What does the Tarion warranty cover for bathrooms in newly built Ontario homes?

Tarion warranty coverage applies to bathrooms in newly built Ontario homes and covers defects in materials, workmanship, and building code violations for specific time periods — one year for general defects, two years for water penetration and distribution system issues, and seven years for major structural defects. Understanding what Tarion covers (and doesn't) is essential for anyone buying a new-build home in the GTA.

Tarion is Ontario's new home warranty provider, administered under the Ontario New Home Warranties Plan Act. Every new home built by an HCRA-licensed (Home Construction Regulatory Authority) builder in Ontario is automatically enrolled in Tarion warranty coverage. This applies to detached homes, townhomes, semi-detached homes, and condominium units across the Greater Toronto Area.

One-Year Coverage (Deposit Date + 1 Year)

During the first year, Tarion covers defects in workmanship and materials in your bathroom. This includes cracked or loose tiles that were improperly installed, grout that crumbles or falls out due to poor mixing or application, a toilet that rocks or leaks at the base due to improper setting, vanity doors or drawers that don't close properly, faucets or shower valves that leak or malfunction due to defective installation, exhaust fans that don't function or aren't properly vented, bathroom doors that don't latch or close properly, and paint defects such as peeling or bubbling.

The one-year warranty also covers Ontario Building Code violations, meaning if any aspect of your bathroom doesn't meet code requirements — missing GFCI protection on outlets, inadequate ventilation, improper plumbing connections, or insufficient clearances around fixtures — it must be corrected by the builder.

Two-Year Coverage

The two-year warranty covers water penetration through the building envelope and defects in the plumbing, heating, and electrical distribution systems. For bathrooms specifically, this includes water leaking through exterior walls into bathroom spaces, plumbing supply line or drain defects that cause leaks, shower pan or waterproofing membrane failures that allow water to penetrate into wall cavities or subfloors, heating system defects affecting bathroom radiant floor heating (if the system was builder-installed), and electrical distribution defects including failed GFCI outlets and improperly wired circuits.

The two-year water penetration coverage is particularly important for bathrooms because shower waterproofing failures often don't become apparent until months after occupancy, when enough water has penetrated through micro-cracks in grout or gaps in the membrane to cause visible damage. If you notice water stains on the ceiling below a bathroom, musty odours near shower walls, or soft spots in flooring near the shower or tub during the first two years, file a Tarion claim promptly.

Seven-Year Coverage

Major structural defects are covered for seven years. In a bathroom context, this could apply to structural failure of the floor system supporting the bathroom (though this is rare in properly built homes), foundation defects that cause water infiltration into a basement bathroom, or load-bearing wall defects that affect the bathroom structure.

What Tarion Does NOT Cover

Normal wear and tear is not covered — caulking that dries out and cracks over time, grout that discolours with use, minor settling cracks in drywall, and fading of paint are all considered maintenance items. Tarion expects homeowners to maintain caulking around tubs, showers, and vanities as a routine maintenance task.

Damage caused by homeowner actions is excluded — if you modify plumbing, install aftermarket fixtures, or alter the bathroom in any way, related defects may not be covered. Similarly, damage from failure to maintain proper ventilation (not running the exhaust fan during and after showers) leading to mould or moisture damage may be denied.

Cosmetic items noted after the 30-day pre-delivery inspection (PDI) can be difficult to claim. During your PDI, inspect the bathroom thoroughly: check every tile for cracks, verify grout is complete and consistent, test every faucet and fixture, flush the toilet, run the shower and check for proper drainage, test GFCI outlets, verify the exhaust fan functions and vents to the exterior, and check all caulking.

Filing Claims

Tarion has specific submission windows for warranty claims — a 30-day form after your PDI, a year-end form before the one-year anniversary, a second-year form, and the ability to submit major structural defect claims within the seven-year period. Missing these windows can result in lost coverage. Mark these dates on your calendar from the day you take possession and document any defects with photos and detailed descriptions.

For existing homes being renovated (not new construction), Tarion warranty does not apply — renovations to existing homes are covered by whatever warranty the renovation contractor provides in their contract, typically one to two years for workmanship. Ensure your renovation contract with any GTA bathroom contractor includes a clear warranty clause. Browse qualified bathroom renovation professionals through the Toronto Construction Network directory at torontoconstructionnetwork.com to find contractors who stand behind their work.