Property Tax Protest FAQ
Reviewed by RedTools Research Team, real estate analytics and property tax protest specialists.
Last updated: April 30, 2026
Everything you need to know about protesting your property taxes, from filing deadlines and required evidence to how much you could save.
What is a property tax protest?
A property tax protest (also called an appeal or grievance) is a formal process where you challenge the assessed value of your property. Every homeowner has the legal right to dispute their assessment if they believe it is higher than their property’s actual market value. The process varies by state and county but generally involves filing paperwork, providing evidence of comparable sales, and presenting your case to a review board.
How do I know if my property is over-assessed?
Compare your assessed value to recent sale prices of similar homes in your area. If comparable properties have sold for less than your assessed value, you’re likely over-assessed. You can also check whether your assessment increased significantly more than the local market average. FairValue automates this analysis by comparing your home against the best available comparable sales data.
What are comparable sales (comps)?
Comparable sales, or comps, are recently sold properties that are similar to yours in size, location, age, and condition. Appraisal districts use comps to determine your home’s market value, and you can use them to argue for a lower assessment. The best comps are within 1 mile of your home, sold within the last 12 months, and within 20% of your home’s square footage.
When is the deadline to file a property tax protest?
Deadlines vary by state and jurisdiction. In Texas, the deadline is typically May 15 or 30 days after you receive your assessment notice, whichever is later. California allows protests until November 30. Florida gives 25 days after the TRIM notice. Always check with your local appraisal district or tax assessor’s office for your specific deadline, as missing it means waiting another year.
Do I need a lawyer or tax consultant to protest?
No. Homeowners can and frequently do protest their property taxes successfully on their own. The key is having good comparable sales data and a clear, organized presentation. While professional tax consultants can be helpful, they typically charge $300–$500 or take 30–40% of your savings. Tools like FairValue provide the same quality of data and analysis for a fraction of the cost.
How much can I save by protesting my property taxes?
Savings vary widely depending on how over-assessed your property is and your local tax rate. A $30,000 reduction in assessed value with a 2.5% tax rate saves $750 per year. In high-tax states like Texas or New Jersey, the savings can be substantially higher. On average, successful protests result in a 10–15% reduction in assessed value.
What evidence do I need for a property tax protest?
The strongest evidence includes: (1) comparable sales showing properties similar to yours sold for less than your assessed value, (2) photos documenting condition issues or problems that affect value, (3) documentation of any factual errors in your assessment (wrong square footage, bedroom count, etc.), and (4) a clear protest letter summarizing your argument with a specific requested value.
How does FairValue help with property tax protests?
FairValue automates the most time-consuming parts of the protest process. Enter your address, confirm your property details, and FairValue identifies the strongest comparable sales in your area, calculates your fair market value, and generates a professional protest letter — the same quality of work that tax consultants charge hundreds of dollars to produce. The comp data is free; the custom protest letter is available for a small fee.
What if my protest is denied?
If your initial protest is denied, you typically have additional options. Most states allow you to request a formal hearing before the appraisal review board, pursue binding arbitration, or file an appeal in district court. The specific escalation path depends on your jurisdiction. Many homeowners succeed on their second attempt with stronger evidence or better-selected comps.
Can I protest my property taxes every year?
Yes. You can and should review your assessment every year and protest if you believe it’s too high. Property values fluctuate, and your assessment should reflect current market conditions. Even if you received a reduction last year, your value may have been increased again. Annual review is a smart financial practice for any homeowner.
Is there a fee to file a property tax protest?
In most jurisdictions, filing a property tax protest is completely free. There is no government filing fee to challenge your assessment. The only costs involved are your time and any tools or professional help you choose to use. This makes protesting one of the highest-return financial actions a homeowner can take.
What is the difference between market value and assessed value?
Market value is what your property would sell for in an open, competitive transaction between a willing buyer and seller. Assessed value is what your local appraisal district says your property is worth for tax purposes. These two numbers should be close, but assessed values often lag behind or diverge from actual market conditions, which is why protests exist.
Official References
- Texas Comptroller — Property Tax Assistance
- California State Board of Equalization — Property Taxes
- Florida Department of Revenue — Property Tax Oversight
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