Real Estate Assessments & Taxes

Fairfax County, Virginia

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TTY 711

12000 Government Center Parkway, Suite 357
Fairfax, VA 22035

Thomas Reed,
Division Director

2021 Real Estate Assessment Notices Mailed Feb. 23

The Fairfax County Department of Tax Administration (DTA) begins mailing Tax Year 2021 real estate assessment notices to County taxpayers today. The notices will be sent to all County real estate owners.

Of the County’s 356,171 taxable parcels, 326,263 experienced a value change for Tax Year 2021. The assessed value of properties may change for a variety of reasons. Among these are market driven value increases or declines, referred to as Equalization changes, and/or value changes generated by structural changes (i.e. new construction, remodeling), rezonings, and land divisions/consolidations, referred to as Growth changes. A combination of these factors can apply to the same property.

Overall, of the 326,263 properties that have a 2021 assessment change, 7,713 are due to growth, and 318,550 changed due to equalization. The following chart categorizes the 348,458 equalization parcels by the number and percent that experienced 2021 value increases, decreases, or remained the same.

2021 Equalization Parcels that Increased, Decreased or Remained Unchanged

Equalization Base # of Parcels Parcels with an Increase Parcels with a Decrease Parcels Unchanged


297,059 (88.0%)

14,943 (4.4%)

25,542 (7.6%)


1,956 (17.9%)

4,592 (42.1%)

4,366 (40.0%)


299,015 (85.8%)

19,535 (5.6%)

29,908 (8.6%)









The January 1, 2021 taxable assessment base increased from the January 1, 2020 base. Main Book Assessments for 2021 total approximately $272.42 billion, which is an increase of approximately $7.62 billion, or 2.88 percent over the 2020 assessment base. The Equalization, Growth, Residential, and Non-Residential components are shown below.

2021 Equalization and Growth Changes

  Equalization Change Growth Change Total Change

$8.22 B (4.25%)

$1.48 B (0.76%)

$9.70 B (5.01%)


-$2.88 B (-4.05%)

$0.80 B (1.13%)

-$2.08 B (-2.92%)


$5.34 B (2.02%)

$2.28 B (0.86%)

$7.62 B (2.88%)









It is important to note that these percentages represent the aggregate change to the overall tax base and are not necessarily indicative of a specific change to any singular property. Individual assessment changes may vary considerably. For example, a key factor in determining the need to change residential assessments is the relationship of prior year assessments to the current sales prices of comparable properties.

The percentage of the 2021 base real estate assessment attributable to commercial and industrial property is 18.17 percent. Multi-family rental apartments comprise an additional 7.50 percent.

Based on equalization changes, the mean assessed value of residential single family detached properties for Tax Year 2021 is $725,327, up 4.17 percent. This group of properties makes up 71.3 percent of the county’s residential equalization value.

The mean assessed value of townhouse/duplex properties for Tax Year 2021 is $460,526, up 5.13 percent. Condominium properties have a mean assessed value of $304,877, up 4.62 percent.

As noted in the FY 2022 Advertised Budget Plan, the mean assessed value for Tax Year 2021 of all improved residential property is approximately $607,752.

The percentage of residential equalization change by magisterial district is illustrated on the accompanying map. Again, it is important to note that individual properties may experience value changes that are considerably different than the percentages shown on the map.

2021 Notice of Assessment, Contact and Appeal Information

Pursuant to state law, taxpayers are provided prior year tax amounts on their real estate notice along with assessed value information. It is important to understand that the tax amounts shown on the notice for the current 2021 valuation are estimates based on the 2020 tax rates, as required by state law. Tax rates for 2021 have not yet been adopted by the Board of Supervisors. The Board will adopt 2021 tax rates as part of their deliberation on the FY 2022 Advertised Budget Plan.

Upon receipt of their annual assessment notice, residents and businesses with questions or comments may contact DTA at 703-222-8234 (TTY 711) or visit our website at By doing so, they can review individual property characteristics, including their own, and obtain a list of residential sales within each assessment neighborhood. They may also review answers to frequently asked questions.

New for 2021, property owners or businesses may visit the County website at to request a virtual or phone appointment with a DTA team member.

Administrative appeals can be filed with DTA if taxpayers believe their assessment is not equitable in comparison with similar properties or if they believe their assessment exceeds fair market value. Both non-residential and residential property appeals may be made in writing to the Real Estate Division of DTA, but only residential assessment appeals can be initiated online through DTA’s website, Appeal application forms can be obtained by calling DTA or by downloading them directly from DTA’s webpage.

DTA encourages property owners to file appeals as early as possible. Administrative appeal applications must be postmarked by April 1, 2021, filed online or emailed to by midnight (EST) of April 1, 2021. Administrative appeals will not be accepted after this date.

Real Estate appeals can also be filed with the Board of Equalization (BOE). Under State law, the BOE is separate from the DTA and consists of nine taxpayers appointed by the Board of Supervisors. The BOE conducts formal hearings and considers sworn testimony. BOE appeal forms are available on the BOE website at or by calling the BOE office at 703-324-4891.

Property owners are encouraged to contact DTA concerning assessment concerns; however, property owners may appeal directly to the BOE or to the Circuit Court of Fairfax County.

The statutory deadline for filing an appeal with the BOE is June 1st, 2021. 

Fairfax Virtual Assistant