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
Project Cost Estimator
Roll materials, labor, delivery, waste, and optional markup into a planning total.
CalculateConstructionConcrete Calculator
Work out how much ready-mix concrete a slab, footing, or column needs.
CalculatePaintingPaint Calculator
Estimate how much paint a room needs, based on wall area and coats.
CalculateFlooringFlooring Calculator
Work out how many boxes of flooring to buy for a room, with waste included.
CalculateFrequently 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.