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How to Compare Contractor Quotes Side by Side

Updated 2026-08-23

Three quotes for the “same” job can look wildly different until you line up scope. Your own material estimates won’t replace a trade quote, but they make vague lump sums easier to question.

Put every quote in the same columns

Ask for materials, labour, equipment, waste removal, and allowances as separate lines where possible. A single total hides whether you are comparing different thicknesses, grades, or inclusions.

Note what is excluded: permits, landscaping repair, painting, haul-away, and after-hours work often sit outside the headline number.

Sanity-check materials

Run the relevant calculator (concrete, paint, flooring, and so on) with the same dimensions the quote assumes. If the material line is far from your estimate, ask whether thickness, waste, or product grade differs.

Use the Cost Estimator to assemble your planning total beside each quote — labelled as an estimate, not a counter-offer.

Schedule and payment

Compare start windows, weather contingencies, and payment schedules. A cheaper quote with a large upfront deposit and vague completion language can be riskier than a mid-priced clear scope.

Written change-order rules matter. Verbal ‘we will sort it later’ is where budgets break.

References and insurance

Confirm insurance and, where relevant, licensing. Photos of similar completed work beat generic marketing pages.

For structural or roofing work, the lowest number is not a quality signal by itself.

Use a calculator for this

Frequently asked questions

Is the cheapest quote always worse?

Not always — but if it is far below the others, find what was left out before you celebrate. Missing sub-base, thinner slabs, or excluded haul-away are common gaps.

Should I share my calculator results with the contractor?

You can. Frame them as planning figures you want to reconcile, not as an accusation. Good trades will explain differences calmly.