AppealDesk

Baltimore County Property Tax Appeal, Maryland

Travis BunnTravis Bunn·Updated July 24, 2026

Baltimore County is the third-most populous county in Maryland with a population of 854,535 as of the 2020 census. The county seat is Towson, and major population centers include Dundalk, Catonsville, Essex, Owings Mills, and Pikesville. Property tax appeals are particularly important in Baltimore County because homeowners face an effective tax rate of 1.07% to 1.29%, significantly higher than the national median of 0.92%. With a median home value ranging from $285,000 to $349,300 depending on the source, and median annual tax bills between $3,561 and $3,736, Baltimore County residents pay substantially more than the national median property tax bill of $2,400, making successful appeals crucial for reducing the tax burden.

Notable cities: Towson, Dundalk, Catonsville, Essex, Owings Mills, Pikesville

Median Home

$310,800

Tax Rate

1.10%

Annual Tax

$3,645

Population

854,535

On the typical Baltimore County home, valued near $310,800 at the county’s effective tax rate of 1.10%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: 45 days from the date of the assessment notice

Property owners in Baltimore County have 45 days from the date shown on their assessment notice to file an appeal with the State Department of Assessments and Taxation. For properties reassessed in the 2026 cycle (Group 2 properties), notices were mailed December 30, 2025, making the appeal deadline approximately February 13, 2026. If you purchase property between January 1 and June 30, you have 60 days from the transfer date to file a new owner appeal. For properties not in a reassessment year, you can file a Petition for Review by the first business day after January 1st.

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Colorful Annapolis, Maryland street of homes. Baltimore County appeal guide.

How Baltimore County Assesses Property

100%of market value

Assessed by: Maryland State Department of Assessments and Taxation (SDAT) - Baltimore County Assessment Office

Assessment cycle: triennial

Notices typically mailed: December (for properties reassessed in the 3-year cycle)

In Maryland, properties are assessed at 100% of full market value by the State Department of Assessments and Taxation. Baltimore County uses a triennial reassessment cycle, with approximately one-third of properties reassessed each year based on geographic areas (Groups 1, 2, and 3). For example, if your home's market value is $310,800 (the county median), at Maryland's 100% assessment ratio your assessed value would be $310,800, resulting in approximately $3,419 in annual county property taxes at Baltimore County's effective rate of 1.10%. The state also applies additional taxes at a rate of $0.112 per $100 of assessed value.

The Appeal Process

Appeals are heard by the Property Tax Assessment Appeals Board (PTAAB). PTAAB hearings in Baltimore County are informal proceedings where you present evidence to a board of local residents appointed by the Governor. You can appear in person or submit a written appeal. The board reviews your evidence, hears from the SDAT representative, and issues a decision. Most hearings last 5-15 minutes, and no attorney is required.

1

Step 1: Review your assessment notice carefully. Compare the assessed value to recent sales of similar properties in your neighborhood. Gather evidence including recent comparable sales, photos of property condition issues, repair estimates, and an independent appraisal if available.

2

Step 2: File your appeal within 45 days of the notice date. Use the online portal at assessmentappeals.dat.maryland.gov (recommended) or submit Form SDATRP_EX-4A by mail or in person. Include your notice number, control number, and a detailed explanation of why you believe the assessment is incorrect.

3

Step 3: First-Level Review with Local SDAT Office. Your appeal will be reviewed by the Baltimore County Assessment Office. You may request an informal meeting to discuss your evidence. The assessor may agree to reduce your assessment, or deny your appeal and provide reasons.

4

Step 4: If denied, appeal to the Property Tax Assessment Appeals Board (PTAAB). File your PTAAB appeal promptly after receiving the denial. You can choose a written appeal or an in-person hearing before the board. No fees are required. Present your comparable sales, photos, and other evidence. Hearings typically last 5-15 minutes.

5

Step 5: If still dissatisfied, appeal to the Maryland Tax Court within 30 days of the PTAAB decision. This is a de novo hearing (a fresh review) with no filing fees. You must appear in person. The court issues decisions within approximately one month for residential properties.

6

Step 6: As a final option, if the Maryland Tax Court decision is unsatisfactory, you may appeal to the Circuit Court within 30 days, though this level involves formal legal proceedings and may require an attorney.

Required form: Online appeal form via SDAT portal or Form SDATRP_EX-4A (Petition for Review)

Filing Methods

online:File electronically at assessmentappeals.dat.maryland.gov using the notice number and control number from your assessment notice. This is the fastest and most convenient method.
mail:Mail completed appeal form to: Baltimore County Assessment Office, Hampton Plaza, Suite 602, 300 East Joppa Road, Towson, MD 21286
in-person:Deliver appeal form to the Baltimore County Assessment Office at 300 East Joppa Road, Suite 602, Towson, MD 21286. Office hours: 8:00 AM to 4:30 PM, Monday-Friday. Contact: (410) 512-4900

Evidence to Bring

Recent comparable sales (sold within past 6-12 months, similar size, condition, and location)Photos showing property condition issues, deferred maintenance, or functional obsolescenceContractor estimates for needed repairs or renovationsIndependent appraisal or broker price opinionProperty tax assessments of comparable propertiesDocumentation of property characteristics (square footage, lot size, room count)

Baltimore County Assessor Contact

Baltimore County Assessment Office - Maryland State Department of Assessments and Taxation

Website: https://dat.maryland.gov

Online Portal: https://assessmentappeals.dat.maryland.gov

Hours: Monday-Friday, 8:00 AM to 4:30 PM

Tax Exemptions in Baltimore County

Homestead Tax Credit

Baltimore County caps assessment increases at 4% per year; Maryland state caps increases at 10% per year

The Homestead Tax Credit limits the annual increase in your property's taxable assessment to protect homeowners from large tax increases due to rising property values. This is the most important property tax relief program in Maryland.

Eligibility: Owner-occupied principal residence. You must file a one-time application with SDAT to establish eligibility. The credit continues automatically each year as long as you own and occupy the property.Deadline: One-time application required; no annual renewal needed once approved

Homeowners' Property Tax Credit

Variable based on income; can provide substantial tax relief for eligible homeowners

State program providing credits for homeowners of all ages whose property taxes exceed a percentage of their gross household income. This is an income-based credit that can significantly reduce your tax bill if you qualify.

Eligibility: Combined gross household income of $60,000 or less, net worth under $200,000. Must own and occupy property as principal residence. Credit is limited to taxes on residential dwelling only.Deadline: Applications accepted throughout the year; apply early for maximum benefit

Disabled Veterans Property Tax Exemption

100% exemption for 100% service-connected disabled veterans

Complete exemption from all property taxes on the principal residence for qualifying disabled veterans.

Eligibility: Veterans with 100% service-connected disability rating from the VA. Must be the veteran's principal residence. Surviving spouses may also qualify under certain conditions.Deadline: File Form AT3-45 with SDAT; exemption continues once granted until status changes

Senior Citizens and Retirees Property Tax Credit

Variable based on age, income, and local jurisdiction; can provide 20% or more reduction in county taxes

Baltimore County and Maryland offer various local tax credits for senior homeowners meeting income requirements. These credits work in addition to the Homestead Tax Credit.

Eligibility: Typically age 65 or older, with income restrictions varying by program. Must own and occupy property as principal residence.Deadline: Contact SDAT at (410) 512-4900 or Baltimore County for specific program deadlines

Surviving Spouse of Fallen Law Enforcement or Rescue Worker Credit

Full property tax credit on principal residence

Baltimore County provides a property tax credit to surviving spouses of law enforcement officers or rescue workers (including volunteers) who died in the line of duty in Maryland while employed by Baltimore County.

Eligibility: Surviving spouse of fallen law enforcement officer or rescue worker whose death occurred during employment with Baltimore CountyDeadline: Application must be submitted on or before September 30 in the taxable year for which credit is desired

Baltimore County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Baltimore County for 2026?
Baltimore County property owners have 45 days from the date shown on their assessment notice to file an appeal. For properties reassessed in the 2026 cycle (Group 2 properties), assessment notices were mailed December 30, 2025, making the typical appeal deadline February 13, 2026. However, your specific deadline is calculated from the date on your individual notice, so check your notice carefully. If you miss the 45-day deadline, you may still file a Petition for Review by the first business day after January 1st if you're not in a reassessment year, though this is more limited in scope.
How do I file a property tax appeal in Baltimore County online?
The easiest way to file a property tax appeal in Baltimore County is through the Maryland SDAT online portal at assessmentappeals.dat.maryland.gov. You'll need your notice number and control number, which are printed on the top and bottom of page 1 of your assessment notice. The online system walks you through each step, allows you to upload supporting documents like comparable sales and photos, and provides immediate confirmation of your submission. This method is faster than mailing paper forms and ensures your appeal is received before the 45-day deadline. You can also track the status of your appeal through the online system.
What is the homestead tax credit worth in Baltimore County?
The Homestead Tax Credit in Baltimore County caps the annual increase in your property's taxable assessment at 4% for county taxes (the state portion is capped at 10%). This can save thousands of dollars per year if property values are rising rapidly. For example, if your home's market value increases from $310,000 to $350,000 in one year (a $40,000 or 12.9% increase), the Homestead Credit limits your taxable increase to just 4%, saving you approximately $1,089 in county taxes that year. The credit is automatic once you file a one-time application with SDAT, and it continues as long as you own and occupy the property as your principal residence. This is the single most valuable property tax benefit available to Baltimore County homeowners.
How much can I save by appealing my property taxes in Baltimore County?
The amount you can save depends on how much your assessment is reduced. With Baltimore County's effective tax rate of approximately 1.10%, every $10,000 reduction in assessed value saves you about $110 per year in property taxes. National statistics show that about 25% of homes are over-assessed, with successful appeals averaging $1,346 in annual savings. In Baltimore County, where the median home value is $310,800 and median tax bill is $3,645, even a modest 10% reduction in assessed value ($31,080) would save $342 annually. Because Maryland uses a three-year reassessment cycle, a successful appeal locks in savings for three full years until the next reassessment, potentially saving over $1,000 during that period.
What evidence do I need to win a property tax appeal in Baltimore County?
The most persuasive evidence for a Baltimore County property tax appeal includes recent comparable sales (homes similar to yours that sold within the past 6-12 months for less than your assessed value), photos documenting property condition issues or needed repairs, and contractor estimates showing the cost to fix problems. An independent appraisal from a licensed appraiser is also powerful evidence, though not required. The key is to show that your home's actual market value on the assessment date was lower than the SDAT's determination. Focus on properties in your immediate neighborhood with similar square footage, age, and features. Organize your evidence clearly with a cover letter summarizing your argument and specific requested assessed value.
What happens at a Property Tax Assessment Appeals Board hearing in Baltimore County?
A PTAAB hearing in Baltimore County is an informal proceeding before a board of three local residents appointed by the Governor. The hearing location is Hampton Plaza, 300 E. Joppa Road, Suite 404, Towson, MD 21286. You'll have approximately 5-15 minutes to present your case, show your evidence (comparable sales, photos, appraisals), and explain why you believe your assessment is too high. The SDAT representative will also present their evidence supporting the assessment. The board members may ask questions about your property or evidence. You don't need an attorney, and the atmosphere is conversational rather than adversarial. After the hearing, the board issues a written decision, typically within a few weeks, either upholding the assessment, reducing it, or in rare cases increasing it.
Does Baltimore County reassess property values every year?
No, Maryland uses a triennial (three-year) reassessment cycle rather than annual assessments. Baltimore County is divided into three geographic assessment areas called Groups 1, 2, and 3, with each group reassessed once every three years on a rotating schedule. For example, Group 2 properties were reassessed for 2026 with notices mailed in December 2025. This means if your property is not in the current reassessment year, your assessed value generally stays the same (subject to the Homestead Tax Credit cap if applicable). However, you can still appeal your assessment in non-reassessment years by filing a Petition for Review if you have evidence of substantial error, property damage, or other changes that affect value.
Can I appeal to Maryland Tax Court if PTAAB denies my Baltimore County appeal?
Yes, if you're dissatisfied with the Property Tax Assessment Appeals Board decision, you have the right to appeal to the Maryland Tax Court within 30 days of the PTAAB decision. The Maryland Tax Court conducts a de novo hearing, meaning they review your case fresh without considering what happened at PTAAB. There are no filing fees for Tax Court appeals, and you must appear in person at the hearing. The proceedings are more formal than PTAAB but still considered informal administrative hearings. The Tax Court typically issues decisions within approximately one month for residential properties. You'll need to comply with Rule 7, which requires exchanging a list of comparable properties with SDAT at least 10 days before the hearing. Many property owners successfully represent themselves at this level without an attorney.

Official Resources

Maryland SDAT Online Assessment Appeal Portal →

Official online portal to file property assessment appeals within 45 days of your notice date.

Maryland Department of Assessments and Taxation →

Complete information about the assessment appeal process, deadlines, and forms.

Baltimore County PTAAB Contact Information →

Contact details and board member information for the Baltimore County Property Tax Assessment Appeals Board.

SDAT Real Property Search →

Look up your property's current assessment, tax history, and property characteristics.

Baltimore County Tax Payment Portal →

Search and pay property taxes online, and access tax bills and payment history.

Maryland Homestead Tax Credit Application →

Apply for the Homestead Tax Credit to cap annual assessment increases at 4% for county taxes.

For state-wide appeal information including Maryland's assessment ratio and deadlines, see our Maryland Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

More Maryland Counties

Anne Arundel County (Annapolis)Montgomery County (Rockville)Prince George's County (Bowie)
← All Maryland property tax appeal info

Sources: https://dat.maryland.gov/realproperty/pages/assessment-appeal-process.aspx | https://assessmentappeals.dat.maryland.gov | http://www.ptaab.state.md.us/baltimore | https://www.ownwell.com/trends/maryland/baltimore-county | https://taxbycounty.com/maryland/baltimore-county | https://propertytaxbystate.com/maryland/baltimore-county | https://www.baltimorecountymd.gov/departments/budfin/taxpayer-services/tax-credits | https://propertytaxrates.org/exemptions/maryland/

Last verified: 2026-07-24