How to Vet a Bathroom Contractor in Newmarket

Comparing bathroom renovation quotes in Newmarket can feel murky when one company hands you a single lump-sum number on the back of a business card and another promises to start tomorrow for cash. Because the waterproofing membrane, drain slope, venting and electrical junctions that keep a bathroom safe are sealed behind porcelain tile within the first two weeks, checking a contractor’s paperwork and build methods before signing is your best protection. Use the seven checks below on every company you interview—including ours.

1. Confirm WSIB, insurance, ESA licensing and provincial records

Active WSIB clearance. In Ontario, construction employers and independent operators are legally required to maintain Workplace Safety and Insurance Board coverage (subject only to narrow statutory exemptions). Source: Government of Ontario: Your rights when starting home renovations or repairs (accessed October 10, 2026) Ask every bidder for a current WSIB clearance certificate and verify the certificate number on the WSIB online portal before work begins. Source: WSIB Ontario: Clearances (accessed October 10, 2026) Hiring an unregistered crew exposes the homeowner to liability if someone is hurt on site.

Commercial general liability insurance. Request a certificate of insurance carrying the exact business or operating name shown on your contract. If you are renovating a suite in a Davis Drive, Yonge Street or Glenway condo building, property management will require this certificate—naming the condominium corporation as an additional insured—before signing off on your small or condo bathroom remodel.

Ontario Consumer Beware List. Run a quick search of both the company name and the principal’s name on the Government of Ontario’s Consumer Beware List to check for unresolved Ministry orders or Consumer Protection Act convictions. Source: Government of Ontario: Consumer Beware List (accessed October 10, 2026)

Licensed Electrical Contractor (ESA). Under Ontario law, only a Licensed Electrical Contractor (LEC) registered with the Electrical Safety Authority may install new pot lights, GFCI circuits, heated-floor mats or fan wiring for hire. You can confirm an electrical licence in thirty seconds using the ESA Contractor Locator. Source: Electrical Safety Authority: Contractor locator (accessed October 10, 2026)

2. Compare line-by-line written estimates, not lump sums

Provincial consumer guidelines advise gathering written estimates from multiple contractors and comparing the exact scope included by each. A reliable bathroom quote prices demolition and disposal, rough plumbing, electrical, framing, waterproofing membrane, tile setting, vanity installation and custom shower glass on separate lines, and clearly distinguishes installation labour from finish materials. Check our Newmarket bathroom renovation cost guide to see how we publish our packages and line items.

Be wary of a vague one-line quote. When an estimate omits basics—like replacing corroded shut-off valves, installing 2x8 wood blocking for grab bars, or ducting an old attic fan outdoors—those items either get skipped behind the wall or show up as costly extras halfway through the job.

Photo estimates first, on-site verification before contract

Starting with a photo and video estimate—as we do in our 5-step renovation process—is a smart way to verify that a contractor’s pricing fits your budget before booking appointments. Once you are ready to proceed, Ontario consumer guidance reminds homeowners never to sign a binding contract until the contractor has visited the home, measured the room in person, and confirmed the written estimate on site. Source: Government of Ontario: Your rights when starting home renovations or repairs (accessed October 10, 2026)

3. Attach the itemized estimate to your written contract (the Ontario 10% rule)

Under Ontario’s Consumer Protection Act, when a written estimate is incorporated into your signed home renovation contract, the contractor is legally barred from charging more than 10% above the agreed estimate unless you approve new or changed work in writing.

Every residential renovation agreement over $50 in Ontario must be in writing and contain: Source: Government of Ontario: Your rights when starting home renovations or repairs (accessed October 10, 2026)

• The contractor’s legal business name, physical address and telephone number (see our about page and terms of use).
• A full itemized description of the construction work and any materials supplied.
• The total price including HST, initial deposit and milestone payment schedule.
• Estimated start and completion dates.
• Explicit written labour warranty coverage and daily site protection and debris haul-away terms.

For a Newmarket project, make sure the contract also specifies who submits the application if the layout requires a municipal building permit; read our guide to Newmarket bathroom renovation permits.

4. Keep the deposit reasonable and tie payments to visible milestones

Provincial consumer advice recommends keeping upfront deposits modest—around 10%—and tying each subsequent payment to a concrete stage you can inspect in person: demolition and framing complete, rough plumbing and electrical passed, waterproofing and tile finished, and final handover complete. Never pay the full contract balance before the final walkthrough, and keep a written receipt for every payment.

5. Remember your 10-day statutory cooling-off period

When you sign a home renovation contract worth $50 or more at your residence in Ontario, the Consumer Protection Act grants you a 10-day cooling-off window during which you may cancel the contract in writing for any reason without penalty.

6. Ask to see how they waterproof showers before tile goes on

Most expensive bathroom repair calls we take in Newmarket are caused by showers that were tiled over bare drywall or an unsealed mortar pan. Before hiring anyone to build a walk-in shower, ask four specific questions:

1. Which waterproof backer board and sheet or liquid membrane system do you install behind the shower tile?
2. How are inside corners, the shampoo niche, the bench and the drain flange sealed?
3. How do you verify second-floor joist framing before promising a recessed curbless shower entry?
4. Can you show me photos of your own showers at the waterproofing and tile-levelling stage?

A seasoned bathroom crew will answer immediately and show you real job-site photos. You can inspect our completed and in-progress work across our before and after gallery, including our Newmarket dual walk-in shower renovation and Yonge Street condo shower case study.

7. Read local reviews with project specifics

Look for homeowner testimonials that mention responsiveness, tile quality, cleanliness and how punch-list adjustments were handled—like the Newmarket reviews from Steve J. and Lawrence on our client reviews page.

Want a clear, line-by-line written quote to compare against other bids? Upload photos of your bathroom on our free quote page or call our team at (647) 557-5735.