Key takeaways
- →An automated valuation model, a drive-by/exterior inspection, and a full appraisal are three different levels of review, and Canadian lenders don't apply them evenly — the same property can get a different method depending on the lender and the loan-to-value.
- →Insured, low-LTV deals are the most likely to clear on an automated valuation with no human appraiser involved; higher-LTV, uninsured, or unusual properties are the most likely to trigger a full appraisal.
- →Who orders and pays for the appraisal shifts by lender type — insurer-driven for many insured deals, lender-panel for most A-lenders, and often broker- or borrower-arranged for private and some alternative lenders.
- →A handful of factors — rural or acreage properties, condition concerns, a refinance with equity take-out, or a purchase price that looks aggressive — can trigger a full appraisal even on a file that would otherwise have cleared on an AVM.
A broker who assumes every file needs the same valuation step is either overpaying for appraisals the lender didn't need, or getting caught off guard when a lender comes back asking for one nobody budgeted time for. The method a lender actually uses — a full appraisal, a drive-by or exterior-only inspection, or an automated valuation model (AVM) — depends more on lender type and loan-to-value than on the property itself.
Here's what separates the three methods, who typically orders and pays for each across lender types, the situations that trigger a full appraisal even on a file that looked routine, and where the broker's own role sits in the process.
01 · What's the actual difference between a full appraisal, a drive-by, and an AVM?
A full appraisal is a credentialed appraiser physically inspecting the property inside and out and applying recognized valuation approaches under the Appraisal Institute of Canada's professional standards. A drive-by or exterior-only inspection is a lighter version of the same idea — an appraiser reviews the exterior and comparable sales without going inside, which is faster and cheaper but misses interior condition.
An AVM is different in kind, not just degree: a computer model estimating value from comparable sales data and property records, with no appraiser involved unless the model flags the file for a human review. Insurers use AVMs heavily on insured, lower-risk files specifically because they can return a value in minutes rather than days.
There's also a middle category worth knowing: an appraiser-assisted AVM, where the model does the heavy lifting but a human appraiser sets the parameters and reviews the output before it's finalized. It's faster than a full appraisal and more defensible than a pure algorithmic estimate, and it's increasingly the method a lender falls back to when a straight AVM can't find enough comparable sales to be confident in its own number.
Turnaround time is often the practical difference a broker feels first. An AVM can return in minutes, an appraiser-assisted AVM in hours, a drive-by within a day or two, and a full appraisal anywhere from a few days to over a week depending on the appraiser's schedule and access to the property — a gap worth building into a closing timeline from the moment a broker knows which method a given lender is likely to require.
02 · Who actually orders and pays for the appraisal on a given file?
| Lender type | Typical method | Who usually orders / pays |
|---|---|---|
| A-lender, insured, low LTV | AVM via the mortgage insurer, often instant | Insurer-driven; no cost passed to borrower in most cases |
| A-lender, uninsured or higher LTV | Full appraisal through a lender-approved appraisal management company | Lender orders; borrower typically pays the fee |
| B-lender / alternative | Full appraisal, usually from the lender's approved panel | Lender or broker orders; borrower pays |
| Private lender / MIC | Full appraisal, often required before a commitment is finalized | Broker or borrower arranges; borrower pays up front |
The article on appraisals in Canadian mortgage files covers the mechanics of ordering, reviewing, and disputing an appraisal in more depth; this piece is about how that step changes by lender type.
The pattern underneath the table is worth naming directly: the less risk an insurer or lender is carrying on a given file, the more comfortable it is relying on a model instead of a person. A low-LTV, insured deal represents the smallest slice of potential loss if the value turns out to be wrong, so an AVM's margin of error is tolerable; a private lender relying entirely on the property for its security has almost no room for that same margin, which is exactly why it insists on a human appraiser every time.
One less step to chase manually
Appraisal coordination handled as part of the file, not a side task.
Treadstone's fulfillment associates track which valuation method each lender needs and coordinate access so the appraisal step doesn't stall a closing.
03 · What can trigger a full appraisal even on a file that looked routine?
- →A rural, acreage, or otherwise non-standard property an AVM model doesn't have enough comparable data to price confidently
- →A refinance that includes equity take-out, since the lender's risk exposure changes even if the original purchase never needed a full appraisal
- →A purchase price that looks aggressive against recent comparable sales in the neighbourhood
- →Visible condition concerns flagged anywhere earlier in the file, from photos to a home inspection report
- →A jump in loan-to-value from what was originally underwritten — a lower down payment than planned, for example
None of these triggers are a sign something is wrong with the file — they're the lender or insurer being appropriately cautious about a specific variable an automated model isn't built to weigh. A broker who flags one of these factors proactively in the submission note, rather than waiting for the lender to catch it, keeps the appraisal step from feeling like a setback when it's really just a routine step happening slightly later than expected.
04 · What's the broker's actual role once an appraisal is ordered?
The appraisal step stalls more files on access than on value. Coordinating entry with the seller or tenant, and confirming the appraiser has the right contact on file, prevents more delays than anything about the valuation itself.
Beyond coordinating access, the broker's job is making sure the file's documented condition and price story match what the appraiser will find on site, so a low-value surprise doesn't derail a commitment. The appraisal-to-funding coordination checklist tracks that handoff end to end, and brokers using Treadstone's fulfillment associates get that coordination handled as part of the file, alongside the rest of the condition-clearing sequence.
Reviewing the appraisal once it comes back is its own small skill worth building. A value that lands lower than expected isn't automatically final — checking the comparable sales the appraiser actually used, and flagging a clearly outdated or poorly matched comparable, is a legitimate step, not a challenge to the appraiser's professional judgment, and it occasionally recovers a deal that looked dead on first read.
Frequently asked questions
This article is general information to help you scale — not a substitute for tailored advice on your specific business, licensing, or compliance obligations. All figures are illustrative examples for planning purposes; actual costs vary by province, market, and brokerage.