AppealHarbor Jurisdiction Fairfax County, VA Tax year 2026 Reviewed 2026-08-02

"My taxes went up too much" is not a legal ground

Last reviewed 2026-08-02, against the county's 2026 appeal forms and the current Virginia Code. The 2027 forms and dates have not been published yet.

Your assessment went up. The bill that follows will be larger, by an amount you did not plan for and did not agree to.

That is a real thing to be annoyed about, and this page is not going to tell you otherwise.

It is going to tell you something less satisfying: an appeal is not the mechanism for it. The appeal process tests one narrow question, and "this went up more than I can absorb" is not that question. Knowing that now saves you the weeks it takes to find out the slow way.

In 30 seconds:

  • The county states directly that the size of an increase is not a basis for appeal.
  • An appeal tests whether the value is right — not whether the increase was large, and not whether the bill is affordable.
  • There are three actual grounds, and a large increase is not one of them.
  • A large increase is still a good reason to check. It is just not a case by itself.
  • You can require the county to explain the increase to you in writing.
  • If the value is defensible and the bill is still too high, the lever is the tax rate, and that is set somewhere else.

Fairfax County only. The City of Fairfax and the City of Falls Church assess separately, run their own appeal processes, and set their own deadlines — including deadlines that differ from the county's. If your tax bill comes from one of those cities, this page does not apply to you.

The county says it in its own words

This is not our interpretation. It is printed on the county's own paperwork.

The 2026 administrative appeal form states at the top that financial impact and the rate of value change are not sufficient grounds for appeal.

The county's appeals page puts it the same way: simply saying the increase in value is too much in a single year is not a legal basis for an appeal.

So an appeal that says "this went up 12% and that is unreasonable" is answering a question nobody asked.

Why the size of the increase does not count

An assessment appeal asks one thing: is this the right value?

Not "is this a fair amount to pay." Not "did this rise faster than my income." Whether your property was worth what the county says it was worth on January 1.

Two consequences follow, and both feel counterintuitive.

A large increase can be entirely correct. If your property really did gain that much value, the assessment reflecting it is doing its job. Unwelcome and accurate are not opposites.

A small increase can be wrong. If your property was over-assessed last year and went up 2%, it is still over-assessed. The change is not the thing being tested.

The same logic covers the split between land and building value. The county states that uniformity is a function of the total assessed value, and that large increases in land or improvement value are not errors so long as the total is uniform as measured by market evidence. A land value that jumped while the building value sat still is not, on its own, an error.

What actually counts

Both county forms list three grounds, and you have to select at least one.

Fair market value. The property is assessed at more than it was worth. This is the ground comparable sales support.

Lack of uniformity. The assessment is out of line generally with similar properties — a pattern across comparable homes, not one neighbor with a lower number.

Errors in property description. The county's record of your property is factually wrong — lot size, square footage, condition, flood plain, topography, zoning.

Notice what none of them mention: the amount of the increase, the size of the bill, or what you can afford.

A large increase is a reason to check

Here is the useful version of the instinct that brought you here.

A big jump does not prove anything is wrong. But it is a sensible prompt to go and look, because the things that are grounds can be checked directly — against the county's own record, and against what actually sold.

Start with the county's file on your property. Square footage, bathroom count, basement finish, year built. If the description is wrong, the value built on it may be wrong too — and that is a ground with its own checkbox. How to check your property record for errors walks through it.

Then look at what actually sold. Not estimates from real estate websites — recorded sales of properties genuinely like yours, closed early enough to count. Which comparable sales the county will accept covers which ones qualify.

If either of those turns up something, you have a real ground. If neither does, you have saved yourself an appeal that was going to fail.

You can make the county explain it

This part speaks directly to the frustration, and it does not require filing anything.

Under Va. Code §58.1-3331(C), on request from a taxpayer whose property has been assessed, the assessing officer must provide a written explanation or justification for an increase in the property's assessed value.

You do not have to file an appeal to ask. The same section also lets you see the appraisal card, the working papers, and the list of comparable properties or sales figures the county considered.

So "why did this go up so much" is a question you are entitled to have answered in writing, by the office that raised it. Your right to see the county's own numbers explains how to ask.

If the value is right and the bill is still too high

Then the problem is not the assessment, and no appeal will fix it. Two other things might.

The tax rate is set separately. Your bill is the assessed value multiplied by a rate, and the Board of Supervisors adopts that rate each spring through the county budget process, which includes public hearings. That is where the rate is decided — not at the Board of Equalization (the independent county board that hears assessment appeals).

Relief programs exist. The county runs tax relief for seniors, people with disabilities, and certain veterans, and they are separately underclaimed. If affordability is the real issue, relief you may already qualify for is a better use of an afternoon than an appeal.

Being told you have no case is not a satisfying answer. It is a cheaper one than finding out in June, and it is the same answer we would give a paying customer.

How to appeal your Fairfax County assessment covers the process if you do find a ground. Reading your assessment notice explains what the figures on it mean.

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