Written by Tina Wu, Founder of Smart Renovations – a licensed, WSIB-certified renovation contractor serving the GTA since 2017, with 1,000+ completed kitchen and bathroom projects across Toronto, Richmond Hill, Vaughan, Mississauga, and beyond.
Every renovation quote I’ve ever reviewed from a competitor has looked professional on the surface. Clean formatting, a reasonable price, a confident pitch. The difference between a contractor who protects you and one who doesn’t almost never shows up in the quote. It shows up in three documents most homeowners never ask to see: a WSIB clearance letter, a liability insurance certificate, and proof of HST registration.
In nearly a decade of running a renovation company in the GTA, I’ve watched homeowners get burned by contractors who looked completely legitimate right up until something went wrong – a worker got hurt, a wall got damaged, or a tax issue surfaced months later. In every one of those cases, the paperwork would have told the story upfront, if anyone had asked to see it.
This article walks through exactly what to ask for, what each document protects you from, and how to verify it before you sign anything.
Why this matters
Three Documents, Three Risks Transferred Away From You
A renovation contract can look airtight and still leave you exposed if the contractor behind it isn’t properly licensed, insured, or registered. These three documents aren’t formalities. Each one transfers a specific risk away from you and onto the contractor’s business, which is exactly where it belongs.
WSIB Coverage: Protecting Yourself If Someone Gets Hurt
WSIB stands for the Workplace Safety and Insurance Board, Ontario’s workplace insurance system. It exists to cover medical costs and lost wages if a worker is injured on the job, so the injured worker doesn’t have to sue the homeowner or the business directly.
In plain terms: if a worker is injured in your home during a renovation and the contractor doesn’t have proper WSIB coverage, you can end up in the middle of that situation. That’s not a risk worth taking for the sake of skipping a phone call.
What to ask for
A WSIB clearance letter confirming the contractor’s account is in good standing and their workers are covered.
How to verify it
Confirm the clearance letter directly through the WSIB clearance certificate lookup at wsib.ca. Takes about two minutes.
What to watch for
“My workers are independent” with nothing in writing. Ask for the letter regardless of how the work is structured.
Liability Insurance: Protecting Your Property
Liability insurance covers property damage and injury caused during the course of the work – a pipe that bursts, a fire from faulty electrical work, a structural issue that damages part of your home beyond the renovation area.
At Smart Renovations, we carry $5M in liability coverage. Coverage limits below $2M are common among smaller operators, but for work happening inside your home, more coverage means more protection if something serious goes wrong.
What to ask for
A certificate of insurance naming the coverage amount and the policy’s active dates.
How to verify it
A real certificate comes directly from the insurance provider. If anything looks unusual, call the broker listed on it to confirm the policy is active.
What to watch for
“Don’t worry, we’re insured” with no certificate. That’s not a document. Ask before signing, not after.
HST Registration: A Sign of a Properly Run Business
HST registration through the Canada Revenue Agency (CRA) is one of the clearest signals that a contractor is running a legitimate, properly structured business rather than operating informally in cash.
A contractor who is HST registered creates a documented paper trail for the work – invoices, registration numbers, a business that exists on record. That paper trail matters if you ever need to reference the project later, whether for a warranty claim, insurance purposes, or resale documentation.
What to ask for
Their HST registration number, which should appear on invoices and can be referenced through CRA registration records.
What to watch for
Any suggestion that paying cash without HST is the “better deal.” You’re trading a clean paper trail for a short-term discount, with no real recourse if something goes wrong.
Permits and Trade-Specific Licences
Not every renovation requires a permit, but many do – especially anything involving structural changes, electrical panel work, plumbing relocations, or additions. In the GTA, permit requirements vary by municipality, so a contractor who works regularly in your area should be able to tell you, without hesitation, whether your specific project needs one.
Electrical work specifically should always be performed by a licensed electrician. In Ontario, this isn’t optional for safety reasons alone – unpermitted or improperly licensed electrical work can also create real problems later, from insurance claims being denied to issues surfacing during a home sale.
What to ask for
Confirmation of whether your project needs a permit, and if it involves electrical work, confirmation that a licensed electrician is doing that portion specifically.
What to watch for
“We usually just do it without one” or “it’s faster this way.” Skipping a required permit can affect your insurance coverage and your ability to sell the home without complications later.
Your Document Checklist
Before you sign a contract or pay a deposit, request and file each of these.
Credentials to collect
- WSIB clearance letter (verified at wsib.ca)
- Certificate of liability insurance, with coverage amount clearly stated
- HST registration number, visible on invoices and quotes
- Confirmation of permit requirements for your specific project
- Confirmation that a licensed electrician is performing any electrical work
What to do with them
Keep digital and physical copies with your contract. If a dispute, insurance claim, or warranty issue ever comes up, these documents are what establish that the work was done by a properly licensed and insured business.
If These Basics Aren’t There
This part is simple. If a contractor can’t produce a WSIB clearance letter, a real certificate of insurance, and an HST registration number without hesitation or excuses, that’s not a minor gap to overlook. It’s a reason to keep looking. The contractors worth hiring treat these requests as completely normal, because for them, it is.
Once you’ve confirmed a contractor’s credentials check out, the next step is comparing their actual quote against others fairly – on the same scope, with the same level of detail. That’s exactly what Blog 4 covers.
Smart Renovations is a WSIB-certified, fully insured ($5M liability) renovation contractor serving Richmond Hill, Vaughan, Toronto, Mississauga, Markham, Brampton, Etobicoke, Oakville, Aurora, and Newmarket.
