A bid comparison is useful only when each contractor is pricing substantially the same work. Instead of starting with the bottom line, make scope differences visible and ask for written clarification before choosing.
Create one shared scope
Give every bidder the same project description, site information, product preferences, and known constraints. For replacement work, specify what is being removed, what finish condition you expect, and which rooms or components are included.
If you are uncertain about the right solution, ask contractors to state their proposed approach and assumptions separately. Do not force different approaches into a false comparison; identify which scope decisions still need to be made.
- Use an itemized checklist: materials, labor, disposal, permits, cleanup, and repairs.
- Ask bidders to identify allowances, exclusions, and owner-provided items.
Compare risk and accountability
Read the schedule, payment milestones, warranty language, and procedure for concealed conditions alongside the scope. A proposal that omits an important task may shift risk to you even if the initial total looks straightforward.
Check whether subcontractors, utility coordination, inspections, and final commissioning are included. Ask who your point of contact is and what documents you receive when the work is complete.
Resolve differences before signing
Send each contractor the same written questions about any unclear line item. Request revised proposals when answers change the scope so that your final comparison uses the actual commitments, not verbal assurances.
Keep the signed scope, product schedule, and approved changes together. If a contractor will not put key promises or the complete work description in writing, treat that as a decision signal rather than filling in the blanks yourself.
Sources & further reading
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