How to Compare Contractor Quotes Line by Line
The lowest total is not automatically the lowest price for the same job. A useful comparison normalizes scope, quantities, specifications, allowances, exclusions, and payment terms before looking at the bottom line.
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Create one scope baseline
Write a short project scope before collecting bids. Include dimensions, finished thickness, material or product class, demolition, disposal, base preparation, reinforcement, finish, drainage, access, protection, cleanup, and permit responsibility. Give every bidder the same baseline.
- Attach a dimensioned sketch.
- List must-have specifications separately from preferences.
- Ask bidders to identify substitutions and assumptions.
Normalize what is included
Place each bid in a comparison table with the same rows. One quote may include excavation and disposal while another treats both as change orders. An apparently high bid can become competitive once the scopes match.
- Quantities and dimensions
- Material specification
- Labor and equipment
- Permits, tax, delivery, and disposal
- Warranty and exclusions
Use calculator results as a reasonableness check
A transparent calculator can flag a missing zero, inconsistent thickness, improbable quantity, or hidden allowance. It should prompt a question—not replace a site visit or prove a contractor wrong. Ask the bidder to explain which assumptions differ.
- Compare raw material quantity before price.
- Check whether waste is included twice.
- Ask why low and high quantities differ.
Review risk and payment terms
Clarify schedule, deposit, progress payments, final acceptance, change-order authorization, insurance, licensing where applicable, lien documentation, and who owns leftover material. Keep meaningful decisions in the written contract.
- Verify requirements with local authorities.
- Avoid paying for undefined allowances without a reconciliation method.
- Keep a signed record of scope changes.
Keep planning
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