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Carroll County, MD

Carroll County property tax appeal 2027: deadline, forms and how to file

Scan from recent salesFacts not yet verified by a person — confirm on your notice

To appeal a Carroll County assessment, file with the SDAT Supervisor of Assessments; in Maryland the deadline is 45 days after the reassessment notice. Confirm the exact date on your notice or with the assessor; we add each county's 2027 date here when it is published.

Data as of 20 Oct 2026 · the Carroll County assessor
Your home

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Free. We compare the value on your notice with recent sales of similar homes nearby and tell you whether an appeal is worth filing. Have your assessment notice and tax bill handy.

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How to file

How to file in Carroll County

  1. Step 1

    File the appeal

    Use the method your notice lists, by the deadline on the notice.

  2. Step 2 · before the hearing

    Prepare and submit your evidence

    Comparable assessed values, photographs of condition issues and recent sales where they are public. Ask the appraisal office for the evidence it will use.

  3. Step 3

    Meet, then hear

    An informal review usually comes before a formal hearing; most reductions happen at the informal stage.

Before you file: how to read your notice · evidence that works · informal vs formal hearing · when not to appeal

Questions

Carroll County questions

Data as of 20 Oct 2026 · Maryland statutes
When is the property tax appeal deadline in Carroll County?

Maryland law sets it: 45 days from the date of the reassessment notice; new owners 60 days after a transfer between January 1 and July 1; Petition for Review in off-cycle years by the first working day after January 1 (Tax-Prop. §§14-502, 14-503). Confirm the exact date on your notice or with the assessor.

Who hears a appeal in Carroll County?

The SDAT Supervisor of Assessments hears the first appeal. Filing rules: Md. Code, Tax-Prop. §§14-502, 14-503.

What value should I compare on my Maryland notice?

The figure labeled “Total Market Value”. Maryland appeals are argued against market value as of January 1 date of finality before the July 1 taxable year (Md. Code, Tax-Prop. §1-101(i), §8-102(a)).

Does Maryland cap assessment increases?

Increases are phased in equally over three years; decreases apply at once (Tax-Prop. §8-103). Homestead Tax Credit for an owner-occupied principal residence: taxable assessment growth over 10% a year is credited for State tax, and counties and municipalities set their own cap from 0% to 10% (Tax-Prop. §9-105). Requires a one-time application.

Your home

Check whether yours is over-assessed

Nearby

Nearby counties

Frederick County · Howard County · Baltimore County · Baltimore city · Montgomery County · Harford County · Washington County

Sources
  1. Md. Code, Tax-Prop. §14-502
  2. Md. Code, Tax-Prop. §14-510.1
  3. Md. Code, Tax-Prop. §8-103 (phase-in)
  4. Md. Code, Tax-Prop. §9-105 (homestead credit)
  5. U.S. Census Bureau, county population estimates (2024) and county gazetteer (2024).