Home Appraisal vs. MPAC Assessment vs. Realtor CMA: What’s the Difference in Ontario?
If you own a home in Ontario, you may have several different numbers attached to the same property. Your MPAC assessment shows one value. A Realtor may prepare a comparative market analysis, often called a CMA, and suggest another. A professional real estate appraisal may arrive at a third. It is completely reasonable to wonder which number is “right.”
The answer is that these tools are created for different purposes. They may use some of the same market evidence, including recent sales of similar properties, but they are not interchangeable. The intended use, effective date, level of analysis, professional standards and type of report all matter.
Understanding the difference can help you decide what you actually need, whether you are refinancing, planning an estate, separating from a spouse, completing a family buyout, challenging a property assessment, selling privately, dealing with litigation or simply trying to understand your property’s current market value.
What Is a Professional Real Estate Appraisal?
A real estate appraisal is a professional opinion of value developed for a specific property, purpose and effective date. The appraiser researches the subject property, analyzes relevant market evidence and applies recognized appraisal methodology to develop a supported value conclusion.
For residential properties, the direct comparison approach is commonly important because buyers and sellers often make decisions by comparing one property with other competing properties. The appraiser selects sales considered relevant to the subject and analyzes differences such as location, lot characteristics, living area, age, condition, renovations, basement finish, garage facilities, bathrooms and other features that may influence buyer behaviour.
The goal is not simply to find the closest sale or calculate an average price per square foot. The goal is to determine which market evidence best reflects how the subject property competes in its market.
A professional appraisal is also assignment-specific. The value needed for a refinance today may not be the same type of valuation needed for a date-of-death estate matter from several years ago. A retrospective appraisal can address a historical effective date, while an as-complete appraisal may consider a property as though proposed construction or renovations were complete, subject to appropriate assumptions and conditions.
AIC-designated appraisers work within the Canadian Uniform Standards of Professional Appraisal Practice, commonly referred to as CUSPAP. Those standards address the development and communication of professional appraisal assignments and are intended to support credible, non-misleading reports.
What Is a Realtor Comparative Market Analysis?
A comparative market analysis is generally prepared by a real estate professional to help a property owner understand a likely listing range or selling position in the current market.
A CMA can be extremely useful when the primary question is, “How should I position my home for sale?” A Realtor may review recent sales, current listings, expired listings, competing inventory, days on market and the condition or presentation of competing homes. Their experience with active buyers and current listing activity can provide valuable insight into how a property may perform if exposed to the market.
However, a CMA and an appraisal serve different functions. A CMA is typically prepared in connection with marketing or brokerage advice. A professional appraisal is a formal valuation assignment developed for a defined client, intended use, property interest and effective date.
That distinction becomes particularly important when a value is needed for a lender, lawyer, accountant, court proceeding, estate, tax matter, matrimonial matter, partner dispute or another situation where an independent valuation report may be required.
A Realtor and an appraiser may review some of the same comparable sales and still reach different conclusions because they are answering different questions.
What Is an MPAC Property Assessment?
MPAC, the Municipal Property Assessment Corporation, assesses and classifies properties in Ontario for the property taxation system. Municipalities use those assessments as part of the process for determining property taxes.
An MPAC assessment should not automatically be treated as the current market value of your home today.
This distinction is especially important in 2026. MPAC states that property assessments for the 2026 property tax year continue to be based on a January 1, 2016 valuation date. That means the assessed value appearing on an Ontario property assessment notice may be tied to a legislated valuation date that is very different from the effective date required for a current appraisal.
MPAC also uses mass appraisal. For residential properties, it analyzes sales and property information across market areas using standardized methods. A professional appraisal, by comparison, is an assignment focused on the specific subject property and the particular valuation question being asked.
Both processes can involve market evidence, but their scale, effective date and intended use are different.
Why Can the Three Values Be Different?
The most important reason is that value is not just a number. A meaningful value conclusion has a date, a purpose and a definition behind it.
Imagine an Ontario homeowner looking at three figures:
The MPAC assessment reflects the assessment system and its legislated valuation date.
A Realtor’s CMA is prepared to help decide how to position the property in today’s listing market.
An appraisal is completed to estimate market value for a specific intended use and effective date.
Even if all three professionals are knowledgeable and all three analyses are competently prepared, the figures do not have to match.
Market conditions can change substantially over time. Interest rates, inventory, buyer demand, neighbourhood development, employment conditions and the supply of competing properties can influence prices. The property itself can also change through renovations, additions, deterioration, changes in use or improvements to the site.
The effective date therefore matters enormously.
Which Value Does a Bank or Mortgage Lender Use?
For financing and refinancing, a lender may require an appraisal completed for the lending assignment. The lender or appraisal management company may have its own requirements concerning the appraiser, report format, property inspection and authorized users.
A homeowner’s tax assessment or a Realtor’s suggested listing price does not necessarily satisfy those requirements.
The appraisal allows the lender to consider a professionally developed opinion of the property’s value as part of its overall lending decision. The appraisal does not approve the mortgage and does not determine whether the borrower qualifies. Lending decisions remain with the lender.
If you are refinancing, it is therefore important to find out who must order the appraisal and whether the lender has specific appraisal instructions before commissioning a report independently.
Which Value Should You Use for an Estate or Probate Matter?
Estate assignments often require a value as of a particular date, such as a date of death. That can make a current CMA or current tax assessment unsuitable for the actual question.
A retrospective appraisal can research market conditions and comparable sales relevant to the required historical effective date. The appraiser is not trying to estimate what the property is worth today and then simply “work backward.” The analysis should be tied to the market evidence that was relevant to the historical date.
This is one reason the effective date should be confirmed at the beginning of an estate appraisal assignment.
Which Value Is Appropriate for Divorce or Matrimonial Matters?
Matrimonial assignments can also require a value for a defined date rather than simply today’s value. The appropriate date and intended use should be confirmed with the client and, where applicable, their legal advisor.
An independent appraisal can be particularly useful when both parties need a valuation that is supported by market evidence and prepared independently of a potential listing.
A Realtor’s CMA may still be helpful if the parties are actually preparing to sell the property. It simply answers a different question from a formal appraisal prepared for a matrimonial valuation assignment.
What About a Family or Beneficiary Buyout?
Family transactions can look simple because the parties know each other, but that relationship can make an independent value even more useful.
For example, one sibling may want to keep an inherited property while the others receive their share in cash. A parent may transfer an interest to a child. One co-owner may buy out another. In these situations, relying only on a tax assessment or an informal estimate can create disagreement because the parties may have different expectations.
An independent appraisal provides a defined valuation date and a documented analysis that the parties and their professional advisors can consider when discussing the transaction.
Does MPAC Assessment Matter When Challenging Property Taxes?
Yes, but the question is different from a typical current market value appraisal.
MPAC determines property assessments, while municipalities use assessments in the property taxation system. For the 2026 property tax year, MPAC says assessments continue to be based on January 1, 2016 current values.
If a property owner disagrees with an assessment, the relevant analysis needs to address the assessment framework and applicable valuation date rather than simply showing what the property could sell for today.
This is why a current appraisal dated in 2026 is not automatically evidence of what a property should have been assessed at as of January 1, 2016. The effective date must match the issue being analyzed.
Can You Use the Purchase Price as the Property’s Value?
A recent arm’s-length sale of the subject property can be important market evidence, but a sale price and a market value opinion are not automatically the same thing.
A transaction can be affected by the motivations of the buyer and seller, marketing exposure, property condition, financing terms, negotiations and other circumstances. An appraiser considers the transaction in context and analyzes other relevant market evidence.
MPAC similarly distinguishes between a sale price and assessed value. Its assessment process analyzes sales across a market area rather than simply assigning every recently purchased property its individual purchase price.
Why the House Next Door May Not Determine Your Value
Homeowners naturally pay attention to nearby sales. Sometimes the house next door is excellent evidence. Sometimes a property farther away is more comparable.
Two neighbouring homes can differ in living area, lot utility, renovation quality, basement finish, garage capacity, view, condition, layout or other features. One sale may also have occurred under market conditions that are less relevant to the appraisal’s effective date.
Comparable selection is therefore about competitive similarity and market relevance, not distance alone.
This is also why automated estimates can be misleading for unusual properties. Rural homes, waterfront properties, multi-residential buildings, custom homes, properties with accessory units and homes undergoing substantial renovation may require more detailed property-specific analysis.
Is Price Per Square Foot Enough?
Price per square foot can be a useful market statistic, but it should not be treated as a complete appraisal method on its own.
A smaller renovated home on a superior lot can sell at a higher rate per square foot than a larger dated home. A finished basement does not necessarily contribute value at the same rate as above-grade living area. Garages, lot characteristics, condition, location and overall utility can all affect how buyers react to a property.
Appraisers analyze the property as a whole and consider how the market recognizes meaningful differences.
When Is a Realtor CMA the Better Tool?
A CMA can be the right tool when you are considering listing your property and want practical advice about pricing strategy, competing listings and current buyer activity.
If your goal is to sell, a knowledgeable local Realtor can provide valuable information about how the property should be positioned and marketed.
You do not necessarily need a formal appraisal for every real estate decision.
When Is a Professional Appraisal the Better Tool?
A professional appraisal becomes particularly useful when the value needs to stand independently from a potential sale or when a third party needs a supported valuation.
Common examples include financing and refinancing, estate and probate matters, divorce and matrimonial matters, capital gains and tax-related assignments, litigation, family or beneficiary buyouts, private sales, power of sale matters, retrospective valuation, construction financing, progress inspections, market rent studies and certain property assessment matters.
The exact scope of work depends on the assignment. A good starting point is to explain why you need the value, who will rely on the report and what effective date is required.
What Should You Give the Appraiser?
Providing accurate property information can help the appraisal process. Useful documents may include a survey, floor plans, renovation details, building permits, leases for rental units, construction budgets, plans and specifications for proposed work, or information about unusual property features.
Not every assignment requires every document. The appraiser can identify what is relevant after understanding the property and intended use.
It is also helpful to mention renovations or additions that may not be obvious during a visual inspection and to explain any unusual circumstances affecting the property.
Which Number Should You Trust?
Instead of asking which number is universally “correct,” ask which valuation tool is appropriate for the decision you are making.
If you want to know how to list and market your home, a Realtor’s CMA may be the most useful starting point.
If you are reviewing your Ontario property assessment and taxes, the MPAC assessment and applicable assessment framework matter.
If you need an independent, property-specific opinion of value for a defined purpose and effective date, a professional appraisal is generally the appropriate valuation product.
The key is matching the tool to the question.
The Bottom Line
An appraisal, an MPAC assessment and a Realtor CMA can all provide useful real estate information, but they are not substitutes for one another.
MPAC assessments support Ontario’s property assessment and taxation system and are tied to a legislated valuation date. A Realtor CMA is commonly used to support listing and marketing decisions. A professional appraisal provides a property-specific opinion of value developed for a defined intended use and effective date.
Understanding those differences can prevent confusion and help homeowners, lenders, lawyers, accountants, executors, beneficiaries and other decision-makers request the right type of valuation from the beginning.
Need a Professional Real Estate Appraisal?
Cade Appraisals provides residential and commercial real estate appraisal services throughout Southern Ontario, including Niagara Region, Hamilton, Halton, Haldimand, Brant and Norfolk.
We assist homeowners, lenders, lawyers, accountants, executors, beneficiaries, investors and other clients with appraisal assignments for financing, estates, matrimonial matters, taxation, litigation, private sales, family buyouts, retrospective valuations, construction and other property-related needs.
If you are unsure whether you need a current appraisal, retrospective appraisal, market rent study or another valuation service, contact Cade Appraisals and explain what the report will be used for. We can help determine the appropriate appraisal assignment before the work begins.
Frequently Asked Questions About Appraisals, MPAC Assessments and CMAs
Is an MPAC assessment the same as a home appraisal?
No. An MPAC assessment is prepared for Ontario's property assessment and taxation system and is tied to the applicable legislated valuation date. A professional appraisal is a property-specific opinion of value prepared for a defined intended use and effective date.
Is a Realtor CMA the same as a real estate appraisal?
No. A Realtor comparative market analysis is commonly used to help establish a listing or marketing strategy. A professional appraisal is a formal valuation assignment developed for a specific client, intended use, property interest and effective date.
Why can my MPAC assessment be different from my home's current market value?
The effective dates and purposes can be different. For the 2026 property tax year, MPAC continues to use January 1, 2016 as the valuation date, while a current appraisal estimates value as of its stated current effective date.
Which property value does a mortgage lender use?
A lender may require an appraisal prepared specifically for the financing assignment and may have its own requirements for the appraiser, inspection and report. Homeowners should confirm the lender's appraisal instructions before ordering a report independently.
Should I get an appraisal before selling my home?
It depends on your situation. A Realtor CMA can be useful for listing strategy, while an independent pre-listing appraisal may be helpful when you want a property-specific opinion of market value before selling, particularly for a private sale, unusual property or situation where an independent valuation is important.
Request an Appraisal
Need an independent opinion of your property's market value? Cade Appraisals provides residential and commercial appraisal services throughout Southern Ontario for financing, estate and probate matters, divorce and matrimonial matters, taxation, litigation, private sales, family buyouts, retrospective valuations, construction and other property-related needs.
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