What Is the Fair Market Value of a Home?
Fair market value (FMV) is the price a willing, informed buyer would pay a willing, informed seller in an open and unpressured market, with neither party compelled to act and both having reasonable knowledge of relevant facts. In practice it’s established through comparable sales (a CMA, by a REALTOR®) or a formal appraisal (by a designated appraiser under CUSPAP). Tax authorities, lenders, and courts all use the concept, though their methodologies and required documentation differ.
FMV is not the asking price you saw on a listing, not what your neighbour’s cousin paid in 2022, not the MPAC assessed value on your tax bill, and not what an online AVM (Zillow-style estimator) shows. It’s a market-derived estimate — and reasonable, qualified people looking at the same comps can land on values 5–10% apart. For a deeper treatment of how FMV applies in Canadian real estate contexts (CRA, MPAC, family law, expropriation), see our companion article on fair market value in real estate.
How a CMA establishes FMV
A comparative market analysis selects 3–6 truly comparable recent sales — same building or street, similar size and condition, sold within the last 60–90 days — then adjusts for differences (a basement, an extra bathroom, a renovated kitchen, a finished basement, a parking spot, a view). The adjusted price range is your FMV estimate. The smaller the adjustments and the more recent the comps, the more reliable the result.
Good CMAs explain the math. If a comp sold for $1.05M and the agent adjusted -$30K for a missing parking spot, +$25K for your kitchen renovation, and -$10K for older windows, you should see those adjustments and reasoning, not just a final number. Vague CMAs (“your home is worth $1.0M–1.1M”) without supporting comps and adjustments are sales pitches, not valuations.
How a formal appraisal differs from a CMA
A formal appraisal applies defined methodology under CUSPAP (Canadian Uniform Standards of Professional Appraisal Practice), includes physical inspection by a designated AACI or CRA appraiser, considers all three valuation approaches (sales comparison, income, cost) where relevant, and produces a written report with supporting analysis that meets evidentiary standards. Lenders, courts, and tax authorities require this format. Appraisal cost: typically $400–$700 for a standard residential property; more for unusual properties or rush turnaround.
See our explainer on CMAs vs. appraisals for when each is appropriate. The short version: CMAs for listing decisions and informal FMV checks; formal appraisals for anything that will be reviewed by a lender, court, CRA, or insurer.
Where FMV gets contested
- Estate administration and probate — FMV at date of death drives capital-gains rollover treatment and probate fees.
- Family law (separation, divorce) — FMV at date of separation drives equalization payment.
- Property tax appeals — MPAC reconsideration in Ontario, where you argue assessed value exceeds FMV.
- Expropriation by government — the Expropriations Act requires FMV plus disturbance damages.
- Insurance claims after a major loss — establishing pre-loss FMV vs. replacement cost.
- Capital gains reporting to CRA on property that wasn’t principal residence the entire ownership period.
What FMV is not
FMV is not the asking price (what the seller hopes to receive). It is not what a desperate buyer in a bidding war would pay (that’s a transaction price, not market value). It is not what the seller paid plus inflation. And it is not the MPAC assessed value on your property tax bill — MPAC values are based on a 2016 base date in Ontario and routinely diverge from current FMV by 10–20%+ depending on market movement since the last reassessment.
It is also not a single number. A serious FMV estimate is a range — typically 5–10% wide — reflecting reasonable judgment differences in comp selection, condition assessment, and adjustment magnitude. Anyone who gives you a single sharp number for FMV without a range is overconfident.
When to get a CMA vs. a formal appraisal
Get a CMA when: you’re considering listing, you’re curious about market value for refinancing conversation, you want a sanity check on a private sale price. Get a formal appraisal when: a lender requires it, a court requires it, CRA is auditing your filing, you’re in family-law or estate proceedings, you’re challenging an MPAC assessment formally, or any party other than you needs to rely on the value.
Frequently Asked Questions
- Is FMV the same as my MPAC assessed value?
- No. Assessed value (set by MPAC in Ontario) is a tax base. It often diverges from current FMV by 10–20%+ depending on when the last province-wide reassessment happened. MPAC’s base date is 2016; current values can be substantially different.
- Can I use Zillow-style online estimates as FMV?
- Online AVMs are useful as a sanity check but routinely miss 5–10% in either direction and can’t see condition. Don’t use them as a basis for tax, legal, or transactional decisions — a real CMA or formal appraisal is the right tool for those.
- Does FMV move daily?
- Yes, with the market. A serious CMA dated more than 60 days ago is stale in active markets. For high-stakes uses (CRA, court, lender), get a fresh formal appraisal close to the relevant date.
- How much does a CMA cost?
- Free if requested through a REALTOR® in connection with a potential listing. We provide CMAs as part of a no-obligation home valuation — use our valuation request form.
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Filipe & Isabel Ferreira and the Team Filipehave helped families across Toronto and the GTA for over 20 years. Whether you’re preparing to list, we’ll walk you through every step. Call (647) 298-9299 or book a free consultation.