How to Choose a Renovation Contractor in Hamilton

Hiring the wrong contractor is the single biggest reason renovations go sideways. Not material delays, not permit issues, not bad weather — the wrong contractor. We’re contractors ourselves, and we’ve seen the aftermath more times than we’d like: half-finished basements, bathrooms torn apart with no one returning calls, deposits gone with nothing to show for them.

So here’s what we’d tell a friend before they hire anyone in Hamilton or Burlington.

Check Credentials First

Ontario doesn’t require a general contractor license the way some provinces do, which means anyone with a truck and a business card can call themselves a contractor. That makes your due diligence even more important.

Before you sign anything, ask for:

WSIB clearance certificate — This confirms the contractor is registered with the Workplace Safety and Insurance Board and their account is in good standing. If a worker gets injured on your property and the contractor doesn’t have WSIB coverage, you could be held liable. Ask for the certificate number and verify it on the WSIB website.
Liability insurance ($2M minimum) — General liability insurance protects you if the contractor damages your property during the renovation. $2 million is the standard minimum in Ontario. Ask for a copy of the certificate of insurance, not just a verbal confirmation.
Business registration — A legitimate contractor should have a registered business in Ontario. Ask for their HST number. If they don’t charge HST, that’s a problem.
Certificate numbers you can verify — Any contractor who hesitates to provide certificate numbers for WSIB or insurance is telling you something. Legitimate contractors hand these over without blinking.

We provide all of this upfront to every client before they even ask. That should be the standard.

Look at Actual Work, Not Just Reviews

Online reviews matter, but they only tell part of the story. A contractor can have a perfect Google rating and still do work that doesn’t hold up.

Here’s how to go deeper:

Ask for addresses of completed projects. A good contractor should be able to point you to homes in Hamilton, Burlington, or the surrounding area where they’ve done work. Not stock photos — actual addresses.
Drive by if you can. You won’t see the interior, but you can get a feel for exterior work quality and whether the contractor takes pride in the finished product.
Ask for references you can actually call. Not testimonials on a website — real phone numbers of past clients who can tell you what the experience was like. Ask about communication, timeline accuracy, and how the contractor handled problems.
Check both Google Reviews and HomeStars. Cross-reference. Look for patterns in negative reviews. One bad review could be a difficult client. Three bad reviews mentioning the same issue is a pattern.

When we finish a bathroom renovation in Burlington or a basement project in Hamilton, we expect our clients to be willing to vouch for the work. That’s the bar.

Red Flags to Watch For

We’ve been in this industry long enough to know what the warning signs look like. If you see any of these, walk away:

Asking for 50% or more upfront. A deposit is normal. Half the project cost before a single board is cut is not. This is the most common setup for a contractor who disappears.
No written contract. “We’ll figure it out as we go” is not a renovation plan. It’s a guarantee of disputes.
“Cash discount” pressure. If a contractor pushes you to pay cash to avoid HST, they’re asking you to participate in tax fraud. It also means you’ll have no paper trail if something goes wrong.
Can’t provide WSIB or insurance certificates. Full stop. No paperwork, no deal.
Vague timelines. “We’ll get started in a few weeks” or “it should take about a month” isn’t a timeline. You need specific start dates and projected completion dates.
No discussion about permits. If your renovation requires permits (and many do — structural changes, plumbing, electrical), a contractor who doesn’t bring this up is either cutting corners or doesn’t know what they’re doing. Both are bad.

What a Good Contract Should Include

Your contract is your protection. A handshake deal protects nobody. Here’s what should be in writing before any work begins:

Detailed scope of work — Every item should be listed. Not “renovate kitchen” but “remove existing cabinets, install 14 linear feet of shaker-style uppers and lowers, install quartz countertop…” The more specific, the fewer disputes later.
Payment schedule tied to milestones — Payments should be linked to completed stages of work, not calendar dates. For example: deposit on signing, second payment after demolition and rough-in, final payment on completion and walkthrough.
Start and completion dates — Both should be in the contract. Include language about what happens if the timeline slips.
Change order process — Renovations often uncover surprises, especially in older Hamilton homes. Your contract should spell out how changes are handled: written approval required, cost impact documented before work proceeds.
Warranty terms — What does the contractor stand behind, and for how long? Labour warranty of at least one year is standard. Many materials carry their own manufacturer warranties on top of that.
Permit responsibility — The contract should state who is responsible for pulling permits and scheduling inspections. In almost every case, this should be the contractor.

When we quote a basement renovation, every one of these items is in our contract before we start. No exceptions.

Questions to Ask Before Signing

Once you’ve narrowed your list, sit down with each contractor and ask these directly:

Who manages the project day-to-day? Some companies sell the job and then hand it off to a crew you’ve never met. You want to know who your point of contact will be throughout the project.

What’s your payment schedule? Compare it to the milestone-based approach above. If it’s front-loaded (heavy payments early, small payment at the end), that’s a leverage problem for you.

Do you pull permits? The answer should be yes, followed by specifics about which permits your project requires. If the contractor says “you don’t need permits for this” on a project that clearly requires them, that’s a red flag.

What happens if the project goes over budget? Legitimate contractors will explain their change order process. If the answer is “it won’t go over budget,” they’re either inexperienced or not being straight with you.

How do you handle change orders? You want to hear: written documentation, your approval required before additional work, clear pricing for the change. You don’t want to hear: “we’ll sort it out at the end.”

Frequently Asked Questions

How much should I pay upfront?

A deposit of 10-15% is standard in the Hamilton and Burlington market. Some contractors ask for up to 25% on larger projects to cover material orders, which can be reasonable if the materials are specified in the contract. Anything above 30% before work begins should give you pause. Never pay the final 10% until you’ve done a walkthrough and confirmed the work is complete.

How many quotes should I get?

Three is the standard advice, and it’s good advice. But don’t just compare the bottom line. Compare what’s included in each quote. The cheapest quote often leaves out items the other two included — and those items show up later as extras. Make sure you’re comparing the same scope of work across all three.

Should I hire a general contractor or individual trades?

For anything beyond a single-trade job (like just replacing a furnace or just doing electrical work), hire a general contractor. A GC coordinates scheduling between trades, manages the permit process, and takes responsibility for the project as a whole. Managing individual trades yourself sounds like it saves money, but it usually costs more in time, mistakes, and scheduling conflicts. The coordination alone is worth the GC’s fee on any multi-trade renovation.

Choosing a contractor is the most important decision you’ll make in your renovation. Take the time to verify credentials, check real work, and get everything in writing. The right contractor won’t just build what you want — they’ll communicate clearly, stick to the plan, and stand behind their work when it’s done.

Ready to talk about your project? Request a free renovation estimate and we’ll walk you through exactly how we work — no pressure, no surprises.

How to Choose a Renovation Contractor in Hamilton (Without Getting Burned)