Hiring a Contractor: Red Flags, Contracts, and How to Protect Yourself

Americans spend over $500 billion annually on home improvement and repair. The contracting industry ranges from highly skilled, licensed professionals to unlicensed operators who take deposits and disappear. The difference between a great renovation and a legal nightmare often comes down to what you do before the work starts. Here is how to hire right, structure the deal, and protect yourself when things go wrong.

Step 1: Verify the License

Licensing requirements vary by state and by trade. Most states require contractors to be licensed for work above a certain dollar threshold (commonly $500 to $1,000). Some trades — electrical, plumbing, HVAC — require specific trade licenses in nearly every state.

How to verify: Every state has an online contractor license lookup. Search "[your state] contractor license verification" and enter the contractor's name or license number. Verify that the license is active (not expired, suspended, or revoked), covers the type of work you need, and matches the name of the person or company you are hiring.

Why this matters: If an unlicensed contractor does bad work, you have limited legal recourse. Many states do not allow unlicensed contractors to sue for payment, which means they are more likely to cut corners since they are already operating outside the system. Insurance claims related to unlicensed work may also be denied.

Step 2: Verify Insurance

A contractor should carry two types of insurance at minimum:

• General liability (GL) insurance: Covers property damage the contractor causes to your home during the work. Minimums vary, but $1 million per occurrence is standard.
• Workers' compensation (WC) insurance: Covers injuries to the contractor's employees on your property. If a worker falls off a ladder and the contractor does not have WC, the worker (or their attorney) may come after your homeowner's insurance.

How to verify: Ask the contractor for a Certificate of Insurance (COI) and call the insurance company directly to confirm the policy is active. Certificates can be forged or outdated. A legitimate contractor will have no problem providing this.

If they say they are a sole proprietor with no employees: They still need general liability. Workers' comp may not be required for sole proprietors in some states, but if they hire subcontractors, those subcontractors need their own WC coverage. Ask who will be doing the work.

Step 3: The Three-Bid Rule

Get at least three written bids for any project over $1,000. This serves two purposes: it establishes a market price range for the work, and it reveals outliers. If two bids come in at $12,000 and one comes in at $5,000, the low bid is not a bargain — it is a warning sign (cutting corners, missing scope items, or a bait-and-switch setup for change orders).

What a proper bid should include:

• Detailed scope of work (not just "remodel bathroom")
• Materials specified by brand and grade
• Labor costs broken out separately
• Timeline with start and estimated completion dates
• Who pulls permits (should be the contractor, not you)
• Payment schedule
• Warranty terms

A verbal quote is not a bid. If a contractor will not put it in writing, move on.

Step 4: Structure the Payment Schedule

Payment structure is your primary leverage. Once you have paid in full, you have no leverage if the work is incomplete or defective. Here is the standard payment structure for most residential projects:

• Deposit: 10% to 30% at contract signing. This covers the contractor's material procurement costs. Never pay more than 30% upfront. Some states cap the allowable deposit (in California, it is 10% or $1,000, whichever is less).
• Progress payments: tied to milestones. For example: 25% at demolition complete, 25% at rough-in complete (framing, plumbing, electrical), 25% at finish work complete.
• Final payment: 10% to 15% upon completion and inspection. Do not release the final payment until the work is done to your satisfaction, the final inspection has passed (if permits were pulled), and you have received lien waivers from all subcontractors and material suppliers.

Red flag: A contractor who demands 50% or more upfront is either undercapitalized (using your money to finish another job) or planning to disappear. Walk away.

Step 5: Get a Written Contract

Every project over $500 should have a written contract. Many states require it by law. The contract should include:

• Full legal name and license number of the contractor
• Complete scope of work with specifications
• Total price and payment schedule
• Start date and estimated completion date
• Change order process (how changes to the scope are priced and approved — always in writing)
• Warranty terms (1 year on workmanship is standard, materials carry manufacturer warranties)
• Dispute resolution clause (mediation before litigation saves everyone money)
• Cancellation/termination terms for both parties
• Insurance and license information
• Permit responsibilities

Never sign a contract with blanks. Every field should be filled in. "TBD" on price or scope is an invitation for a surprise.

Step 6: Lien Waivers

This is the protection most homeowners forget. If your contractor does not pay their subcontractors or material suppliers, those unpaid parties can place a mechanic's lien on your property — even though you paid the general contractor in full. In some states, you could be forced to pay twice.

How to protect yourself: Require lien waivers from the general contractor, every subcontractor, and every material supplier with each progress payment. A lien waiver is a signed document confirming that the party has been paid for the work completed to date and waives their right to file a lien for that amount.

There are two types: conditional (waiver is contingent on the check clearing) and unconditional (waiver is effective immediately). Conditional waivers with progress payments, and unconditional waivers with the final payment, is the standard approach.

Step 7: Permits

Any work that involves structural changes, electrical, plumbing, HVAC, or changes to the building envelope (windows, roofing, siding) typically requires a building permit. The contractor should pull the permit, not you. When a contractor asks you to pull the permit as a "homeowner-builder," they are usually trying to avoid scrutiny because they are unlicensed or their license has issues.

Unpermitted work creates problems when you sell the home. Buyers' inspectors and appraisers look for permits. Unpermitted additions or modifications can reduce your home's value, complicate the sale, or force you to tear out and redo the work.

Red Flags: When to Walk Away

• Demands cash only and will not provide receipts
• No written contract or refuses to detail the scope of work
• Cannot provide license number or insurance certificate
• Requests more than 30% deposit upfront
• Shows up unsolicited after a storm offering emergency repairs at a "discount" (storm chasers)
• Pressures you to make a decision immediately ("I have another job lined up and can only hold this price today")
• Has no physical office or business address
• Multiple complaints on the BBB or state licensing board
• Suggests skipping the permit to "save time and money"
• Will not provide references from recent projects or let you see completed work

If Something Goes Wrong

• Document everything: Photos, videos, written communications, receipts, and the contract. Do not rely on verbal conversations.
• Put complaints in writing: Send a written notice (email with read receipt or certified mail) describing the deficiency and requesting a specific remedy within a specific timeframe.
• File a complaint with your state contractor licensing board. This can trigger an investigation and may result in disciplinary action against the contractor.
• Mediation before litigation: If your contract includes a mediation clause, use it. Mediation costs $500 to $2,000 and resolves disputes faster than court.
• Small claims court: For disputes under your state's threshold (typically $5,000 to $15,000), small claims court is fast, cheap, and does not require a lawyer.

Bottom Line

The vast majority of contractors are honest professionals. But the minority who are not can cause catastrophic financial damage. The protections outlined above — license verification, insurance confirmation, written contracts, structured payments, and lien waivers — cost you nothing except time. They are the difference between a successful project and a $30,000 lesson. Do the homework before the hammer swings.