Alberta property assessment: how the value is set, and how to appeal it

An Alberta property assessment is your municipality’s estimate of what your property would have sold for on 1 July of the previous year, in the physical condition it was in on 31 December. It is not a bill and it is not an appraisal. It is the number that fixes your share of the municipal and education tax burden. You get 60 days from the notice date to complain, the grounds are set out in statute, and on most notices the class line matters more than the value line.

What is an Alberta property assessment?

It is a value, not a bill, and it is already a year old on the day it reaches you. In the province’s own words it is the mechanism that distributes the tax burden among property owners in a municipality, which is why the number matters even in a year when your own bill barely moves. Municipal assessors prepare assessments for every property except designated industrial property, which the provincial assessor handles and where complaints go to the Land and Property Rights Tribunal rather than a municipal board. The standard is market value: section 1(1)(n) of the Municipal Government Act defines it as the amount a property "might be expected to realize if it is sold on the open market by a willing seller to a willing buyer."

The notice arrives on its own, weeks or months before the tax bill, and that gap is deliberate. It is the only window in which the value can be argued.

How is an Alberta property assessment calculated?

By mass appraisal, not by a visit to your house. Section 5 of the Matters Relating to Assessment and Taxation Regulation requires the assessment to be prepared using mass appraisal, to estimate the fee simple estate, and to reflect typical market conditions for similar properties. The assessor models groups of properties from sales data and statistical testing, then applies the model to yours.

Two dates do the damage, and almost nobody reads them off the notice.

Valuation date

1 July

Of the assessment year, which the regulation defines as the year before the tax year (AR 203/2017 s.6)

Condition date

31 December

The characteristics and physical condition of the property on that date (MGA s.289(2))

Complaint deadline

60 days

After the notice of assessment date the assessor sets under MGA s.308.1, which is often later than the mailing day (s.284(4)). The date is printed on the notice

Residential filing fee

Up to $50

Three or fewer dwellings, and farm land (AR 201/2017 Schedule 2)

So a 2026 assessment describes the market as it stood on 1 July 2025, on a house as it stood on 31 December 2025. A kitchen finished in February 2026 shows up on the 2027 notice, not this one, and today’s listing prices are not evidence of anything. Accuracy is tested statistically: Rocky View County states the median assessment ratio for residential property must fall between 95 and 105 per cent of the market value indicator.

How to look up property assessments in Alberta

Through your own municipality. There is no provincial database of Alberta property assessments, and the tool has a different name in every town.

Two statutory rights beat every portal. Section 299 lets an assessed person ask the municipality to see the information showing how the assessor prepared the assessment of their own property. Section 300 lets you request a summary of the most recent assessment of any property in the municipality that you do not own, and that summary must include the parcel description and size, the age and size of the improvements, their key attributes and the assessed value. That is how you compare yourself with three neighbours on paper rather than by guesswork.

Why your assessment went up but your tax bill may not

Because an assessment increase raises no revenue by itself. Council decides how much it needs, then divides that across the assessment base. If every property in your class rises 12 per cent, the rate falls and the bills barely move. You pay more only when your value rises faster than the average for your class, and less when it rises slower. Canmore puts it plainly: changes in assessment "alone do not increase municipal revenue."

What does raise the bill is a rate decision, and you cannot complain about one. Section 460(8) of the Act says there is no right to make a complaint about any tax rate. Edmonton council approved a 6.9 per cent property tax increase for 2026, roughly $816 for every $100,000 of assessed value and about $53 more than 2025. That is a budget argument for the council chamber, not a ground for the assessment review board.

Seniors are not exempt from the rate decision either, which surprises people. Alberta’s Seniors Property Tax Deferral Program lets an owner aged 65 or older with at least 25 per cent equity, resident in the province for three months, defer residential property tax through a low-interest home equity loan, currently at 4.45 per cent simple interest. Note the condition that ties it back to the class line: the home must be the owner’s primary residence, so a Canmore property carrying the non-primary sub-class and its $10,002 bill cannot be deferred at all, while the same home at the primary-residence rate defers $5,479 a year. Deferral postpones the bill, it does not cancel it, and the balance falls due when the home is sold or stops being the owner’s primary residence.

What the assessment classes mean, and why the class matters more than the value

Section 297(1) assigns one or more of four classes: class 1 residential, class 2 non-residential, class 3 farm land, class 4 machinery and equipment. Councils may split class 1 into sub-classes by bylaw, and class 2 into vacant, small business and other non-residential. The sub-class line is where the money hides.

Alberta constrains one of those sub-classes directly. Section 297(2.01) bars an assessor from assigning a non-primary-residence sub-class to residential property wholly or partly owned by an individual who resides in Alberta, and section 297(2.02) defines residing in Alberta as at least 183 days in the current or previous calendar year with no intention of taking up residence elsewhere. That single subsection is why the Canmore Livability Tax now lands almost entirely on owners from outside the province.

Here is what the class line is worth in Canmore in 2026, on a $1.2 million assessment:

Now do the arithmetic that no government page will do for you. Winning a 10 per cent reduction on that $1.2 million non-primary assessment, a genuinely good result at a hearing, saves about $1,000 a year. Correcting a sub-class that should have been primary residence saves $4,523 a year, every year, with no hearing at all. Model both against your own number in the Canmore property tax calculator, and read how the four 2026 rates are built before you decide which fight is worth having.

The same logic runs the other way for nightly rentals. If the notice carries a tourist home code the property is taxed at the tourist home rate, and since 11 March 2025 Tourist Home is no longer a permitted use in Canmore’s established residential districts. It remains permitted only in Silvertip’s STR-1 and STR-2 districts and on the Three Sisters Village parcels identified in that Area Structure Plan. Existing tourist homes keep their status, and conversion to residential is one-way and fee-free to 31 December 2026. Check the code against what the zoning actually permits rather than assuming one follows the other.

How to appeal an Alberta property assessment: deadlines, fees and boards

1. 1Ask the assessor first, and ask in writingFree, and it settles most disputes. Use section 299 to request the information showing how your assessment was prepared, and section 300 for summaries of comparable properties.
2. 2File before the complaint deadlineSixty days after the notice of assessment date, which the assessor sets under section 308.1 and which can fall later than the day the envelope was mailed. Complaints filed late, or without the fee, are invalid. There is no extension for a holiday or a forwarded envelope.
3. 3Pay the right feeCapped at $50 for residential property with three or fewer dwellings and farm land, $650 for four or more dwellings and non-residential, $30 for other tax notices. Councils may charge less, but the large ones do not: Edmonton charges the full $50 for a home of three or fewer dwellings under Schedule B of Bylaw 18308. The free step is the review period before a complaint is filed, when assessment staff answer questions at no charge.
4. 4State the complaint preciselySection 460(9) requires you to identify what information is incorrect, explain why, give the correct information, and name the assessed value you are requesting. Vague forms lose before the hearing starts.
5. 5Know which board hears youA local assessment review board takes residential property with three or fewer dwelling units and farm land. Everything else goes to a composite board with a presiding officer appointed by the Land and Property Rights Tribunal.
6. 6Meet the disclosure clockBefore a local board you disclose at least 21 days before the hearing, the assessor at least 7, and your rebuttal at least 3. The board must not hear an issue absent from the form or evidence not disclosed on time.
7. 7Get the fee backSection 481(2) requires a refund if the board decides in your favour, and the complaints regulation refunds it if you withdraw because the assessor agreed to correct the matter. Judicial review at the Court of King’s Bench is the only step beyond the board.

Pay the tax bill while the complaint is pending. A reduction is credited afterwards; an unpaid balance still attracts penalties.

What evidence actually wins an assessment complaint

Facts, not indignation. The statute lists what you can complain about in an Alberta property assessment: the description of the property, the name and mailing address, the assessment itself, the assessment class, the sub-class, the type of property, the type of improvement, school support, whether the property is assessable and whether it is exempt. Four lines of attack account for most residential wins.

• Comparable sales near the valuation date. Sales within a few months either side of 1 July of the prior year, adjusted for size, age and location. Current asking prices prove nothing. Recent Canmore sold prices give you the shape of the market to argue from.
• Recorded floor area. Pull the section 300 summaries for the closest comparables and check the assessor’s square footage against reality. An over-recorded 300 square feet moves the value model directly.
• Improvements that are not there. A finished basement, a second bathroom, a garage or a deck on the record and not in the house. This is a correction, not an opinion, and it is the fastest fix.
• Attributes the model got wrong. View, exposure, storey, and in a condominium the unit factor. A shady-side unit modelled as a sunny-side one is an arguable difference in the Bow Valley, where the aspect genuinely changes what a unit is worth.

Assessment value is not market value: what a Canmore sale price says

The standard is market value, but the machinery guarantees a gap. Mass appraisal estimates the fee simple estate under typical market conditions at one date shared by every property in the municipality, while a sale price is one negotiation between two people on one day. In a rising market the assessment is behind by construction. Canmore’s residential assessments rose 12.5 per cent for 2026 and still describe July 2025, against 2025 average sold prices of $814,000 for an apartment condo and $2.15 million for a detached home.

So use the seller’s notice during your condition period for three things and no others. Read the class and code to see how the property is actually taxed. Compare the recorded floor area with the marketed square footage, because a mismatch is a question worth asking before you pay for an inspection. Feed the assessed value into a tax estimate, but treat the class printed on it as history rather than as a forecast of your own bill. A seller’s notice reading primary residence describes the seller’s declaration, not yours: the property carries that classification for the rest of the calendar year, apportionment between you and the seller is settled in the purchase agreement, and from the following year the sub-class turns on your own 31 December declaration. For what the property is worth today, start from a current home valuation built on recent sales instead.

What this means if you are buying or owning in Canmore

Read your Alberta property assessment from the class line down, not the value line down. For most owners the sub-class is worth several times what a successful argument about the Alberta property assessment value itself would be, and correcting it needs a phone call rather than a hearing. Put two dates in the calendar: the notice of assessment date, which starts the 60-day clock, and 31 December, which protects both your rate and your right to complain. If you are buying from outside Alberta, work out the non-primary bill before you write the offer, because it is not a rounding error. Our guide for out-of-town buyers and the Canmore assessment notice walkthrough cover the local mechanics in full.