Real Estate Assessments & Taxes

CONTACT INFORMATION: We are open weekdays from 8AM to 4:30PM on the phones or to walk-in traffic. Save a trip! Use our self-service options on this website to pay your taxes or make a phone or video appointment at your convenience.
703-222-8234 TTY 711
12000 Government Center Parkway, Suite 357
Fairfax, VA 22035
Thomas Reed
Division Director

2023 Real Estate Assessment Notices Mailed Feb. 21

The Fairfax County Department of Tax Administration (DTA) begins mailing Tax Year 2023 real estate assessment notices to County taxpayers today. The notices will be sent to all County real estate owners.

Of the County’s 357,540 taxable parcels, 328,096 experienced a value change for Tax Year 2023. 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), rezoning, and land divisions/consolidations, referred to as Growth changes. A combination of these factors can apply to the same property.

Overall, of the 328,096 properties that have a 2023 assessment change, 9,250 are due to growth, and 318,846 changed due to equalization. The following chart categorizes the 348,290 equalization parcels by the number and percent that experienced 2023 value increases, decreases, or remained the same.

2023 Equalization Parcels that Increased, Decreased or Remained Unchanged

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


301,836 (89.45%)

10,543 (3.12%)

25,060 (7.43%)


4,845 (44.65%)

1,622 (14.95%)

4,384 (40.40%)


306,681 (88.05%)

12,165 (3.49%)

29,444 (8.46%)









The January 1, 2023 taxable assessment base increased from the January 1, 2022 base. Main book assessments for 2023 total approximately $315.27 billion, which is an increase of approximately $19.50 billion, or 6.59 percent over the 2022 assessment base. The Equalization, Growth, Residential, and Non-Residential components are shown below.

2023 Equalization and Growth Changes

  Equalization Change Growth Change Total Change

$15.63 B (6.97%)

$1.90 B (0.85%)

$17.53 B (7.82%)


$1.18 B (1.65%)

$0.79 B (1.10%)

$1.97 B (2.75%)


$16.81 B (5.68%)

$2.69 B (0.91%)

$19.50 B (6.59%)









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.   

2023 Residential Mean Assessed Value and Equalization Changes by Property Type

  2023 Mean Assessed Value % Change
Single Family


















As noted in the FY 2024 Advertised Budget Plan, the mean assessed value for tax year 2023 of all improved residential property is approximately $719,522.

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.

2023 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 2023 valuation are estimates based on the 2022 tax rates, as required by state law. Tax rates for 2023 have not yet been adopted by the Board of Supervisors. The Board will adopt 2023 tax rates as part of their deliberation on the FY 2024 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.

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 appeals filed after April 3, 2023 will not be accepted. Electronic Appeals must be received no later than 4:30 p.m. (EDT) on April 3, 2023. 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 independent from 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, 2023. BOE appeals emailed/uploaded to ShareFile must be received by 4:30 p.m. (EDT) June 1, 2023. 

Fairfax Virtual Assistant