I get a call about once a month from a homeowner whose renovation has gone sideways. Sometimes it's tens of thousands in unexpected charges. Sometimes it's a permit issue at sale. Once it was a basement that flooded because the contractor's "plumber" wasn't actually licensed.
In nine cases out of ten, the warning signs were on display before the contract was signed. The homeowner just didn't know what to look for.
Here are 12 red flags I'd walk away from on any Ottawa renovation, in order from "concerning" to "run." Each one has a defense and a question to ask.
1. No WSIB clearance certificate
Every legitimate Ontario contractor with employees must carry WSIB coverage. The clearance certificate is a one-page document that proves the contractor is in good standing. It's free to pull and updates every 60 days. If a contractor can't produce it on request, they either don't have coverage or aren't current.
Why this matters: if an uninsured worker gets hurt on your property, the liability can land on you. Ask: "Can you email me your WSIB clearance certificate?" A response time longer than two business days is itself a red flag.
2. "We don't need a permit for that"
In Ontario, structural changes, basement bedrooms, additions over 10 sq m, new plumbing fixture rough-ins, and new electrical circuits all require permits. The contractor saying you don't need one isn't doing you a favour; they're transferring risk to you.
Unpermitted work shows up on title searches when you sell. Ottawa real-estate lawyers we work with see this regularly: deals carved down sharply at closing or killed entirely. Permits are not optional for the work that requires them.
3. Asking for 40% or more deposit
A deposit funds the contractor's startup costs: the first material purchases, the cabinet down payment, the dumpster delivery. Those costs total 8% to 15% of a typical project budget. Any deposit beyond that is funding the contractor's cash flow, not your job.
Industry-standard in Ottawa is 10% to 15% on signing, then milestone payments tied to inspections or installed work. A 50% deposit means the contractor doesn't have working capital. If they ghost or fold, you're an unsecured creditor.
4. A 1-page or 2-page quote
A real Ottawa renovation quote runs 8 to 14 pages. Cover, scope of work, materials list with brands and models, allowances clearly named, schedule, payment terms, change-order policy, warranty terms, insurance certificates. Two pages cannot contain that.
If you receive a one-page quote with a single number, the contractor either hasn't done the estimating work or doesn't want you to see how the number was built. Either way, it's a placeholder, not a price.
5. "We don't need an engineer"
Anytime you're removing a wall, adding a beam, cutting joists for a stairwell, or modifying a foundation, the City of Ottawa permit office requires a structural engineer's letter. The engineer's fee is a separate line, and the timeline runs 2 to 4 weeks.
A contractor who tells you "we'll just put a header in, we don't need an engineer" is either ignorant of the Ontario Building Code or planning to skip permits entirely. Both are reasons to walk. Engineer letters exist for a reason.
6. Verbal-only changes
"Don't worry about the paperwork, I'll just add it to the final invoice." This is how a project quietly balloons into a far larger invoice with nothing in writing. The contractor benefits from informality; the homeowner pays the cost.
Defense: every change in writing, every change signed before work happens, no exceptions. A contractor who pushes back on this is signaling how the rest of the project will go.
7. No fixed timeline
"We'll be done when we're done" or "around 8 to 12 weeks, give or take" is not a schedule. A real schedule names a start date, key milestones (rough-in inspection, drywall, cabinet install, substantial completion), and a target finish date.
Without a schedule, there's no accountability for delays. The crew shows up two days a week. The cabinets arrive late and nobody noticed. Your project becomes their backup project. A written schedule with milestones is non-negotiable.
The "bonded against schedule" question
Ask: "What happens if the project runs more than 4 weeks past the substantial completion date?" Honest contractors have an answer (a per-day credit, a defined remediation process, a clear no-fault clause for material delays). Vague contractors say "that won't happen." Both answers are useful information.
8. No portfolio photos
Twenty years in the trade and a contractor with no recent project photos? That's a red flag. Either they're not finishing projects, they're not happy with the results, or they don't exist as a real business. Every working Ottawa contractor has 20+ photos of completed kitchens, bathrooms, basements, additions.
The photos should be of completed projects, not in-progress shots, and they should include "before" comparison images. A portfolio that's all stock images or all "in-progress" shots is hiding something.
9. No verifiable references
Ask for three Ottawa references from projects completed in the last 12 months. Call them. Ask: "Did the project finish on time? Were there change orders? Would you hire them again? What went wrong, and how did they handle it?"
The "what went wrong" question is the important one. Every project has issues. Honest references talk about how the contractor handled them. Sanitized references that say "everything was perfect" usually aren't real references.
10. Missing or vague trade licensing
In Ontario, electricians need an Electrical Safety Authority licence, plumbers need a Certificate of Qualification, gas fitters need a TSSA licence. The contractor doesn't need to hold all of these personally, but the people doing the work do. If a contractor can't tell you who's pulling the electrical permit, that work isn't being done by a licensed electrician.
This matters at sale. Insurance companies and home inspectors flag unpermitted electrical work. So do buyers. So does the next contractor you call to fix it.
11. Door-to-door or storm-chaser pitches
"I'm working on your neighbour's roof and I noticed your gutters." This is a category of contractor that targets older Ottawa neighbourhoods after storms or in spring. Half the work is real; half is fabricated urgency. Pricing is rarely competitive. Warranties are rarely honoured.
If you didn't reach out to them, they're not the contractor for you. Real Ottawa renovation contractors get their work from referrals, search, and repeat clients. They don't knock on doors.
12. The price that's 25% lower than everyone else's
If two quotes land close together and a third comes in roughly a quarter cheaper, that lowest quote isn't a deal. It's a different scope dressed up to look like the same one. Either the contractor is missing significant scope items, using cheaper materials than the others priced, or planning to make up the gap with change orders.
The cheapest quote in Ottawa renovation almost never finishes as the cheapest job. It just starts that way to win the contract. Compare the line items, not the totals. The total is the marketing. The line items are the truth.
If one quote is dramatically lower than the others, the contract is dramatically different. Read the line items, not the bottom line.
The verification checklist
Before signing any Ottawa renovation contract, verify these in writing:
- WSIB clearance certificate (current within 60 days)
- Liability insurance certificate (multi-million-dollar minimum)
- Business registration (Ontario corporation or master business licence)
- Three Ottawa references with phone numbers, projects from the last 12 months
- BCIN designation if design or permit work is included
- Sample contract reviewed before signing the real one
- Permit responsibility clearly named (who applies, who pays)
- Change-order policy in writing
- Warranty terms in writing (length, what's covered, what's excluded)
- Insurance and licence info for any trades being subbed out
This checklist takes you 90 minutes to complete. The renovation it protects takes 12 weeks and tens of thousands of dollars. The math is obvious.
What a clean signal looks like
The opposite of all 12 flags is what you want: WSIB and insurance certificates produced within an hour of asking, permits explicitly named in scope, 10% to 15% deposit, multi-page quote with itemized scope, structural engineer named where required, all changes in writing, fixed schedule with milestones, photos of recent Ottawa projects, three callable references, licensed trades named, no door-to-door pitch, and a price that's competitive without being suspiciously low.
If a contractor produces all of that without friction, you've found someone running a real business. The interview goes both ways: good contractors are also evaluating you. The conversation should feel like two adults figuring out a project together, not a sales pitch.
If you want to see what a clean, no-pressure intake conversation looks like, that's how we run our Ottawa renovation consultations. We hand over our paperwork before you ask for it. The whole point is making the contract boring, so the renovation can be the interesting part.