The client
A self-build outside Port Alberni was approved on a $600,000 construction mortgage with a committed 12-month interim term -- separate and distinct from the insured mortgage the file would convert into once the house was finished.
Approved interim facility
$600,000
12-month committed term
Balance drawn at month 12
$480,000
80% of the facility drawn
Original interim rate
6.45%
Set at commitment
Household income
$11,200/month
The problem
A construction mortgage is itself a term product, priced and committed for a fixed period -- commonly 12 months -- distinct from the eventual insured or conventional mortgage the file converts into once the build is complete. Everyone on this file had planned around the eventual takeout's own rate risk. Nobody had flagged that the interim facility funding the build had a maturity date of its own.
What actually happened at month 12
- ▸The build was roughly 80% complete, with $480,000 of the $600,000 facility drawn against invoiced progress
- ▸The interim facility's own 12-month term matured before the final draw, requiring a formal renewal -- not simply a continuation -- of the interim mortgage itself
- ▸The lender's current interim-construction pricing had moved since commitment, so the renewal carried a new rate rather than the original 6.45%
A three-month gap remained between the interim term's maturity and the completed home's own conversion to a permanent, insured mortgage -- and that gap had to be financed on the interim facility's renewed terms, not the takeout's.
The numbers
The interim facility's own renewal changed the interest-only carrying cost on the drawn balance for the build's final three months -- the eventual insured takeout math was unaffected.
| Interim carrying cost, before and after renewal | Amount |
|---|---|
| Interest-only cost at the original 6.45% interim rate | $2,580/mo |
| Interest-only cost at the 7.15% renewal rate | $2,860/mo |
| Increase for the build's final three months | $280/mo |
| Interim carrying cost as a share of income | Figure |
|---|---|
| Before renewal ($2,580 ÷ $11,200 income) | 23.0% |
| After renewal ($2,860 ÷ $11,200 income) | 25.5% |
Both figures left comfortable room on the household's own income -- the interim renewal was affordable once identified. What nearly derailed the file was that nobody had budgeted for a second renewal event, separate from the eventual insured takeout, inside the same build.
The solution
A submortgage broker licensed under BC's Mortgage Services Act treated the interim facility's own maturity date as a distinct milestone to track from day one, not an extension of the eventual takeout's rate-hold clock.
First, confirmed the interim facility's committed term length against the builder's own construction schedule at commitment, flagging that a 12-month term against a build the builder estimated at 12 to 14 months left effectively no buffer.
Second, when the build reached month 10 still short of completion, approached the lender proactively about the interim renewal rather than waiting for the term to lapse and risk a funding gap mid-construction.
Third, kept the interim renewal entirely separate from the insured takeout conversation, confirming with the lender that the renewed interim rate had no bearing on the takeout's own pricing once the home was complete.
The outcome
The interim facility renewed for the final three months of the build at 7.15%, carrying an extra $280 a month the household absorbed comfortably, and the completed home converted to its insured takeout on schedule once the build finished.
The interim renewal's rate is a lender-specific, point-in-time figure and is not connected to the household's eventual takeout pricing; both carrying-cost figures shown are well within the household's own income.
What to take from this file
- 01A construction mortgage's interim facility has its own term and maturity date, separate from the eventual takeout. Never assume the facility simply continues funding until the house is done.
- 02Compare the interim term's length against the builder's own construction schedule at commitment, with buffer. A 12-month term against a 12-to-14-month build leaves no room for the ordinary slippage every build has.
- 03Approach the lender proactively once the build is running late, rather than waiting for the interim term to lapse. A renewal arranged ahead of maturity is routine; one arranged after a funding gap is not.
- 04An interim renewal's rate has no bearing on the eventual insured takeout's own pricing. Keep the two conversations, and the two commitments, entirely separate on the file.
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.
- ▸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:
- ▸the 6.45% and 7.15% interim rates — interim/construction pricing is lender-specific and moves with the lender's own cost of funds; not a quote.
- ▸the 12-month interim term — term length is a product choice each construction lender sets independently.
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.