The client
An investor buying a four-bedroom house near Corner Brook's Grenfell Campus had priced the deal room by room: four signed roommate agreements at $650 each, for a projected $2,600 a month. That is a real and common way to run a student rental — it is not, in most lenders' underwriting, a real way to qualify a mortgage.
Personal income
$84,000/year
$7,000/month for the ratio math
Own housing
$1,950/month
The investor's own principal-residence carrying cost
Other debt
$250/month
Vehicle loan
Purchase
$340,000 four-bedroom, Corner Brook
20% down ($68,000); uninsured investment property
Pro-forma rent
$2,600/month, per room
Four signed roommate agreements at $650 each
The appraiser's opinion of value came back tied to a single-family market rent of $1,900/month — what the same house would rent for to one household, not four separate roommates paying individually.
The problem
Per-room income is real revenue, but most lenders will not qualify a file on it — the rental income offset method a lender applies is a matter of published policy, not regulation, and almost none of those policies credit a room-by-room roster directly. The appraisal on this file assigned a single-family market rent of $1,900/month rather than the $2,600 the client had pro-formaed from four separate leases. That $700-a-month gap never touched the file's qualifying math.
The client's first instinct was to argue the appraisal was wrong. It was not wrong — it was conservative by design. A market-rent opinion answers what the whole house would rent for as one tenancy, not what four separate tenancy agreements might generate, because room-by-room arrangements carry vacancy, turnover and enforcement risk a single lease does not. Some lenders will look at a signed roommate roster and credit more; most price to the number every lender would accept.
The numbers
The subject property's own carrying costs are qualified at the minimum qualifying rate, then offset against the appraised market rent — not the per-room pro-forma — before any shortfall lands in the investor's personal TDS.
| Subject property — qualifying costs | Amount |
|---|---|
| Mortgage (80% LTV, $272,000) at the qualifying rate of 7.09% | $1,920 |
| Property tax | $220 |
| Heat (lender-standard estimate) | $150 |
| Total qualifying carrying cost | $2,290 |
At a 5.09% contract rate (illustrative, not a quote), the minimum qualifying rate is 7.09% — the greater of contract plus 2% or 5.25%. The subject property's carrying cost is qualified at that rate before any rent is credited.
Offsetting the appraised rent, not the pro-forma rent
| Rental treatment | Actual (appraised rent) | Hypothetical (pro-forma rent) |
|---|---|---|
| Rent used | $1,900 | $2,600 |
| Lender's offset (80%) | $1,520 | $2,080 |
| Subject net liability ($2,290 minus the credit) | $770 | $210 |
| Qualifying-income TDS | 42.4% ✓ | 34.4% (never used) |
The gap between the two columns — 8 points of TDS — is exactly the difference between what the client assumed the file needed and what it actually needed. Both numbers pass; only one of them is the number underwriting will see.
The solution
A Newfoundland and Labrador-licensed mortgage broker reset the client's expectations before the file ever reached a lender: price the deal on the appraised market rent, treat the per-room total as upside, and choose a lender whose published policy offsets that conservative figure rather than refusing rental income on a student property outright.
That cover note mattered more than it might seem: without it, an underwriter unfamiliar with student-rental structures could easily read four separate roommate agreements as four unrelated tenants with independent enforcement risk, rather than one coherent rental arrangement the appraiser had already priced conservatively.
Because closing costs stay qualitative in this province — Newfoundland and Labrador has no verified transfer-tax figure to publish here — the client was told to budget legal fees and adjustments as a range from the lawyer's retainer letter rather than a computed number, and to confirm the exact figure before removing financing conditions.
The outcome
Approved and funded on the appraised market rent, at 42.4% TDS. Six points of room remained if the appraisal had come in even more conservatively, which is exactly the margin the broker priced the file to protect. The per-room income the client had spent weeks pro-forma'ing turned out to matter for the investment's actual cash flow — just not for the mortgage that financed it.
The client kept the per-room leases in place after closing, and the property now cash-flows well above what the appraised-rent qualifying number alone would suggest. That gap between qualifying income and actual income is normal on a per-room rental, and worth explaining to a client up front so a conservative approval does not read as a disappointing one.
What to take from this file
- 01Price a student rental deal on the appraised market rent, not the per-room pro-forma. Treat room-by-room income as upside for the investment, not as qualifying income for the mortgage.
- 02The rental offset percentage is lender policy, not regulation. Confirm which lenders on your shelf will even look at a per-room roster before promising a client a number.
- 03A file that clears comfortably on the conservative number has real margin if the appraisal comes in lower than expected. Qualifying tight on an optimistic number leaves no room to negotiate.
- 04Newfoundland and Labrador closing costs stay qualitative. With no verified provincial transfer-tax figure to cite, budget legal fees as a range from the retainer letter, not a computed dollar amount.
Sources
Every regulatory figure in this file traces to one of these primary sources. Client details and anything that varies by lender are illustrative, as flagged below.
- ▸OSFI — Minimum qualifying rate for uninsured mortgages — the minimum qualifying rate — greater of contract rate + 2% or 5.25%.
- ▸Provincial/territorial mortgage-broker legislation fetched directly (bclaws.gov.bc.ca, legisquebec.gouv.qc.ca, fcaa.gov.sk.ca, web2.gov.mb.ca, nslegislature.ca, assembly.nl.ca) plus FCNB's own site for NB and CanLII's index for PE — see notes for per-province method — provincial mortgage regulators and licence titles.
Illustrative in this file — lender-specific, not rules:
- ▸5.09% contract rate — rates move daily; not a quote.
- ▸80% offset of appraised rent — lender policy, not regulation.
- ▸$650-per-room pro-forma — the client's own projection, not a lender figure.
Authority & provenance
How this case file was built
We publish the origin, the verification method and the reviewer for every case file, so you can judge how far to trust it before you rely on it with a client.
Where it comes from
Derived from files handled by Treadstone’s fulfillment desk and from scenarios contributed by partner brokerages. Names, employers, exact amounts and dates are changed so no client or file is identifiable.
Provenance: Composite — a pattern seen repeatedly on fulfilled files, not a single transaction.
What is verified
Every regulatory figure traces to a primary source listed above and was checked against it on the date shown. The arithmetic is recomputed by machine on every rebuild.
Anything that varies by lender is labelled illustrative rather than stated as a rule.
Who reviewed it
Reviewed for Canadian regulatory accuracy before publication, and re-checked whenever a cited rule changes.
Reviewed by: Nicholas Parson, Treadstone Associates — reviews every case file before publication.
This case file is professional reference material for licensed mortgage professionals. It is not advice to a borrower, and it is not a lender commitment. Insurer rules, qualifying rates and provincial taxes change — confirm the current position with the insurer, regulator or lender before you rely on any figure here in a live file.