Real Estate Assessments & Taxes

Fairfax County, Virginia

CONTACT INFORMATION: DTA is open 8:00 a.m. - 4:30 p.m. Monday through Friday. For your convenience, our full service counter is open until 6:30 p.m. on Thursdays for walk-in customers.

TTY 711

12000 Government Center Parkway, Suite 357
Fairfax, VA 22035

Howard Goodie,
Division Director

2018 Real Estate Assessment Notices Mailed Feb. 20

The Fairfax County Department of Tax Administration (DTA) begins mailing Tax Year 2018 real estate assessment notices to County taxpayers today. The notices will be sent to all County real estate owners.

Overall Assessment Changes

Of the county’s 353,904 taxable parcels, 259,444 experienced a value change for Tax Year 2018. 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 259,444 properties that have a 2018 assessment change, 8,303 are due to Growth, and 251,141 changed due to Equalization. The following chart categorizes the 345,601 total Equalization parcels by the number and percent that experienced 2018 value increases, decreases, or remained the same.

2018 Equalization Parcels that Increased, Decreased or Remained Unchanged
Equalization Base # of Parcels Parcels with an Increase Parcels with a Decrease Parcels Unchanged


215,995 (64.54%)

28,662 (8.56%)

90,031 (26.90%)


4,346 (39.82%)

2,138 (19.59%)

4,429 (40.58%)


220,341 (63.76%)

30,800 (8.91%)

94,460 (27.33%)


The January 1, 2018 taxable assessment base increased from the January 1, 2017 base. Main Book Assessments for 2018 total approximately $246.33 billion, which is an increase of approximately $8.54 billion, or 3.59 percent over the 2017 assessment base. The Equalization, Growth, Residential, and Non-Residential components are shown below.

2018 Equalization and Growth Changes and their Impact on the total 2017 Assessment Base
  Equalization Change Growth Change Total Change

$3.84 B (2.17%)

$1.01 B (0.57%)

$4.85 B (2.74%)


$2.30 B (3.79%)

$1.39 B (2.29%)

$3.69 B (6.08%)


$6.14 B (2.58%)

$2.40 B (1.01%)

$8.54 B (3.59%)


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 residential property for example, a key factor in determining the need to change assessments is the relationship of prior year assessments to the selling prices within neighborhoods.

The percentage of the base real estate assessment attributable to Commercial and Industrial property in FY 2019 is 19.43 percent. In addition, Multi-Family Rental Apartments comprise an additional 6.76 percent.

  • Refer to our Commercial Assessments Comparisons page for graphics depicting the non-residential assessment base by property type and a comparison of the average value change per square foot in the last 10 years.

Based on equalization changes, the mean assessed value of residential single family-detached properties for tax year 2018 is $656,071, up 2.11 percent. This group of properties makes up approximately 72 percent of the county’s residential equalization value.

The mean assessed value of Townhouse/Duplex properties for tax year 2018 is $409,792, up 2.86 percent. Condominium properties have a mean assessed value of $264,974, up 1.68 percent.

  • Refer to our Residential Assessments Comparison page for graphics depicting the average assessment and percentage change by zip code area, equalization changes in surrounding jurisdictions, and a year over year average value change by property type.


2018 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 2018 valuation are estimates based on the 2017 tax rates, as required by state law. Tax rates for 2018 have not yet been adopted by the Board of Supervisors. The Board will adopt 2018 tax rates as part of their deliberation on the FY 2019 Advertised Budget Plan.

Upon receipt of their annual assessment notice, property owners with questions or comments may contact DTA at 703-222-8234. Citizens may also choose to visit the new County 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, and download appeal forms.

Administrative appeals can be filed with DTA if property owners 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 also 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 May 1, 2018, or filed online by midnight (EST) of May 1, 2018. 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 also 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 disputes; however, property owners may appeal directly to the BOE or to the Circuit Court of Fairfax County.

By law, all appeals to the BOE must be filed and postmarked by June 1, 2018.