How to Appeal Property Taxes in Fairfax County, Virginia (2026 Guide)

For the 2026 Fairfax County assessment, the first deadline was April 1, 2026 at 4:30 p.m. for a Department of Tax Administration administrative appeal, and the final county-level deadline was June 1, 2026 for the Board of Equalization of Real Estate Assessments. As of July 18, 2026, both 2026 filing deadlines have passed; the next routine residential administrative appeal deadline is expected to be April 1, 2027.

File administrative appeals with Fairfax County DTA, Real Estate Division, 12000 Government Center Parkway, Suite 357, Fairfax, VA 22035, or by email to DTAREDAppeals@fairfaxcounty.gov when the appeal window is open. BOE appeals use the Application for Equalization of Real Property Assessment and go to 12000 Government Center Parkway, Suite 331, Fairfax, VA 22035-0033, BoardOfEqualization@fairfaxcounty.gov, or BOE’s Egnyte upload process. (fairfaxcounty.gov)

How assessments work in Fairfax County

Fairfax reassesses real estate every year, with values effective January 1. DTA’s job is to estimate fair market value uniformly; for most homes, the county relies heavily on comparable sales and computer-assisted mass appraisal, while still considering cost and income approaches where relevant. (fairfaxcounty.gov)

The 2026 notices were mailed beginning February 17, 2026. Countywide, the 2026 main-book assessment base was about $354.06 billion, up 3.77% from 2025. For residential equalization parcels, 81.16% increased, 7.85% decreased, and 10.99% were unchanged; the mean 2026 assessed value was $1,012,504 for single-family homes, $612,580 for townhomes, and $387,560 for condos. Those are market-wide figures, not proof that your house is right or wrong. (fairfaxcounty.gov)

Your tax is not set by the assessor alone. The assessment is multiplied by the tax rate. For 2026, Fairfax County’s base real estate tax rate is $1.12 per $100 of assessed value. Many parcels also pay add-ons such as the Stormwater Service District rate of $0.0325, leaf collection, town taxes, or other service district charges, so check your notice before estimating savings. (fairfaxcounty.gov)

Whether you should appeal

Appeal if you can prove one of three Fairfax-recognized problems: fair market value, lack of uniformity, or errors in the property description. “My assessment went up too much” or “my tax bill is unaffordable” is not enough by itself. DTA specifically says residential owners should provide sales showing the assessment is above market value, or comparable assessments showing lack of uniformity. (fairfaxcounty.gov)

Start with the county’s iCare assessment site. Look up your own record and check finished area, basement, garage, condition, additions, land size, and assessment neighborhood. Then pull 2025 sales of similar homes, because the 2026 form says sales in 2025 can be considered for the January 1, 2026 assessment; 2026 sales generally apply to the next assessment year. The DTA form asks for 1 to 5 sales or uniformity comparables. (fairfaxcounty.gov)

A practical threshold: at the 2026 base rate, every $10,000 reduction saves $112 before special district taxes. Example: suppose your 2026 assessed value is $850,000, but three similar 2025 sales support $810,000. A $40,000 reduction would save ($40,000 ÷ 100) × $1.12 = $448 for the year at the base rate. If your parcel also pays stormwater, add ($40,000 ÷ 100) × $0.0325 = $13, for about $461 before any other district charges.

Fairfax publishes detailed assessment-change statistics, but I did not find an official county-published residential appeal success rate or median reduction for 2026. Do not assume appeals are automatically granted; the assessment can be affirmed, decreased, or increased. (fairfaxcounty.gov)

Step-by-step how to file

1. Talk to DTA early. Fairfax encourages owners to call 703-222-8234, email DTA, or schedule a virtual/phone appointment before filing. This is especially useful if the issue is a data error.

2. Choose the track. The first track is a DTA administrative appeal using the 2026 Real Estate Appeal Form or the residential online appeal application when open. The second track is the independent Board of Equalization of Real Estate Assessments using the 2026 Board of Equalization (BOE) Appeal Form / Application for Equalization of Real Property Assessment. A DTA appeal is not required before going to BOE. (fairfaxcounty.gov)

3. Meet the deadline. For 2026, DTA administrative appeals had to be postmarked by April 1, 2026, filed online, or emailed to DTAREDAppeals@fairfaxcounty.gov by 4:30 p.m. EDT. BOE appeals had to be postmarked by midnight June 1, 2026, or delivered, emailed, or uploaded by 4:30 p.m. EDT June 1, 2026. (fairfaxcounty.gov)

4. Send the right materials. DTA wants your reason, property facts, and 1–5 comparables. BOE requires all written evidence by the filing deadline; no new written material, slide decks, or documents are accepted at the hearing except maps or photographs. If someone files for you, include the required owner authorization. (fairfaxcounty.gov)

5. Filing methods and addresses. DTA: online for residential properties when open, email to DTAREDAppeals@fairfaxcounty.gov, mail/postmark, or deliver to Department of Tax Administration, Real Estate Division, 12000 Government Center Parkway, Suite 357, Fairfax, VA 22035. BOE: email BoardOfEqualization@fairfaxcounty.gov, mail/postmark, hand-deliver to Suite 331, or request Egnyte upload access from the BOE Clerk. Faxed BOE submissions are not accepted. No county filing fee is listed on the DTA or BOE appeal pages/forms. (fairfaxcounty.gov)

What happens after

In a DTA administrative appeal, county appraisal staff may contact you to schedule a field inspection. They can re-measure and verify the property, review your evidence and market sales, and then send the decision by mail. DTA says filing early improves the chance of receiving the result before the BOE deadline. (fairfaxcounty.gov)

BOE is more formal. Hearings for 2026 assessments begin after the July 29, 2026 informational meeting and are scheduled at the Government Center: Monday/Thursday evenings at 7 p.m. and Wednesday/Friday mornings at 9 a.m., continuing as needed through March 31, 2027. (fairfaxcounty.gov)

At the BOE hearing, witnesses are sworn. You get 10 minutes to present, DTA gets 10 minutes, and you get 5 minutes for rebuttal. If you do not appear, the BOE can hear the case in absentia based on your written record. The BOE records its decision at the hearing; if it changes the value, it orders DTA to make the change effective January 1 of the tax year. Further appeal is to Fairfax County Circuit Court. (fairfaxcounty.gov)

Keep paying tax bills on time while the appeal is pending. Fairfax says late-payment penalties and interest still apply even if you appealed. (fairfaxcounty.gov)

Local tips

Check tax relief as well as assessment value. Fairfax does not have a general Virginia-style “homestead exemption” that automatically reduces every owner-occupied home’s taxable value, but it does have major relief programs: senior or permanently disabled tax relief, tax deferral, disabled veteran or surviving spouse exemptions, killed-in-action surviving spouse exemption, first-responder surviving spouse exemption, solar equipment exemption, and land-use assessment for qualifying land. For 2026 senior/disability real estate relief, the county lists a household income ceiling of $90,000 and net asset limit of $400,000, with relief tiers from 25% to 100%. (fairfaxcounty.gov)

For Fairfax homeowners, the strongest appeal packets are local and boring: your iCare property card, photos of condition problems, a small table of 2025 neighborhood sales, and a one-page explanation of why those homes are more comparable than the county’s value implies. If your argument is uniformity, compare total assessed value per square foot of similar homes—not just land value or building value, because BOE tells appellants to focus on total value.