Key Takeaways
Start With a Clear Scope of Work
Before you contact a single contractor, you need to know — in writing — exactly what you're asking them to do. A scope of work is a document that describes your project in specific terms: which rooms are involved, what materials you prefer, what work is excluded, and what the finished result should look like. The more detail you provide, the more comparable your bids will be.
Without a defined scope, each contractor will bid on a slightly different project, making comparisons nearly meaningless. If you're planning a larger renovation, our kitchen remodel planning guide walks through how to sequence decisions before work begins. For a broader pre-project checklist, see Before You Start Any Renovation.
Write Your Scope Before Searching
Even a one-page bulleted description of your project — dimensions, preferred materials, what you want excluded — gives contractors enough to provide meaningful bids. Investing 30 minutes here can save weeks of back-and-forth and make bid comparisons far more straightforward.
Sourcing and Vetting Contractors
Personal referrals from neighbors, family, or trusted local trade associations are generally the most reliable starting point. Once you have names, verify each candidate's credentials before inviting them to bid.
Verify licenses and insurance before inviting anyone to bid.
An unlicensed contractor may not meet local code requirements, and an uninsured one could expose you to liability if a worker is injured on your property. Confirming credentials upfront eliminates significant legal and financial risk.
Check references from recent, comparable projects.
References reveal how a contractor actually performs — not just how they present themselves. Recent references are more relevant because they reflect current team composition and workmanship standards.
Require all change orders to be signed in writing before work proceeds.
Verbal agreements about additions or modifications are a leading cause of billing disputes. A written change order establishes the agreed cost and scope before any extra work begins.
Tie every payment to a defined project milestone.
Milestone-based payments give you leverage if work quality falls short and ensure the contractor remains incentivized to keep the project on schedule.
Conduct a formal walkthrough before releasing final payment.
A final walkthrough is your opportunity to identify incomplete or unsatisfactory work while the contractor is still financially motivated to address it.
Check that each contractor holds a valid state license for the type of work involved (requirements vary by state and trade), carries general liability insurance, and maintains workers' compensation coverage. Ask for certificates of insurance directly — a reputable contractor will provide them without hesitation.
Collecting and Comparing Bids
Request written bids from at least three contractors, all working from the same scope of work. A bid should itemize labor, materials, subcontractor costs, and any allowances for items not yet selected. If one bid is dramatically lower than the others, ask the contractor to walk you through the line items — sometimes a low number reflects missing scope rather than genuine efficiency.
3+
Bids recommended before hiring
Industry guidance from consumer protection agencies consistently recommends collecting at least three competitive bids for any significant home project.
10–30%
Typical maximum upfront deposit
Many state contractor licensing boards and consumer advocacy organizations flag upfront deposits exceeding 30% as a potential warning sign.
When reviewing bids, consider the full picture: timeline estimates, communication style during the bidding process, and how thoroughly each contractor answered your questions. Responsiveness before the contract is often a preview of how they'll perform during the job.
When Only One or Two Bids Are Realistic
In some rural areas or for highly specialized trades, getting three bids may not be practical. In those cases, research typical cost ranges for your project type through sources like regional homebuilder associations or published cost guides. This gives you a benchmark even when competitive bidding isn't possible.
Understanding and Signing the Contract
A solid contract protects both parties. It should include the full scope of work, a detailed payment schedule tied to milestones (not arbitrary dates), the start and estimated completion date, a list of materials and specifications, and a clear process for handling change orders — written amendments for any work added or removed after signing.
Avoid paying more than 10–30% as a deposit. Final payment should not be released until the work is complete, inspected, and you're satisfied. Some projects require permits and inspections under local building codes; confirm with your contractor which permits they will pull and ensure all required inspections are completed before work is closed out.
Hiring a contractor shares some structural similarities with other major purchasing decisions — like the research-to-commitment arc described in this complete buyer's roadmap. In both cases, due diligence before you sign prevents the most common regrets.