Why Vetting a Contractor Deserves Real Effort

Hiring a contractor is one of the most consequential financial decisions a homeowner makes. Whether you're replacing a roof, remodeling a kitchen, or adding a bathroom, the person you choose determines not just the quality of the finished work — but also your legal exposure, your timeline, and potentially your home's resale value.

Problems arising from unvetted contractors are among the most common and costly home-related disputes homeowners face. Unpermitted work, vanishing deposits, structural shortcuts, and mismatched expectations are all preventable — if you do the groundwork before a single nail is driven.

If you're still deciding whether a project even needs a professional, our guide on which maintenance tasks require a pro is a useful starting point. And for newer homeowners still finding their footing, this introduction to home improvement covers the planning basics you'll want in place first.

Use the checklist below as your step-by-step verification process — work through it before committing to any contractor, regardless of project size.

Required

State Contractor Licensing Board Website

Used to verify that a contractor's license is current, in good standing, and covers the type of work being done in your state.

Required

Certificate of Insurance Request Form

A document you request from the contractor's insurer confirming coverage levels and that you're listed as an additional insured.

Required

State Business Registration Database

Used to confirm the contractor's business is legally registered and operating under a verifiable name in your state.

Required

Project Folder (Physical or Digital)

Centralizes your contract, permits, payment receipts, change orders, and warranty documents throughout the project lifecycle.

Optional

Dated Photograph Log

Documents the pre-project condition of your property and tracks visible progress at key milestones — useful for disputes.

Required

Local Building Department Contact

Used to confirm which permits are required for your project, what inspections are needed, and whether the contractor is authorized to pull permits.

The Contractor Vetting Checklist

Work through each group in order. Some steps (like license verification) take only minutes online; others — such as checking references — may take a day or two. Build that time into your planning so it doesn't create pressure to skip steps.

Credentials & Legal Standing

Verify the contractor holds a current, valid license for your state and the specific type of work being performed — check directly through your state licensing board's website. Must
Confirm the contractor carries general liability insurance and ask for a certificate of insurance naming you as an additional insured for the project duration. Must
Ask for proof of workers' compensation coverage for any employees or subcontractors — without it, you could be liable for on-site injuries. Must
Search the contractor's name and company through your state attorney general's office or local Better Business Bureau for any complaints or disciplinary actions. Should

Business Identity & Track Record

Confirm the contractor has a verifiable physical business address — not just a P.O. box or an informal cell number. Must
Ask how long the business has been operating under its current name; verify that history through your state's business registration database. Should
Request references from at least three recent projects of similar scope and type, and follow up with each one by phone or in person. Must
Search the contractor's business name online, including reviews on multiple platforms, noting whether the contractor responds professionally to criticism. Should

Bids, Scope & Permits

Collect written, itemized bids from at least three contractors covering the same project scope so comparisons are meaningful. Must
Confirm upfront who is responsible for pulling required permits — in most jurisdictions this should be the licensed contractor, not the homeowner. Must
Ask specifically which subcontractors will be used and verify that they are also licensed and insured for their portion of the work. Should
Request a written project timeline with key milestones so you have a documented basis for following up on delays. Should

The Written Contract

Insist on a written contract that specifies exact scope of work, materials (brand, grade, quantity), start and completion dates, and the total price. Must
Ensure the contract includes a clear payment schedule tied to project milestones — never pay more than 10–15% as a deposit before work begins. Must
Confirm the contract addresses how changes to scope will be handled (written change orders signed by both parties) and what the dispute resolution process is. Must
Verify the contract specifies cleanup and debris removal responsibilities before the final payment is released. Should
Ask about warranty terms for both labor and materials — get the specifics in writing, including how warranty claims are submitted. Should

Red Flags to Screen For

Walk away from any contractor who demands full payment upfront or insists on cash-only transactions with no documentation. Must
Be cautious of dramatically low bids — they often signal cut-rate materials, unlicensed subcontractors, or an intent to increase the price mid-project. Should
Avoid contractors who pressure you to decide immediately, discourage you from getting competing bids, or ask you to pull permits yourself. Must
Note whether the contractor is difficult to reach, slow to provide documentation, or vague about licensing details — these patterns tend to worsen once a project begins. Should

Unpermitted Work Can Cost You Later

Work done without required permits isn't just a code violation — it can directly affect your ability to sell or refinance your home. Lenders and buyers routinely discover unpermitted additions or renovations during appraisals or inspections, and the cost to remediate or remove the work often falls on the current owner. Always confirm permit requirements with your local building department before work begins, and verify the permits are actually issued — not just promised.

Never Rely on a Verbal Agreement

Handshake deals and oral promises are nearly impossible to enforce when a dispute arises. Even for small projects, a written contract protects both you and the contractor by establishing a clear, shared record of what was agreed. If a contractor refuses to put terms in writing, treat that as a significant red flag and consider working with someone else.

After the Checklist: Setting Up for a Smooth Project

Completing your vetting process doesn't end your responsibilities as a homeowner. Once you've selected a contractor and signed a solid contract, document the start condition of your property with dated photographs. Establish a single point of contact and agree on how you'll communicate — daily check-ins, weekly summaries, or on-demand messaging.

Keep a project folder — physical or digital — containing your signed contract, permit copies, payment receipts, warranty documents, and any change orders. Change orders (written amendments when the scope shifts) are critical: verbal agreements about additions or substitutions are notoriously difficult to enforce.

Finally, hold your final payment until the work passes any required inspections and you've walked through the completed project yourself. A reputable contractor will expect this and support it. If you're coordinating a contractor visit around a trip away from home, our pre-trip home prep checklist can help you make sure nothing falls through the cracks while you're away.

This article is for general informational and educational purposes only. Licensing requirements, permit rules, and regulations vary by state and municipality. Always verify requirements with your local building department and consult a licensed professional for advice specific to your project and location.