Your neighbours may be assessed lower than you.
Property tax follows your assessed value. Comparoll compares your assessment with similar homes in your community, so you can see in seconds whether yours stands out.
Free check. No account needed. Your roll number is on your assessment notice.
We've helped homeowners save
in property tax, and counting.
Know where you stand before you call the City.
An assessment is the City's estimate, produced for hundreds of thousands of properties at once. Estimates can miss. Comparoll gives you the evidence to tell.
See how you compare in seconds
Enter a roll number or address and get the lowest and the median assessed value among similar homes in your community.
Bring comparables, not a complaint
A request to review an assessment carries more weight when it lists specific similar properties assessed lower. The report gives you that list.
Pay tax on a fair value
If the City lowers your assessed value, the tax calculated from it comes down with it. If your assessment is already in line, you will know that too.
Every match is explained
You see the rule used to pick each comparable: same community, same property type, similar lot size and similar year built. No black box.
Three steps from roll number to evidence.
Enter your property
Type the roll number from your assessment notice, or your street address. We look it up on the City of Calgary's public assessment roll.
We find similar homes
Comparoll searches your community for the same type of property with a similar lot size and year built, then keeps the ones assessed lower than yours.
You decide what to do
The free check shows the lowest and median comparable. If the gap is worth pursuing, buy the detailed report and take it to the City.
Start free. Pay only if the numbers justify it.
The free check tells you whether there is a case. The report gives you the properties behind it.
- Your current assessed value
- Lowest comparable assessed value
- Median comparable assessed value
- How far above the median you are
- 4 to 10 comparable properties, each with roll number and address
- Year built, lot size, zoning and assessed value for each
- Difference from your assessment, in dollars and percent
- Distance from your property
- Summary and the matching rule used, as a PDF
What to know before you rely on it.
Where does the data come from?
From the City of Calgary's open data portal, which publishes the current assessment roll. Comparoll is independent and is not affiliated with the City.
What makes a property "comparable"?
Same community, same property type, a similar lot size and a similar year built. The search starts strict and widens only as far as needed to find at least four.
What does it not compare?
Building size, bedrooms, bathrooms, basement finish, garage, condition and renovations. The public roll does not include them, so check those details for each comparable before you rely on it.
Does a lower comparable mean my assessment is wrong?
No. It means the question is worth asking. A neighbour may be assessed lower because the house is smaller or older inside. The report is evidence for a review, and the City decides the outcome.
Will my taxes go down?
Only if the City agrees to lower your assessed value. Comparoll cannot promise a reduction and does not file anything with the City on your behalf.
Which properties are covered?
Properties on the City of Calgary assessment roll. Matching works best for detached houses; unusual properties may return few or no comparables.