Property Taxes in Marriottsville, Maryland
Median Marriottsville, Maryland effective property tax rate: 1.45%, significantly higher than the national median of 1.02%, and higher than the Maryland state median of 1.21%.
Median Marriottsville, Maryland home value: $598,900
Median annual Marriottsville, Maryland tax bill: $8,971, $6,571 higher than the national median property tax bill of $2,400.
How are property taxes in Howard calculated?
Property taxes in Marriottsville, Maryland are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Marriottsville's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Marriottsville, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Marriottsville Property Tax Calculator Work?
Use this Marriottsville property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Marriottsville's median effective tax rate of 1.45% — based on actual property records in Howard County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Marriottsville's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Marriottsville: rates range from 1.45% in 21104 to 1.45% in 21104, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Marriottsville.
About Marriottsville Property Taxes
About Property Taxes in Marriottsville, Howard, Maryland
Marriottsville's median effective property tax rate of 1.45% is higher than the Maryland state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Howard County base levy combined with local school district levies and special taxing districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Marriottsville. Homeowners in the 21104 ZIP code carry a median effective rate of 1.45%, while those in 21104 pay 1.45%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Howard County. Understanding which part of Marriottsville you live in can make a meaningful difference to your annual tax bill.
Marriottsville homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the February 13, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Marriottsville, Howard County, Maryland
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Marriottsville's effective property tax rate to other cities in Maryland and the median property tax rates in Maryland and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Marriottsville Tax Rate
1.45%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Howard County Tax Rate
1.40%
Median Effective Maryland Tax Rate
1.21%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Marriottsville, Howard County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21104 | 1.39% | 1.44% | 1.45% | 1.51% | 1.57% |
Source: Ownwell
Property Tax Assessment Values Across Marriottsville, Howard County, Maryland
When examining property taxes in Marriottsville, Maryland, understanding the distinction between market value and assessed value is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Howard County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Howard County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Marriottsville.
For example, the median home price in Marriottsville is $598,900, with tax bills ranging significantly across the county. 21104 has the highest median home price at $598,900.
Property Tax Assessment Values Across Marriottsville, Howard County, Maryland
Source: Ownwell
$378,400
$646,350
$914,300
Median Marriottsville Market Value
$598,900
Median Howard County Market Value
$507,600
Median Maryland Market Value
$338,400
Median United States Market Value
$274,101
Property Tax Assessment Values Across Marriottsville, Howard County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21104 | $310,800 | $472,775 | $598,900 | $736,750 | $839,700 |
Source: Ownwell
Property Tax Bills Across Marriottsville, Howard County, Maryland
How are property tax bills calculated in Marriottsville?
Property tax bills in Marriottsville are based on the assessed value of a home and the local tax rate set by Howard County. When a property’s market value rises, the assessed value can increase as well, which may lead to a higher tax bill. Homeowners are taxed on that assessed value, not on what they originally paid for the home.
What factors affect the bill? Home value, assessment changes, and the county’s tax rate all play a role. In Marriottsville, the median home price is $598,900, and property tax bills are often substantial, with the 25th percentile at $7,286, the median at $8,971, and the 75th percentile at $10,812. That is well above the national median property tax bill of $2,400.
How does this affect homeowners? Higher assessments can increase annual housing costs and make budgeting more difficult, especially when values move upward.
Median Marriottsville Tax Bill
$8,971
Median Howard County Tax Bill
$7,069
Median Maryland Tax Bill
$4,092
Median United States Tax Bill
$3,209
Property Tax Bills Across Marriottsville, Howard County, Maryland
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 21104 | $5,183 | $7,286 | $8,971 | $10,812 | $12,447 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | February 13 |
Links | |
|---|---|
| Howard Tax Assessor | |
| Website | sdat.dat.maryland.gov |