Common Multi-Family Underwriting Mistakes in Edmonton

 

Edmonton has become one of the most talked-about multi-family markets in Canada. Cap rates sit above Toronto and Vancouver, CMHC financing can stretch amortizations out for decades, and the city keeps adding people. That combination draws in a lot of first-time apartment buyers, and a lot of them underwrite deals the way they'd underwrite a single rental house.

That's where problems start. A walk-up with 12 or 20 units behaves differently from a duplex. Heat is often on the owner. Capital items are bigger and lumpier. And the market in 2026 isn't the market of 2023: record construction has pushed vacancy up and given tenants more choice. Small underwriting errors that wouldn't matter on a house can swing an apartment building's value by hundreds of thousands of dollars.

Below are the multifamily underwriting mistakes we see most often in Edmonton, what they look like in a real file, and how to fix each one before you sign. If you're newer to the asset class, start with our commercial multi-family investing guide.

 

 

Mistake 1: Underwriting Yesterday's Vacancy

Two or three years ago, Edmonton apartments were filling fast and a 2% vacancy assumption felt safe. That's changed. The CMHC 2025 Rental Market Report shows Edmonton's purpose-built vacancy rose to 3.8%, with turnover near 29%, as rental completions outpaced demand. The Edmonton region also recorded 21,337 housing starts in 2025, a record, so more competition is still coming.

The fix: underwrite 4% to 5% vacancy for older stock, and add a line for concessions. When new buildings offer a free month, older buildings nearby feel it.

Mistake 2: Assuming Rent Growth Will Bail Out the Deal

Alberta doesn't cap how much rent can rise, which tempts buyers to project aggressive increases. But rent can only be raised once every 365 days, month-to-month tenants need 3 full months' notice under the province's rules for landlords during a tenancy, and in practice, pushing rents hard in a softer market just increases turnover.

The fix: underwrite year one on in-place rents. If the deal only works with 5% annual rent growth, it's a speculation, not an investment.

Mistake 3: Missing Landlord-Paid Utilities

Many Edmonton walk-ups built in the 1960s and 1970s run on a central boiler with heat and water included in rent. Winter here is long, and a building's gas bill in January can look nothing like July. Buyers who pull utility numbers from a pro forma, or from a mild year, get burned.

The fix: request 24 months of actual utility bills, not a summary. Look at the full heating season and ask whether any units are separately metered.

Mistake 4: Ignoring Capital Expenditures

A 50-year-old building has a list of big-ticket items waiting: flat roofs, boilers, windows, balconies, parkade membranes, and electrical service. These don't show up in the T12 until they fail, and then they show up all at once.

Common Edmonton capex item	Why it matters	How to underwrite it
Boiler and heating plant	Failure in winter is an emergency	Age, service records, replacement quote
Flat or low-slope roof	Leaks damage units below	Roof inspection and remaining life estimate
Windows and doors	Heat loss and tenant comfort	Condition review, phased replacement budget
Balconies and railings	Safety and liability	Structural review where concrete is spalling
Parkade membrane	Water intrusion and rebar corrosion	Engineer review on buildings with parkades
Electrical service	Insurance and capacity for upgrades	Panel age, aluminum wiring check

 

The fix: get a building condition assessment during your due diligence period, and carry an annual reserve per unit in your underwriting even if the seller never did.

 

Mistake 5: Forgetting the Property Tax Reset

Alberta assesses property at market value, and sale prices feed into future assessments. A building that's been owned for 20 years may be assessed well below what you're paying. Once your purchase and others like it show up in the data, the assessment can climb, and so can the tax bill.

The fix: review the current assessment, compare it to your price, and model a higher future tax bill if the gap is large.

Mistake 6: Using the Wrong Cap Rate Comparables

Edmonton multi-family has recently traded at roughly 4.5% to 5.5% cap rates, but that range hides wide differences. A new concrete building near an LRT station and a 1968 walk-up with original windows are not comparable. Applying a Class A cap rate to Class C income overvalues the building instantly.

The fix: compare against buildings of similar age, construction, location, and unit mix. A third-party commercial appraisal will be required by your lender anyway, so understand how appraisers will view your comparables before you set your price.

Mistake 7: Leaving Out Management and Payroll

Small-building owners often self-manage and handle repairs themselves, so their statements show no management fee and a tiny maintenance line. You're buying the building, not the seller's free labour.

The fix: include a management fee and a realistic caretaker or on-site cost, even if you plan to manage it yourself for now.

Mistake 8: Sizing Debt Too Tightly

CMHC-insured financing is powerful, and our guide to the CMHC MLI Select program explains how it works. But long amortizations and high leverage can hide thin coverage. MLI Select requires a minimum debt coverage ratio of 1.10 for standard rentals, and conventional lenders often want more. A deal that just clears 1.10 today can slip below it after one bad winter or a rate reset at renewal.

Watch for negative leverage too. If your cap rate is 5.0% and your borrowing cost is close to that, extra debt doesn't improve your return. It only adds risk.

The fix: stress-test the deal at a rate at least 1% higher than today and at vacancy a few points worse. If coverage falls below lender minimums, you need more equity or a lower price.

Mistake 9: Counting Units That Aren't Legal

Some older buildings and converted houses include basement or attic units that were never permitted. Their rent looks real on the rent roll, but lenders and insurers may not recognize them, and the city could require changes. Edmonton's newer zoning rules have made legal density easier to add in many areas, but that doesn't make existing unpermitted units legal.

The fix: confirm the legal unit count with the city before you remove conditions, and underwrite only legal units.

A Stress-Test Checklist to Avoid Multifamily Underwriting Mistakes

•        Vacancy at 5% or higher

•        Rents held flat for year one

•        Utilities from 24 months of actual bills

•        Insurance from a current written quote

•        Management and caretaker included

•        Capital reserve per unit included

•        Property taxes modelled at a reassessed value

•        Interest rate stressed by 1% or more

•        Debt coverage still above lender minimums after all of the above

 

 

Frequently Asked Questions

 

Avoid Multifamily Underwriting Mistakes in Today's Market

Edmonton's fundamentals are strong, but strong fundamentals don't protect you from a bad purchase price. The investors who do well here underwrite conservatively, verify everything, and let the upside be a bonus rather than the plan.

If you're evaluating a building, we can help you pull rent comparables, review the T12, and pressure-test the deal against the checklist above. Our guide to finding value-add multi-family properties is a good next read.