How to compare contractor quotes like for like
A practical method for comparing two or three renovation quotes in Canada: build a common baseline, value the extras, flag the unknowns, and pick on normalized price plus warranty.
Updated 2026-09-02
Why totals mislead
Three roofing quotes at $18,400, $22,700 and $31,900 look like a simple ranking. Once you learn the second removes two layers and replaces decking, and the third uses premium shingles and carries a $2,400 project-management fee, the picture changes. The right comparison is the price of the same job from each contractor.
Build the baseline
The baseline is the least inclusive scope that all quotes share: the lowest material grade, the fewest layers, the shortest warranty, no extras. Everything a contractor includes beyond that is valued and taken off their total to get a normalized price.
- List every scope fact from each quote: area, grade, layers, fixtures, glazing, tonnage.
- Pick the minimum of each as the baseline.
- Value each extra with a reference price, not the contractor's own line, which may be inflated.
- Subtract the extras. Keep unexplained lines in the price but flag them.
Compare the normalized prices
After normalizing, the three roofing quotes above become roughly $18,400, $18,600 and $28,000. Two contractors are pricing the same work within $200 of each other. The third is $9,000 higher for the same roof, and the gap is explained by labour and materials, not by the upgrades.
Then weigh what money cannot normalize
Licence and insurance, references on similar jobs, a written workmanship warranty, a realistic schedule, and a change-order process. A normalized price within 10 percent of the lowest with a stronger warranty and better references is usually the better choice.
Do it in one click
Upload two or three quotes to QuoteSaver and it builds the baseline, values the extras against a cited Canadian reference model, flags unmatched lines, and shows the normalized price for each contractor.
Frequently asked questions
- What if the quotes are for different materials?
- Normalize to the lowest grade. Value the upgrade at reference cost and subtract it from the higher quote. If you actually want the upgrade, compare what each contractor charges for it separately.
- Should warranty length change the comparison?
- Yes. A longer workmanship warranty has value, roughly 0.4 percent of the job per extra year, and some contractors price it as a line. Treat it as an extra.
- What is a normalized price?
- The quote total with extras beyond the shared baseline scope valued and removed, so every contractor is priced for the same work.