Every contractor I've ever met says they're honest, careful, and on time. The bad ones say it more often. After 20 years in Ottawa, I can usually tell within ten minutes of a phone call whether a builder will finish a job or leave the homeowner stuck halfway through with a gutted kitchen and no one showing up to finish it.
You can learn the same read. It comes down to a handful of questions, two pieces of paper, and a willingness to walk away when the answers don't add up. Here's the checklist I'd give my own sister if she was hiring someone to renovate her house.
The Two Documents You Ask For Before Anything Else
Before price, before timelines, before you even discuss what you want done, you ask for these. In writing. By email.
- WSIB clearance certificate. This is one page from the Workplace Safety and Insurance Board. It proves the contractor's premiums are paid up. If a worker falls off a ladder on your property and the contractor doesn't have WSIB, your homeowner policy is on the hook for the medical claim. The certificate is free to request and takes 30 seconds to generate. Anyone who can't produce one in 24 hours either doesn't pay it or doesn't know they have to.
- $2 million general liability insurance certificate with your home address listed as the project site. This covers property damage during the job: water damage, fire, the truck that backs into your garage door. The certificate must be current and must name you. A photo of last year's policy is not good enough.
If a contractor pushes back on either of these, the conversation is over. Real builders are used to providing them. They have them ready.
Pro tip
Call the insurance broker number listed on the certificate to verify it's still active. Policies get cancelled mid-year for non-payment more often than you'd think. A 60-second call can save you from a major uninsured loss.
BCIN: When You Actually Need It
BCIN (Building Code Identification Number) is the Ontario qualification for designing or reviewing anything that needs a building permit. If your project involves structural changes, a basement legalization, an addition, or a coach house, the person stamping the drawings needs a BCIN under the right category.
For a basic bathroom or kitchen with no structural work, BCIN is not required. For anything that touches load-bearing walls, foundations, or building envelope, it is. Ask the contractor: "Who is BCIN-certified on your team, and under which category?" The right answer is a name and a number, not "we work with a guy."
Categories you'll see on Ottawa residential work: House (the broad one), Small Buildings, Building Structural, HVAC, and Plumbing. For a typical home reno, House and Small Buildings cover most of it.
In-House Crew vs. Subcontractor Roulette
Two business models exist in Ottawa renovation. Both can produce great work, but they fail differently.
In-house crew means the company has carpenters, finishers, and a project manager on payroll. Plumbing and electrical are still subbed (always, by law) but the framing, drywall, finish work, and tile is done by people who answer to one boss. Quality is more consistent. Schedules hold better. The work tends to cost 8-12% more.
Sub-only crew means the contractor is mostly a project manager who hires a different sub for every trade. Cheaper to run, more flexible, but the wheels come off when a sub gets sick or takes a bigger job. You're at the mercy of whoever shows up that week.
Ask: "Of the people who will be on my project, how many are your employees and how many are subs?" Then ask: "Who is on site every day, and what's their phone number?" If they can't name a single human being who will be there daily, you're going to be that person.
Fixed-Price vs. Cost-Plus (This Is the Big One)
The contract structure decides who eats the cost of mistakes. There are really only two real options in Ottawa residential work.
Fixed-price (lump sum): The contractor quotes a number, and that's the number, regardless of what they hit. If demo reveals a rotten subfloor, that's their problem. The only thing that increases the price is a written change order you sign. This is what you want for a defined-scope project (kitchen, bathroom, basement).
Cost-plus (time and materials): The contractor bills you for actual labour hours and material costs, plus a markup of 15-25%. You see the receipts. The catch is that the contractor has zero incentive to work fast or buy efficiently. Every extra hour is more revenue.
Cost-plus has a place: very large custom homes, additions where the scope genuinely can't be defined upfront, and clients who want full transparency. For a typical kitchen or basement, fixed-price is the only structure that protects you. If a contractor refuses to give you a fixed number after seeing the space and the drawings, ask why. The honest answer is usually "because the drawings aren't detailed enough yet." Fix that first, then get the number.
The contract structure tells you who is afraid of which risk. A fixed-price contractor is afraid of underestimating. A cost-plus contractor wants you to be afraid of every change order. Pick the one whose fear is aligned with yours.
The Reference Calls That Actually Matter
Three references, all with photos, all from jobs at least 12 months old.
Recent references look good because the trim is fresh and the homeowner is still high on the new kitchen. The reference that matters is the one where the homeowner has lived with the work for a full year. The cabinets have been opened 5,000 times. The grout has seen a winter. The paint has had a summer of humidity.
What to ask the reference, in this order:
- Did the project finish on the date in the original contract?
- How many change orders did you sign, and what was the total dollar value of changes versus the original quote?
- Was there a punch list at the end? How long did it take to clear?
- Has anything failed or come loose in the year since? How did the contractor respond?
- Would you hire them again, knowing what you know now?
Question 5 is the one. People will hesitate before lying. Listen for the pause.
Contract Clauses That Protect You
The contract should be longer than the quote. Real contracts have these clauses, written plainly:
- Scope of work with drawings or detailed specs attached. "Renovate kitchen" is not a scope. "Remove existing cabinets, install 14 new lower and 11 new upper cabinets per attached spec sheet, including..." is a scope.
- Payment schedule tied to milestones, not dates. "Draw 2 due upon completion of rough-in plumbing inspection" is correct. "Draw 2 due June 15" is not.
- Change order procedure. Any change must be in writing, priced, and signed by you before work proceeds. No verbal agreements count.
- Warranty terms. What's covered, for how long, and what voids it. Our standard is a 1-year DTR workmanship warranty on top of manufacturer warranties, and 10-year structural on additions.
- Cleanup and disposal. Whose dumpster, whose responsibility, what condition the site is left in.
- Lien holdback. 10% holdback for 60 days after substantial completion is standard under the Ontario Construction Act.
Deposit Structure (and the Number That Should Make You Nervous)
Healthy deposit structure on an Ottawa residential reno:
- 10-15% on contract signing (covers design finalization, permit application, ordering long-lead items like cabinets)
- 20-25% on materials delivery / demo start
- 20-25% at rough-in inspection
- 20-25% at substantial completion
- 10% holdback released 60 days after substantial completion
Anyone asking for 40-50% upfront is using your deposit to finish someone else's job. That's how renovation companies collapse. The deposit funds the next job, that one's deposit funds the previous job, and one slow month brings the whole thing down. You don't want to be the homeowner standing in the empty kitchen when it falls.
Red Flags in the First Conversation
You can spot most of the bad ones in 15 minutes. The signs:
- Quotes a price before seeing the space (or after a 5-minute walkthrough). Real numbers come from real measurements.
- Pressures you to sign today. "If you book this week I can get you my crew in two weeks." Real crews are booked 6-12 weeks out.
- Takes cash for a discount. Cash discount means no paper trail, no warranty, no recourse.
- Doesn't have an office or a registered business address. Truck-and-cellphone operations vanish.
- Speaks badly about every other contractor they've heard of. Real builders respect their competition.
- Asks you to apply for the permit yourself "to save money." This shifts liability to you for any code violations and tells you they don't have a designer who can stamp it.
The Good Ones Look the Same
The contractors who finish well in Ottawa share a profile. They've been around 10+ years. They have a real office. The proposal is detailed and a bit boring to read. They invite you to visit a current job site. They tell you "no" when you ask for something dumb instead of nodding and adding it to the price. They charge 10-15% more than the cheapest quote.
That premium isn't profit, it's coverage. It's the WSIB premium that's actually paid. It's the second coat of paint nobody else priced. It's the project manager who answers the phone at 7pm.
If you want to compare what a properly-structured Ottawa renovation looks like, walk through how we run our home renovation projects. It's the same process whether the budget is for a single room or a full-house renovation.