The client
A family self-building on a lot in Trois-Rivières, closing on the land first and financing the build separately through a construction-to-permanent mortgage. Their closing-cost budget, drafted early using a comparable finished-home purchase as a template, priced Quebec's transfer duty as if the whole $310,000 completed value were changing hands at closing.
Land purchase price at closing
$92,000
Eventual completed value
$310,000 (not transferred at closing)
Mortgage
$220,000 conventional
Welcome tax budgeted vs. assessed
$2,786 assumed → $606 actual
The problem
The template the closing-cost budget was built from came from a finished-home purchase file, where the buyer takes title to a completed house and the welcome tax is assessed against that finished value. A self-build doesn't work that way -- there is no completed house to transfer at closing, because it hasn't been built yet.
What the duty is actually based on
- ▸Quebec's transfer duty (droits de mutation) is assessed on the greatest of three figures: the price paid, the consideration stipulated in the deed, or the property's market value at the time of transfer
- ▸All three of those figures describe the immovable actually being transferred at that moment -- and at a land closing, before construction, that immovable is the land alone
- ▸The eventual completed home is not part of that transfer at all; it's built afterward, financed through the construction mortgage, and never itself changes hands as a sale subject to the duty
- ▸A self-build's land-only closing is therefore taxed on the land's own value, not on any assumption about what gets built on it later
The $310,000 figure the budget had used was the appraiser's projected value of the finished home -- a real number, just not the number the transfer duty attaches to. The land itself, at $92,000, was what the notary actually registered a transfer for.
The numbers
This is a conventional mortgage; the math below is the duty basis itself, computed both ways to show the budget's error.
| The welcome tax, computed two ways | Amount |
|---|---|
| Duty if assessed on the $310,000 completed value (the budget's assumption) | $2,786 |
| Duty actually assessed on the $92,000 land-only transfer | $606 |
| Amount the budget had over-reserved | $2,180 |
The mortgage
| Sizing and ratios | Figure |
|---|---|
| Minimum qualifying rate — greater of contract + 2% and 5.25% | 7.19% |
| Monthly payment at the qualifying rate | $1,567 |
| Monthly payment at the 5.19% contract rate | $1,303 |
| GDS (qualifying payment + $200 tax + $110 heat) ÷ income | 24.1% |
| TDS (housing + $140 other debt) ÷ income | 25.9% |
The solution
The broker corrected the closing-cost line before the land closing, rather than letting the family carry an over-reserved budget line into the build.
The $2,180 difference wasn't a shortfall to solve -- it freed up cash the family redirected toward the finishing-trades contingency, which a self-build budget almost always underprices somewhere.
This case does not involve any municipal surtax above $500,000 -- that only applies where the transfer itself exceeds that threshold, which a $92,000 land closing does not.
The outcome
The mortgage funded at $220,000, qualifying payment $1,567, GDS 24.1% and TDS 25.9%. The notary assessed the welcome tax at $606 on the land-only transfer, $2,180 less than the closing-cost budget had reserved -- corrected before closing, not discovered as a pleasant surprise on the statement of adjustments.
What to take from this file
- 01Quebec's welcome tax is assessed on what's actually transferred, not on what gets built afterward. A self-build's land-only closing is taxed on the land's value -- the greatest of price paid, consideration stipulated, or market value at that moment.
- 02A finished-home closing-cost template doesn't transfer cleanly to a self-build. Rebuild the transfer-duty line from the self-build's own closing structure rather than reusing a comparable purchase file's assumptions.
- 03An over-reserved budget line is still a budgeting error worth catching early. Correcting it before closing let the family redirect real cash to where the build actually needed it.
- 04The eventual completed value only matters later, for the mortgage's own take-out sizing -- not for a transfer duty that attaches to the land closing that already happened.
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%.
- ▸Gouvernement du Québec — Droits sur les mutations immobilières — Quebec's transfer duties ('welcome tax') — 2026 indexed brackets.
- ▸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:
- ▸5.19% contract rate — rates move daily; not a quote.
- ▸$200 property tax / $110 heat / $140 other debt — illustrative carrying costs for this file.
- ▸$92,000 land price / $310,000 eventual completed value — illustrative deal figures for this file, not an appraisal or a published average.
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.