A Realtor Letter vs. A Certified Appraisal: What Estate Lawyers Need to Explain to Clients
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When administering an estate, one of the most common misconceptions executors and beneficiaries have is this:
“Why pay for a certified appraisal when a Realtor can just provide a letter of opinion?”
At first glance, the two may appear similar — both provide an estimated value for a property. However, from a legal, evidentiary, and risk-management standpoint, they are fundamentally different documents serving very different purposes.
For estate lawyers, explaining this distinction early can help prevent disputes, CRA issues, delays in probate, and future liability concerns.
Why This Question Comes Up So Often
In many estates, beneficiaries are looking to minimize costs and speed up administration. As a result, some clients may assume that a Realtor’s opinion of value is “good enough” for probate, tax reporting, or estate equalization.
Unfortunately, this misunderstanding can create significant problems later — especially if the property value is challenged by:
The Canada Revenue Agency (CRA)
A beneficiary
Another lawyer
The court
An accountant
A future purchaser or lender
This is where estate lawyers play an important advisory role.
What Is a Realtor Letter of Opinion?
A Realtor letter — often referred to as a Comparative Market Analysis (CMA) or opinion of value — is generally prepared for listing or marketing purposes.
It is not a formal appraisal report.
While Realtors provide valuable market insight, these letters are typically:
Intended to help determine a listing price
Not prepared under professional appraisal standards
Often unsupported by detailed adjustment analysis
Not designed for legal scrutiny, litigation, or CRA review
Most importantly, a Realtor letter is generally not considered a defensible valuation document for estate-related legal matters.
What Makes a Certified Appraisal Different?
A certified residential appraisal prepared by an AIC-designated appraiser is a formal valuation report developed under the Canadian Uniform Standards of Professional Appraisal Practice (CUSPAP).
Unlike a simple opinion letter, a certified appraisal includes:
Independent market analysis
Verified comparable sales
Adjustment analysis
Highest and best use considerations
Detailed reasoning and reconciliation
Market condition analysis
Supporting documentation and methodology
Professional liability accountability
The result is a valuation that can withstand scrutiny from courts, accountants, lenders, and the CRA.
For estate matters, this distinction is critical.
You can also read our related article:
Why Estate Lawyers Should Be Careful
1. Probate and Estate Administration Tax
If a property value is later challenged, an unsupported estimate can create issues with estate filings and tax calculations.
A certified appraisal helps demonstrate that the executor acted prudently and relied on a professional, independent valuation.
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2. Beneficiary Disputes
Estate disputes often begin when one beneficiary believes a property was undervalued or overvalued.
This becomes especially problematic when:
One beneficiary buys out another
A property is transferred instead of sold
Family members disagree on timing or market conditions
A certified appraisal provides a neutral and defensible opinion supported by market evidence — not merely an estimate.
3. CRA Scrutiny
Retrospective valuations for:
date-of-death values,
principal residence changes,
capital gains calculations, or
estate freezes
require credible support.
In many situations, a Realtor letter simply does not contain the level of analysis necessary to support a value if questioned by CRA.
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4. Litigation Risk
If the matter later proceeds to mediation, arbitration, or court, a formal appraisal prepared by a qualified appraiser carries substantially more weight than a general opinion letter.
Estate lawyers often discover that saving a few hundred dollars upfront can create much larger costs later if the valuation becomes disputed.
For family-law-related disputes, see:
When a Realtor Letter May Still Be Appropriate
There are situations where a Realtor’s market opinion can still be useful, including:
Preliminary planning discussions
Listing strategy
Informal family discussions
General market guidance
However, when the value is being relied upon for:
probate,
tax reporting,
estate equalization,
litigation,
executor protection, or
legal documentation,
a certified appraisal is typically the more appropriate and defensible option.
Helping Clients Understand the Difference
Many executors are not trying to avoid proper process — they simply do not understand the difference between:
a marketing estimate, and
a formal valuation prepared under professional appraisal standards.
Estate lawyers who explain this distinction early often avoid:
future disputes,
valuation challenges,
delays,
and unnecessary legal exposure for executors.
Final Thoughts
In estate matters, the question is rarely:
“What number can someone provide?”
The real question is:
“What valuation can actually be defended if challenged later?”
That distinction is what separates a Realtor letter from a certified appraisal.





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