How to vet a contractor before they touch your walls — Guide

25 October 2022

Hiring a contractor can feel like a leap of faith: you're inviting a stranger into your home, handing them a budget, and trusting them with one of your biggest investments. The good news is that a little homework before signing anything can save you months of frustration and thousands of dollars. Here's how to do it right.

Start With the Paperwork

Before you fall in love with a portfolio photo or a smooth sales pitch, confirm the basics. A legitimate contractor should be able to produce, without hesitation:

A current license (if your state or municipality requires one) — verify it directly through the licensing board's website, not just a photocopy
Proof of general liability insurance and workers' compensation coverage; call the insurer to confirm the policy is active
A physical business address and local phone number, not just a P.O. box
A written business name that matches what's on the truck and the contract

If any of these raise hesitation or excuses, walk away. Reputable contractors expect these questions and answer them easily.

Check references the right way

Don't just accept a list of three glowing testimonials. Ask for references from jobs completed recently and from a year or more ago — older references reveal how the work holds up over time. When you call, ask specific questions: Did the project finish on schedule? Were there change orders, and were they handled fairly? Would you hire this person again? If a past client hesitates, that's information too.

Read Reviews With a Skeptic's Eye

Online reviews are useful, but they're also easy to game. Look for patterns rather than individual stars. A contractor with dozens of reviews mentioning communication problems or abandoned punch lists deserves scrutiny, even if the overall rating looks fine. Likewise, a suspiciously uniform block of five-star reviews posted within a short window can signal something manufactured. Cross-check reviews across multiple platforms, and pay special attention to how the contractor responds to negative feedback — defensiveness or hostility is a red flag; calm, professional resolution is a good sign.

Get Multiple Bids — and Compare Them Carefully

Aim for at least three bids, and make sure each one is itemized in writing. A vague one-page estimate with a single lump sum makes it impossible to compare fairly or to hold anyone accountable later. When reviewing bids, look for:

A clear scope of work: materials, brands, model numbers where relevant
A payment schedule tied to milestones, not large upfront sums
Start and completion dates, with a process for handling delays
Who pulls permits and who schedules inspections

Be wary of the lowest bid that comes in dramatically below the others. It often means corners will be cut, materials substituted, or the "real" costs will appear later as change orders.

Watch for Red Flags in the First Conversation

Your gut matters here. Be cautious if a contractor pressures you to sign immediately "to lock in a discount," demands a large cash payment before any work begins, insists you handle the permits yourself, or can only be reached through a cell number with no verifiable business presence. High-pressure tactics and cash-only deals are classic warning signs, and so is a contractor who dismisses your questions as unnecessary detail.

Put Everything in Writing

Finally, never rely on a handshake. A solid contract should spell out the full scope, materials, timeline, payment schedule, warranty terms, and how disputes or changes will be handled. Keep copies of all correspondence, and document the work with photos as it progresses. The best contractors welcome detailed contracts — they protect everyone involved.

Vetting a contractor takes an afternoon or two of effort, but that diligence is the cheapest insurance you'll ever buy for your home. Do the homework, trust the evidence over the sales pitch, and your walls will be in good hands.