Multiple Contractor Bids: How Many to Get, What to Compare & Lowest Bid Risks

Getting multiple contractor bids is one of the most universally recommended homeowner practices — but most homeowners do not know how to use bids effectively, and many make the common mistake of treating the lowest bid as the best value. Understanding how to structure the bid process, what to compare, and how to identify the red flags embedded in a low bid turns a routine step into a genuinely powerful decision-making tool.

How Many Contractor Bids Should You Get?

The standard recommendation is three bids for most home improvement projects. Three bids give you a market reference range, allow you to identify outliers (both too high and too low), and provide enough information to have an intelligent conversation with your preferred contractor about their pricing.

For larger projects ($50,000 or more), consider getting four to five bids. The additional time investment is proportional to the financial stakes. For smaller projects under $5,000, two bids is often sufficient. For emergency repairs where you need someone immediately, one qualified bid may be unavoidable — but you can still verify the contractor's license before authorizing work.

Getting bids from multiple contractors also provides important collateral information: the bid process itself reveals how organized, professional, and responsive a contractor is. A contractor who shows up on time, delivers a detailed written bid within 24-48 hours, and follows up professionally is demonstrating the operational quality you want to see throughout a project.

What Should You Compare Across Contractor Bids?

Comparing bids is only meaningful when the bids cover the same scope. Before soliciting bids, create a written scope of work that specifies exactly what you want done. Each contractor should be bidding on the same materials, the same scope, and the same finish specifications. Without a common scope, bids are not comparable.

Once you have bids on the same scope, compare:

• License and insurance status:Verify each bidding contractor's license before you compare prices. A bid from an unlicensed contractor is not a real bid — it is an invitation to fraud.
• Material specifications: Even with a specified scope, contractors may propose different grades or brands of materials. Confirm each bid uses equivalent materials before comparing totals.
• What is excluded: Read the exclusions section of each bid. A bid that appears $5,000 lower may exclude $8,000 of work through creative exclusion language.
• Timeline: A bid from a contractor who can start in two months versus one who can start in two weeks has different practical value depending on your timeline.
• Payment terms: A contractor requiring 50% upfront versus one requiring 10% upfront is offering materially different terms, not just a different price.
• Warranty: A one-year workmanship warranty versus a five-year warranty is a meaningful difference in long-term value.

What Are the Real Risks of the Lowest Bid?

The lowest bid is the most dangerous bid. Experienced contractors and consumer protection agencies consistently advise against awarding projects solely on price, for good reason:

• Scope omissions:The most common way to submit a low bid is to omit required scope items. Once work begins, these omissions become expensive change orders. A contractor who bids $15,000 when competitors bid $22,000 may be planning to add $10,000 in “unexpected extras.”
• Material substitution: Without specification lock-down in the contract, a low-bidding contractor will use the least expensive available materials. The price difference between a 30-year architectural shingle and a 25-year three-tab shingle can account for thousands of dollars on a roof replacement.
• Unlicensed labor: Using unlicensed day laborers allows a contractor to undercut licensed competitors on labor cost. The legal and safety consequences fall on you.
• Intentional lowball strategy: Some contractors deliberately submit low bids to win jobs, knowing they cannot complete the work at the bid price. Once you are mid-project with your home torn up and substantial money paid, you are in a vulnerable negotiating position.

How Should You Use Bids to Negotiate?

Once you have multiple bids and have verified the credentials of each contractor, use the information to negotiate intelligently. If your preferred contractor is 15% higher than the second bidder, ask them to walk you through why. They may be able to explain specific quality differences that justify the premium, or they may be willing to adjust their pricing to win your business.

Negotiation is most effective on large, single-trade projects. On complex multi-trade projects, price differences often reflect real differences in scope, quality, or approach rather than margin.

Before soliciting any bids, verify each contractor's license at CheckLicensed.com. For $0.99, you confirm that each bidder is legitimately licensed — turning your bid comparison into an apples-to-apples evaluation between qualified professionals rather than a mix of licensed and unlicensed operators.