Knowing your home’s value is essential — whether you are selling, refinancing, buying insurance, or just tracking your net worth. Here is a practical comparison of every method available in Canada.
Home valuation methods compared
| Method | Accuracy | Cost | Time | Best For |
|---|---|---|---|---|
| Formal appraisal | ±3%–5% | $300–$500 | 3–7 days | Mortgage refinancing, legal disputes, estate purposes |
| CMA (agent) | ±5%–10% | Free | 1–3 days | Listing a home, evaluating a purchase, general market position |
| Online AVM | ±5%–20%+ | Free | Instant | Quick ballpark, tracking trends over time |
| property tax assessment | Not market value | Free (automatic) | N/A | Property tax calculation only |
| Desktop appraisal | ±5%–10% | $100–$250 | 1–3 days | Low-risk mortgage applications (lender may accept) |
Online home value estimators (AVMs)
How AVMs work
AVMs (Automated Valuation Models) use algorithms to estimate property values based on:
- Recent comparable sales data
- Property characteristics (size, age, lot size, number of bedrooms/bathrooms)
- Assessment data
- Listing and sale price trends
- Neighbourhood statistics
Popular Canadian AVMs
| Tool | Coverage | What It Shows | Notes |
|---|---|---|---|
| MPAC (Ontario) | Ontario | Assessment value (not market) | aboutmyproperty.ca — tax assessment, not market value |
| BC Assessment | BC | Assessment value (updated annually) | bcassessment.ca — closer to market than Ontario |
| Redfin (Canada) | Major cities | Estimated market value | Uses MLS data and their algorithm |
| Zillow (Zestimate) | Limited Canadian coverage | Estimated market value | Less reliable in Canada than in the US |
| HouseSigma | Ontario, BC | Sold prices + estimates | Uses MLS sold data — very useful for comparisons |
| Wahi | Ontario, select markets | Estimated market value | Relatively new entrant |
| Bank tools (TD, RBC, etc.) | National | Estimated range | Conservative estimates, used for HELOC pre-qualification |
AVM accuracy by property type
| Property Type | AVM Accuracy | Why |
|---|---|---|
| Standard suburban detached | Moderate (±8%–12%) | Many comparables available |
| Downtown condo | Good (±5%–10%) | High transaction volume, similar units |
| Luxury ($2M+) | Poor (±15%–25%) | Few comparables, unique features |
| Rural / acreage | Very poor (±20%+) | Few sales, non-standard lots |
| Renovated home | Poor to moderate | AVM cannot see interior renovations |
| Revenue property | Poor | AVM does not factor rental income approach |
What AVMs cannot account for
| Factor | Impact on Value |
|---|---|
| Interior condition | A renovated home is worth much more than a dated one of the same size |
| Kitchen and bathroom quality | Can add $20K–$100K that AVMs miss |
| Basement finishing | Finished basements add value AVMs may not capture |
| View and orientation | North-facing vs south-facing, overlooking park vs parking lot |
| Micro-location | Same street can vary by $50K+ depending on specific lot position |
| Unique features | In-law suite, pool, workshop — AVMs handle these poorly |
| Deferred maintenance | Foundation issues, old roof — AVMs assume average condition |
Comparative Market Analysis (CMA)
A CMA is a report prepared by a real estate agent using recent comparable sales:
What a CMA includes
| Component | Details |
|---|---|
| Comparable sold properties (3–6) | Recently sold homes similar to yours in size, location, and condition |
| Active listings (2–4) | Current competition on the market |
| Expired listings (1–3) | Homes that did not sell — showing what the market rejected |
| Adjustments | Price adjustments for differences (extra bedroom, newer kitchen, etc.) |
| Agent’s recommended value | A price range based on the analysis |
How to get a CMA
- Contact 2–3 local real estate agents and request a CMA
- Agents will typically provide this for free (it is how they earn your listing)
- They will review your home (either in person or via photos/video)
- Expect the CMA report within 1–3 days
- Compare the ranges from multiple agents to triangulate value
CMA limitations
- Agent may inflate the estimate to win your listing
- Only as good as the agent’s market knowledge
- Not a legally binding valuation
- Cannot replace an appraisal for mortgage or legal purposes
Formal appraisal
When you need a formal appraisal
| Situation | Required? |
|---|---|
| Mortgage application | Lender will order one (you pay) |
| Refinancing | Lender requires it to determine current LTV |
| HELOC application | Lender requires it |
| Divorce / separation | Often required for property division |
| Estate settlement | Required for probate and tax purposes |
| Tax dispute | If you are challenging your property assessment |
| Selling (general) | Not required but provides confidence |
| Insurance | Replacement cost appraisal for adequate coverage |
Appraisal methodology
| Approach | How It Works | Used For |
|---|---|---|
| Sales comparison | Compares to recent similar sales (like a CMA but more rigorous) | Standard residential properties |
| Cost approach | Estimates land value + replacement cost of building minus depreciation | New construction, unique properties |
| Income approach | Values based on rental income potential (capitalization rate) | Investment properties, multi-unit |
What appraisers inspect
| Item | What They Check |
|---|---|
| Exterior | Foundation condition, siding, roof, drainage, lot grade |
| Interior | Room count, layout, finishes, condition, recent renovations |
| Measurements | Actual square footage (may differ from listing or tax records) |
| Systems | Age and condition of HVAC, electrical, plumbing |
| Comparables | Verify and analyze recent comparable sales |
Property tax assessment
How assessment works by province
| Province | Assessment Body | Valuation Date | Update Frequency |
|---|---|---|---|
| Ontario | MPAC | January 1, 2016 (frozen — was supposed to update) | Indefinitely frozen at 2016 values (as of 2026) |
| British Columbia | BC Assessment | July 1 (previous year) | Annually |
| Alberta | Municipal assessors | July 1 (previous year) | Annually |
| Quebec | Municipal roll | Varies by municipality | Every 3 years |
| Manitoba | Provincial assessment | Varies | Every 2–4 years |
| Saskatchewan | SAMA | Varies | Every 4 years |
Why assessment ≠ market value
| Factor | Assessment | Market Value |
|---|---|---|
| Valuation date | Fixed date (may be years ago) | Current date |
| Interior inspection | Usually none — mass appraisal techniques | Appraisers inspect interior |
| Renovations | Often not captured unless permits were pulled | Reflected in market price |
| Market conditions | Reflects conditions at valuation date | Reflects today’s supply and demand |
| Purpose | Tax calculation only | What a willing buyer would pay |
Tracking your home value over time
Build your own model
| Step | How |
|---|---|
| Baseline | Get a CMA or appraisal when you first buy |
| Track comps | Monitor sold prices of similar homes on HouseSigma, realtor.ca, or through your agent |
| Check assessment | Review your annual assessment notice |
| Note renovations | Track what you have invested and the estimated value added |
| Annual check | Review AVM estimates each year and compare to comps |
When to update your value estimate
| Trigger | What to Do |
|---|---|
| Considering selling | Get a formal CMA from 2–3 agents |
| Refinancing or HELOC | Lender will order an appraisal |
| Completed major renovation | Update your personal estimate based on renovation ROI |
| Market shift | If your neighbourhood sees significant price changes, check comps |
| Insurance renewal | Ensure your dwelling coverage reflects replacement cost |
| Estate or family law | Get a formal appraisal (legally required) |