |
| Subcontracts | Leveled lower-tier quotes |
| Indirects | Supervision, mobilization, temporary items, permits, cleanup |
| Overhead | Company costs allocated to the job |
| Contingency | Named risks |
| Profit | Markup on cost |
| Bonds and insurance | Per the bond rate and policy terms |
Quantities drive almost every line. Errors in step 4 flow through all of them.
Worked example: a burdened labor rate (illustrative)
A journeyman at a $40.00/hr base wage, open shop:
| Item | Basis | $/hr |
|---|---|---|
| Base wage | 40.00 | |
| Social Security + Medicare (employer) | 7.65% of wages | 3.06 |
| Federal unemployment (FUTA) | 0.6% net rate on first $7,000/yr, about $42/yr ÷ 2,000 hr | 0.02 |
| State unemployment | Varies by state and experience; assume 3% on a $12,000 base, ÷ 2,000 hr | 0.18 |
| Workers' compensation | Varies by class code, state and your EMR; assume $6 per $100 of payroll | 2.40 |
| General liability (payroll-rated portion) | Assume 1.5% | 0.60 |
| Benefits (health, retirement, PTO) | Company-specific; assume | 8.50 |
| Burdened rate | 54.76 |
The federal payroll tax rates come from the IRS. Every other line is an assumption you replace with your own. Workers' comp alone can range from a few dollars to well over $20 per $100 of payroll depending on trade and state. Union jobs use the fringe rates in the collective bargaining agreement instead of the benefits line. On prevailing-wage work, use the wage determination for the county and craft.
A typical two-week bid
| Days before due | Activity |
|---|---|
| 14–12 | Review documents, bid/no-bid, scope sheet, send quote requests |
| 11–6 | Takeoff; submit questions before the deadline in the instructions to bidders |
| 7–3 | Pricing, labor, quote follow-up |
| 3–2 | Addenda review, leveling quotes, exclusions |
| 1 | Review meeting, recap, proposal |
| 0 | Final quotes, number, submission |
Under AIA A701-2018, bidder questions are due at least 7 days before the bid date and addenda go out no later than 4 days before, unless the bidding documents say otherwise. Plan the takeoff so your questions make that window.
Who does what
| Step | Typical owner |
|---|---|
| Bid/no-bid | Chief estimator or manager |
| Scope sheet and quote requests | Estimator, coordinator |
| Takeoff | Estimator or takeoff specialist |
| Pricing and labor | Estimator |
| Review | Senior estimator or manager |
| Proposal and submission | Estimator, coordinator |
On small teams one person does every step. The review should still be done by someone else whenever possible.
Where the process breaks, and how to prevent it
- Late or incomplete documents. Check the drawing index on day one and ask for missing sheets right away.
- Last-hour quotes. Set internal quote deadlines two days before the bid, and carry a plug number with a note when a quote is missing.
- Late addenda. Review each addendum against the takeoff by sheet, and reprice only what moved.
- Unwritten assumptions. Draft exclusions and qualifications during takeoff, when you notice the gaps.
Document it so it can be defended
Keep the basis with the estimate: drawing list and revisions, takeoff with sources, quotes, productivity assumptions, RFIs and qualifications. It speeds review, supports negotiation and makes the handoff easier.
After award
The estimate becomes the project budget. A good handoff covers the scope sheet, assumptions, quotes and their validity, labor hours by cost code, exclusions and open RFIs. After each bid, note what slowed it down and fix one thing next time. Save the final takeoff, quotes and proposal together for change pricing and future bids.
Where RenderDraw fits
RenderDraw supports step 4. The AI takeoff reads drawings, schedules and specs, proposes quantities with the source sheet attached, and holds uncertain items for estimator review before anything is priced.
Spend your hours on scope and price, not re-counting.
RenderDraw's AI takeoff reads drawings, schedules and specs, proposes quantities with the source sheet attached, and holds uncertain items for estimator review before anything is priced.
- Source on every quantity. Each count, length and area keeps its source sheet and location.
- Lowest confidence first. The review queue puts the items most likely to be wrong at the top.
- Addenda through the same review. Send the changed sheets through takeoff and estimator review, then reprice what moved.
- Approval before pricing. Nothing moves on to pricing until an estimator accepts it.
Send one plan set
Pick a real job with an addendum. Sample files stay private while RenderDraw assesses the request, and there is no obligation to proceed.
RenderDraw does not publish accuracy percentages or time-saved claims. Test it on your own plan set.
Questions estimators ask.
What are the steps in construction estimating?
Intake and bid/no-bid, document review, scope sheet, detailed takeoff, supplier and subcontractor quotes, labor, equipment, indirects, overhead, contingency and profit, then review and the proposal.
What is a detailed construction estimate?
An estimate that prices every item from a full takeoff on complete or near-complete documents. AACE International's classification system calls the most defined estimates Class 2 and Class 1; early budgets based on ratios are Class 5 or 4.
What makes up the cost estimate of a project?
Direct material, direct labor, equipment, subcontracts, indirect or general conditions costs, overhead, contingency, profit, and bonds, insurance and taxes where they apply.
What is labor burden?
The cost of an hour of labor beyond the base wage, including employer payroll taxes, workers' compensation, liability insurance, and benefits or union fringes. Employer Social Security and Medicare alone are 7.65% of wages up to the Social Security wage base.
Why is the takeoff so important?
Every cost line multiplies a quantity, so takeoff errors spread through material, labor, equipment and markup.
How long does it take to prepare an estimate?
It depends on scope and documents. Small bids can take hours; large commercial bids can take one to three weeks of estimator time, with takeoff usually the longest step.
What is a bid recap?
The summary sheet that totals all cost categories, adds markup, bonds and taxes, and produces the final price.
Where does RenderDraw fit?
The takeoff step. RenderDraw's AI proposes quantities with the source sheet on every row and holds uncertain items for estimator review. Get a free sample takeoff at renderdraw.com/trial.
Start the detailed estimate with quantities you can trust.
Send a set. RenderDraw proposes quantities with sources for review.
- Upload the plans, specs and schedules, plus an addendum if you have one.
- RenderDraw reviews the set and the scope you want tested.
- We follow up with extracted quantities, flagged items and next steps.
Related tools and guides
Keep reading on renderdraw.com
Sources and further reading
- AACE International: Guide to Cost Estimate Classification Systems (PGD 01)
- CSI MasterFormat 2026
- IRS: Topic no. 751, Social Security and Medicare withholding rates
- IRS: Topic no. 759, Form 940, Federal Unemployment (FUTA) Tax
- AIA Contract Documents: Instructions for A701-2018, Instructions to Bidders
Figures marked as rules of thumb are starting points, not standards. Check the current edition of any code or standard your project specifies, and use your own historical production rates where you have them. Sources checked 2026-11-01.