Baltimore City homeowners pay a median of $3,354 a year in property tax on a median home value of $229,600. Its effective tax rate (property taxes paid as a share of home values, per the Tax Foundation) is 1.37%, the highest of 24 Maryland counties. The state agency SDAT, through the SDAT Baltimore City Assessment Office, values homes in Baltimore City once every three years. Baltimore City sets its own tax rate and sends the tax bill.
Opens soonThe 45-day window for the 2026 reassessment notices (mailed December 30, 2025) closed in mid-February 2026. SDAT normally mails the next third of homes their notices in late December 2026. If your home is not being reassessed, you can file a Petition for Review now through the first business day after January 1, 2027.
Appeal within 45 days of the date printed on your assessment notice (not the day you received it). You can appeal online with the control number on the notice, or mail the paper form to your county's SDAT assessment office. If you missed that window, or your home was not reassessed this year, you can file a Petition for Review by the first business day after January 1; it applies to the tax year that starts the next July 1. If you bought the home between January 1 and June 30, you can appeal within 60 days of the transfer. SDAT counts from the date the deed was recorded unless you show a different transfer date, and the deed must be recorded before SDAT will act. Example: SDAT mailed the 2026 Group 2 notices, including those in Washington County, on December 30, 2025, so the 45-day deadline for those owners was February 13, 2026.
Phone: 410-767-8250
Email: [email protected]
Address: 6 Saint Paul St., 11th Floor, Baltimore, MD 21202
Supervisor of Assessments: Jamise Jackson
Official website: dat.maryland.gov
This SDAT office keeps your property record, sends you a free property worksheet and sales list, and holds the first-level appeal hearing.
Phone: 410-767-8456
Email: [email protected]
Address: 6 St. Paul St., Suite 301, Baltimore, MD 21202-1631
Official website: ptaab.maryland.gov
Hears appeals of the value. Check its filing window and rules.
SDAT mails a Notice of Assessment in late December to the group being reassessed. It shows your old and new market value, the phased-in values for the next three years, and your Homestead Credit status. A paper appeal form and instructions come with it. In the two years between reassessments you usually get no notice.
Look up your home on the SDAT Baltimore City Assessment Office website and check square footage, bathrooms, condition and features. Mistakes are the easiest wins. Use our record card checklist.
Appeal within 45 days of the date on your notice: online with the notice's control number, or by mailing the paper form to the SDAT Baltimore City Assessment Office. If you missed it, file a Petition for Review by the first business day after January 1.
Recent sales of similar homes close to you, sold as near as possible to (but not after) January 1, the date of finality; SDAT's Area Sales Listing and your property worksheet, which SDAT sends free before the hearing; Errors on the property worksheet: wrong square footage, bathrooms, fireplaces, finished basement or condition; A recent appraisal (at PTAAB, give it to the assessment office at least 10 days before the hearing).
You carry the burden of proof at every level. PTAAB rules say you must show the Supervisor's decision was wrong, and PTAAB's own FAQ says this means clear and convincing evidence. At the Maryland Tax Court the case is heard fresh (de novo), but you still need evidence of your home's market value.
Next step: Property Tax Assessment Appeals Board (PTAAB) for your county, then the Maryland Tax Court. Within 30 days of the date of SDAT's final notice from the Supervisor's level. Tax Court: within 30 days of the date of the PTAAB order. File a written appeal with your county's PTAAB, following the directions on SDAT's final notice. There is no fee. PTAAB is a board of local residents appointed by the Governor (three members plus alternates), and it is independent of SDAT. It is a new hearing, so bring all your evidence again (four copies), or appeal in writing. You and SDAT must swap any written appraisals at least 10 days before the hearing. You can postpone up to two times; if you neither appear nor send a written case, the appeal is dismissed. For a home, the board must send its order within 30 days after the hearing. If you still disagree, appeal to the Maryland Tax Court within 30 days. Tax Court has no filing fee, but you must attend in person (no written appeals). Residential hearings are usually held 4 to 8 months after filing. Tax Court decisions can be appealed to the circuit court, which charges a filing fee.
Enter the market value on your assessment notice and what you think the home would really sell for. We estimate the yearly saving if the board agrees with you.
Some states cap how fast the taxable value of a home can rise (California, Florida, Michigan and Texas homesteads, for example). If your taxable value is already held below market value by a cap, a lower market value may not lower this year's bill.
Fill in your details and download a written appeal statement as a PDF or Word file. Most boards also require their own appeal form: file the form and attach this letter and your evidence to it.
Tax Appeal Map is a free information site, not a law firm or appraiser. The letter is a template, not legal advice.
Appeal within 45 days of the date printed on your assessment notice (not the day you received it). You can appeal online with the control number on the notice, or mail the paper form to your county's SDAT assessment office. If you missed that window, or your home was not reassessed this year, you can file a Petition for Review by the first business day after January 1; it applies to the tax year that starts the next July 1. If you bought the home between January 1 and June 30, you can appeal within 60 days of the transfer. SDAT counts from the date the deed was recorded unless you show a different transfer date, and the deed must be recorded before SDAT will act. Example: SDAT mailed the 2026 Group 2 notices, including those in Washington County, on December 30, 2025, so the 45-day deadline for those owners was February 13, 2026.
File the first appeal with the SDAT Baltimore City Assessment Office (State Department of Assessments and Taxation), online or by mail. Later appeals go to the Baltimore City Property Tax Assessment Appeals Board and then the Maryland Tax Court.
Phone 410-767-8250. Website: dat.maryland.gov.
No fee. Worksheets for comparable properties cost $1 each.
Contact details change; call or check the office website before you visit.