Appeal Property Tax Assessment in Baltimore

Taxation and Finance Maryland 3 Minutes Read · published February 08, 2026 Flag of Maryland

In Baltimore, Maryland property owners can challenge real property assessments made by the state assessment authority and review local tax treatments. This guide explains who oversees assessments, how to gather evidence, where to file an appeal, and the next steps if you disagree with an assessed value. Use the official state and city resources linked below to confirm deadlines and required forms before you submit an appeal.[1]

Overview of Assessment Appeals

Real property assessments affecting Baltimore property taxes are administered through Maryland's Department of Assessments and Taxation (DAT). Appeals concern the assessed value used to calculate local property tax bills and are handled at the state assessment office; Baltimore City bills and collects taxes based on those assessments.[1] For city-specific billing, exemptions, and payment procedures consult Baltimore City Finance resources.[3]

Penalties & Enforcement

Appealing an assessment does not itself create a fine, but unpaid property taxes based on assessed values can lead to enforcement actions by Baltimore City. Where the official pages specify amounts or procedures, they are cited below; where a figure or deadline is not shown on the cited page the text states that explicitly.

  • Fines or daily penalties for appeal-related violations: not specified on the cited page.[1]
  • Tax enforcement for unpaid property taxes: tax liens and collection actions are managed by Baltimore City Finance; specific sale or lien timelines must be confirmed on the city site.[3]
  • Escalation: repeat or continuing nonpayment can lead to lien, collection, and possible sale; dollar ranges for penalties are not specified on the cited pages.[3]
  • Enforcer: Maryland Department of Assessments and Taxation (assessment determinations) and Baltimore City Department of Finance (billing, liens, collections). Contact links are listed in Resources.
Appealing an assessment challenges the valuation, not the tax rate.

Appeals, Reviews, and Time Limits

  • Where to file: appeals for assessment must be filed with Maryland DAT as described on its Assessment Appeals page.[1]
  • Time limits for filing: the official state page provides filing procedures but does not specify a single universal deadline on that page; consult the state appeals page and forms listed below for exact filing windows and any county-specific rules.[1]
  • Appeal review: DAT will process the petition and notify parties of hearings or determinations; the city does not decide assessment appeals but uses the resulting assessment for tax billing.[1]

Defences and Discretion

  • Common defences: factual evidence of lower comparable sales, documentation of condition, income/expense records for income-producing properties.
  • Permits/variances: separate local permits or successful variances may influence valuation but are handled by relevant city departments; check Baltimore City records for permits.

Common Violations

  • Failing to pay tax bills based on contested assessments — enforcement via liens and collections.[3]
  • Missing deadlines to file an appeal with the state assessment office — check the DAT forms and instructions for filing windows.[2]

Applications & Forms

The Maryland DAT publishes forms and filing instructions for assessment appeal petitions on its Real Property Forms page. The forms page lists the documents used to start or support an appeal; where a form number is shown it is on the DAT forms page. Fees related specifically to filing an assessment petition are not listed on the linked form index and should be confirmed on the form or by contacting DAT.[2]

How to

  1. Review your assessment notice and valuation details from Maryland DAT.
  2. Gather supporting evidence: comparable sales, photos, repair records, income/expense statements.
  3. Obtain and complete the appropriate petition or form from the Maryland DAT forms page and follow submission instructions.[2]
  4. Submit the petition to Maryland DAT as instructed and retain proof of filing; attend any scheduled hearings and present your evidence.
  5. If you disagree with the DAT decision, follow the appeals pathway described by DAT or seek advice on judicial review options as indicated on DAT materials.

FAQ

Who decides my property assessment?
The Maryland Department of Assessments and Taxation administers property assessments; Baltimore City uses those assessments for tax billing and collections.[1]
How do I file an appeal?
File a petition with Maryland DAT using the forms and instructions on DAT's Real Property pages; include supporting evidence and follow any filing windows noted on the forms.[2]
Will filing an appeal stop a tax bill or collection?
Filing an appeal challenges the assessed value but does not automatically stop billing or collections by Baltimore City; consult the city finance pages for collection policies.[3]

Key Takeaways

  • Assessment appeals for Baltimore property are handled through Maryland DAT.
  • Gather clear, document-based evidence before filing an appeal.
  • Use official DAT and Baltimore City Finance contacts for forms and billing questions.

Help and Support / Resources

  1. [1] Maryland Department of Assessments and Taxation - Assessment Appeals
  2. [2] Maryland DAT - Real Property Forms
  3. [3] Baltimore City Department of Finance - Property Taxes

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