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Article · Coverage

You renovated. Your insurance probably didn't catch up.

CoverCheck Editorial · 8 min read · Published 2026-04-15

New basement. New roof. Same old coverage.

85% of homeowners who renovate don't update their insurance. The result: massive underinsurance gaps that only surface during a claim — when it's too late.

Average underinsurance after renovations
30%
Of homeowners who renovate end up with dwelling coverage that doesn't match actual rebuild value — meaning their claim could be reduced by 30-50%.
Source: Insurance Bureau of Canada · CMHC
Coverage report

Here's what we check in 2 minutes.

52
Whether your dwelling coverage reflects current rebuild value
If your personal property limits cover new finishes
Which renovations trigger insurance changes you haven't reported
Am I underinsured after my renos?

The renovations that ALWAYS require an insurance update

1. Finished basement. A basement renovation typically adds $30,000-$80,000 in rebuild value. Standard policies don't automatically increase coverage. If your basement isn't reported, sewer backup limits won't cover the finishes — even if you have the endorsement.

2. Kitchen remodel. A new kitchen with custom cabinets, quartz counters, and high-end appliances can add $40,000-$100,000 in rebuild cost. Sub-limits on personal property may also need adjustment (high-end appliances often exceed default coverage).

3. New roof. Counterintuitively, a new roof requires an update — but for a GOOD reason. New roofs (especially with impact-rated materials like Class 4) unlock 5-15% premium discounts. Most insurers don't apply them unless you report the upgrade.

4. Electrical panel upgrade. Upgrading from 100A to 200A, or from fuses to breakers, can unlock 5-20% discounts. Removing knob-and-tube wiring may double your discount.

5. Addition or expansion. Any square footage addition (deck, garage, sunroom, second story) must be reported. Failing to report can void coverage entirely on the affected area.

6. New swimming pool or hot tub. Increases liability exposure significantly. Most insurers require you to report it and may adjust liability minimums or require fencing.

The renovations that change your coverage requirements silently

Heating system change. Switching from oil to gas, gas to electric, or installing a wood stove changes your fire risk profile. Wood stoves and fireplaces often require WETT certification for coverage.

Solar panel installation. Adds to dwelling value but may require a separate rider depending on the system size. Insurance for solar arrays varies dramatically between insurers.

Home office conversion. If you converted a room into a dedicated home office (especially for business use), some insurers add a small surcharge for business use exposure. Failing to report can void liability coverage for business-related claims.

Rental unit / Airbnb conversion. The biggest underreported change. If part of your home is being rented out (even occasionally on Airbnb), a standard owner-occupant policy doesn't cover it. You need a landlord policy or short-term rental endorsement.

Smart home installation. Some insurers offer 5-10% discounts for connected water leak detectors, smart smoke detectors, monitored alarms. Always report these — they're free money.

How to calculate if you're currently underinsured

The math is straightforward:

Step 1: Find your current dwelling coverage limit (on your declaration page).

Step 2: Estimate your actual rebuild cost. Use $250-$450 per square foot in 2026 (vary by city). For a 2,000 sq ft home in Toronto, that's $500,000-$900,000.

Step 3: Add the value of all renovations done in the past 5 years. Use actual costs (not "what we paid") because rebuild needs the same quality of work.

Step 4: If your coverage is less than 80-90% of step 2+3, you're underinsured. Co-insurance clauses kick in.

For an accurate professional estimate, consider hiring an insurance appraiser ($300-$600 typically). The Insurance Bureau of Canada provides general guidelines for rebuild calculations.

How to update your insurance after renovations

Don't wait for renewal. Coverage changes mid-term — call your insurer or broker immediately after major renovations. Most can adjust within 24-48 hours.

Document everything. Keep receipts, photos, and contractor invoices. Insurers may request these for material changes.

Request a re-quote. Sometimes a major renovation also reveals you should consider a different insurer. New construction (post-2020) often qualifies for new home discounts at competitors.

Specifically request these discounts: roof age update, electrical upgrade, plumbing modernization, smart home devices, alarm system upgrade.

Local opportunity

Average gap: $45,000

The average underinsurance gap on a $400,000 home after typical renovations (kitchen + finished basement + roof) is approximately $45,000 in unprotected rebuild costs — discovered too late when filing a claim.

What's my real gap?

What's your next move?

Two paths depending on what matters most. Both start with the same free 2-minute check.

If you just finished a major reno
Upload your policy. We'll calculate your exact underinsurance gap based on your renovations.
Show me my gap
If you want to claim your reno discounts
Many renovations unlock 5-20% discounts that insurers don't apply automatically. Find yours.
What discounts am I missing?

Information presented is indicative. Premiums and conditions vary by insurer. Consult a licensed broker or insurance agent for an accurate quote.