Verified July 2026 · By Oleg Kachko · Reviewed for accuracy against primary state and county sources
Cass County property tax costs the typical homeowner about $3,564 a year, on a median home value of $298,000 – an effective rate of about 1.11%. That is below the national average annual bill of $4,271. This page shows you where that number comes from, who actually sets it, the deadline to challenge it, and the exemptions you may be leaving on the table.
Cass County property tax at a Glance
- Effective property tax rate: 1.11%
- Median annual bill: $3,564
- Median home value: $298,000
- Who assesses your home: Cass County Assessor
- Appeal deadline: County board sits the first 10 days of June (local boards meet in April)
On this page
Cass County property tax: the real numbers
Property tax is the most local tax there is. Two homes of the same value in different counties – sometimes in different towns of the same county – can carry very different bills, because the rate is the sum of every overlapping district that taxes you: the county, the town or city, the school district, and often fire, library or water districts on top. So the cass county property tax figure below is an average across the whole county – your own bill depends on which districts you sit inside.
| Figure | Cass County | National |
|---|---|---|
| Median annual property tax bill | $3,564 | $4,271 |
| Effective property tax rate | 1.11% | about 0.90% |
| Median home value | $298,000 | – |
Source: U.S. Census Bureau American Community Survey (5-year), the same dataset the Tax Foundation uses. The effective rate is total real-estate taxes paid divided by total owner-occupied home value – so it reflects what people actually pay, not the headline millage rate.
Who actually sets your cass county property tax value
Your assessed value is set by Cass County Assessor. That office does not set your tax rate – the county board, your city, and your school district each set their own, and your bill is the sum. So the assessor can only be argued with about one thing: what your home is worth. That is exactly what an appeal is.
How often your cass county property tax value is reassessed:
Local assessors and the county director of tax equalization value property each year (assessment date about February 1). Homes are assessed at 50% of true value, then a 9% residential rate is applied to get taxable value.
How to appeal your cass county property tax assessment
⚠ The deadline — miss it and you usually wait a full year
County board sits the first 10 days of June (local boards meet in April)
Start by talking to your local assessor, then appeal to the local Board of Equalization (townships/cities meet in April), the County Board of Equalization (first 10 days of June), and the State Board of Equalization (August). Confirm your local board’s date with the county/city auditor.
Almost every cass county property tax appeal comes down to one claim: the assessor thinks my home is worth more than it really is. Everything below is about proving that.
Do this first, before you file anything: ask for your property record card and read it. A surprising share of assessments are simply wrong on the facts – the wrong square footage, a bathroom you do not have, a finished basement that is bare concrete, a garage that was torn down. Factual errors are the easiest appeals to win, because there is nothing to argue about.
Then build the one thing that actually wins appeals: comparable sales. Find three to five homes near you, as similar as you can get on size, age, and condition, that sold recently for less than your assessed value. Not listings – sales. Not Zillow estimates – recorded sales. Boards ignore opinions and respond to comps.
A successful cass county property tax appeal does not change your tax rate – it lowers the value the rate is applied to, which lowers the bill for as long as the new value stands.
Appeals are heard by the Local, County, and State Boards of Equalization. In most places there is a free, informal step first – a conversation or a paper review with the assessor – and it resolves a large share of cases without a hearing. Take it. It costs you nothing and it is the fastest way to win.
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One honest warning: an appeal reviews your value, and a review can go up as well as down. That is uncommon when you bring real comparable sales, and it is exactly why you check your comps before you file.
Where to go: find your office through North Dakota Office of State Tax Commissioner, which lists the assessing office for every county in North Dakota.
Cass County property tax exemptions you may qualify for
This is where most homeowners quietly overpay their cass county property tax. Exemptions are almost never applied automatically – you have to claim them, and many people simply never do. It is worth ten minutes of your time to check.
HOMESTEAD: Up to $1,600 credit against your property tax (raised from $500 in 2025). Confirm current amount/application at the ND Tax Commissioner. | SENIOR: 100% reduction of taxable value (up to $9,000) if income is about $40,000 or less; 50% (up to $4,500) for income about $40,001-$70,000. Confirm current brackets with your county. | VETERAN: Credit scales with the disability rating on up to about $9,000 of taxable value (full at 100%). Confirm current figures with your county.
| DISABILITY: Homestead Credit as above; blind/disabled structure exemption up to about $160,000 (blind) / $120,000 (wheelchair-confined). Confirm current figures with your county.
Homestead: Primary Residence Credit – a state credit (up to $1,600) for ANY primary residence, with no age or income limit. Apply online to the Office of State Tax Commissioner between January 1 and April 1. It stacks with the Homestead Property Tax Credit below.
Senior / over-65: Homestead Property Tax Credit for owners 65+ or permanently and totally disabled, with household income up to about $70,000 (the prior asset limit was removed in 2023). It reduces the home’s taxable value; for the lowest incomes it can wipe out the bill, and it stacks with the Primary Residence Credit. Apply with your local assessor / county director of tax equalization.
Veteran: Disabled Veteran’s Property Tax Credit for veterans with a 50%+ service-connected disability (and surviving spouses): reduces the taxable value of the homestead by a percentage equal to the disability rating. Apply with the local assessor / county director of tax equalization.
Disability: Totally disabled homeowners can use the Homestead Property Tax Credit on the same income terms as seniors. Separately, homes owned/occupied by a blind person or a person permanently disabled and confined to a wheelchair may get a value exemption.
Common questions about cass county property tax
Why did my cass county property tax bill go up when I did nothing to the house?
Two different things can raise a bill: your assessed value went up, or a taxing district raised its rate. They are separate, and only the first one can be appealed. Your notice will show which changed.
Is it worth appealing my cass county property tax?
Ask one question: would a similar home near mine sell for less than the value the assessor has put on mine? If yes, you have a case, it is usually free to file, and in many places the informal review settles it without a hearing.
Do I need to hire someone to appeal?
No. The informal review and the local board are built for ordinary homeowners to use themselves, and there is normally no fee. Appeal services exist and can be worth it for some people, but you are not required to use one and you should never be told you are.
How is my cass county property tax bill actually calculated?
Your assessed value is multiplied by the combined rate of every district that taxes you, then any exemptions you have claimed are subtracted. That is why two neighbours can pay different amounts on identical homes – one of them claimed an exemption the other never did.
More on North Dakota property tax
- North Dakota property tax rates — how Cass County compares with every other county in the state.
- How to win your North Dakota property tax appeal — the evidence that works and what to say at the hearing.
- North Dakota property tax exemptions — who qualifies, how much each one saves, and how to apply.
- North Dakota property tax due dates — when the bill is due and what happens if you are late.
- Property tax by state — every state, side by side.
The bottom line on cass county property tax
Do two things this week. First, pull your property record card and check the facts – square footage, rooms, condition. Second, check whether you are claiming every exemption you are entitled to, because most people are not. If your cass county property tax value looks higher than what a similar home nearby would actually sell for, you have grounds to appeal – and the only thing that can stop you is the deadline above.
Where our cass county property tax figures come from
- U.S. Census Bureau, American Community Survey — the rate, median bill and median value on this page.
- Tax Foundation, Property Taxes by State and County — the same dataset and method.
- North Dakota Office of State Tax Commissioner — the office that can confirm your value, your exemptions and your deadline.
- North Dakota Office of State Tax Commissioner (tax.nd.gov); N.D. Century Code ch. 57
Informational only. Know Property Tax is not a government agency, not a county assessor, and not a tax-appeal service, and this is not legal, tax, or financial advice. Property tax rates, median bills, exemption amounts, and deadlines change every year, and every property is different. Any figure shown here is illustrative. Confirm your rate, your exemptions, and above all your appeal deadline with the office named on this page before you act.
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