Can you reduce your Collin County property tax appraisal if you believe it’s overvalued?

Yes. In 2026, Collin County homeowners can appeal overvalued appraisals before the May 15 deadline by filing a formal protest with the Collin Central Appraisal District (CCAD), gathering comparable sales evidence, and presenting at an informal hearing or ARB hearing. Success rates range from 52–84%, with average reductions of $25,000+ in appraised value.

Collin County is experiencing a unique market paradox in 2026. The county’s median home values have fallen 6.1% year-over-year—the steepest decline the county has recorded in decades. Yet many homeowners are still receiving Notice of Appraised Value notices showing assessments equal to or higher than 2025 levels.

This disconnect between falling market values and static or rising appraisals creates a rare, time-limited opportunity. The Collin Central Appraisal District’s mass appraisal model—which uses algorithms to estimate property values across thousands of homes—has lagged behind the actual market correction. Homes in Frisco, McKinney, Plano, and surrounding areas are appraised based on outdated comparable sales data and market assumptions that no longer reflect 2026 reality.

For a homeowner receiving a $650,000 appraisal on a home that would sell for $620,000 today, this difference translates to approximately $1,500–$2,000 annually in excess property taxes. Over a 10-year period, that’s $15,000–$20,000 in unnecessary tax payments.

The Collin Central Appraisal District mails Notice of Appraised Value notices in April. Homeowners have until May 15, 2026, or 30 days from their appraisal notice date (whichever is later) to file a formal protest. This creates a compressed timeline, but the process is straightforward, free to file, and highly effective when executed correctly.

The Collin Central Appraisal District appraises nearly 500,000 properties across the county. To manage this volume, they employ a mass appraisal model—essentially a computerized valuation system that estimates property values based on comparable sales data, property characteristics (lot size, age, square footage, condition), and neighborhood trends.

CCAD’s system struggles with the 2026 market because: (1) Lagged comparable sales data using a 6–12 month rolling window misses the steepest correction; (2) Overgeneralization of neighborhood trends groups diverse properties together; (3) Condition adjustments fail to account for sudden market shifts where deferred maintenance now costs 30% in value, not 10%.

This is precisely the scenario that makes property tax appeals winnable.

Step 1: Gather Your Notice of Appraised Value – CCAD mailed these in April. Call (469) 205-2000 if yours is missing.

Step 2: File Your Notice of Protest Online – Visit collincad.org, navigate to “File a Protest,” enter your PIN, select your protest reason (“Unequal Appraisal” or “Incorrect Market Value”), indicate your hearing preference, and submit. The filing fee is $0.

Step 3: Receive Your Hearing Date – CCAD sends email confirmation within 3–5 business days with your hearing date. Informal hearings typically occur in late May or June.

The single most effective evidence in a property tax appeal is recent comparable sales—homes similar to yours that sold at prices lower than your appraised value.

CCAD’s appraisers and the Appraisal Review Board are required by law to use the “market approach” to valuation. This means they must consider what similar homes are actually selling for in the current market.

A strong comparable is a home that sold in your county within the last 90 days (ideally 60 days) that is similar to your property: same neighborhood, similar lot size (within 15%), similar square footage (within 10%), similar age (within 5–10 years), similar condition, and similar features (garage, pool, patio, finishes).

For a $650,000 home in Frisco, an ideal comparable would be a 4-bedroom, 3-bath, 2,800–3,200 sq ft home in the same or adjacent subdivision that sold for $595,000–$625,000 in April-June 2026.

Where to find comparables:

Collect 3–5 strong comparables and create a spreadsheet showing address, sale price, sale date, square footage, lot size, year built, key features, and how it compares to your home. Include MLS listing pages or deed records showing sale prices.

If your home’s appraised value is $650,000, but three recent comparables in your neighborhood sold for $595,000, $610,000, and $615,000, you have a strong case for an appraisal reduction to approximately $615,000.

After filing a protest, most homeowners are offered an informal hearing with a CCAD appraiser. This is not a courtroom proceeding—it’s a review meeting with the goal of resolving the protest without formal arbitration.

In the informal hearing (typically phone or video): The CCAD appraiser explains the basis for the current appraisal; the homeowner presents comparable sales evidence; both parties discuss the market value discrepancy; the appraiser decides whether to adjust downward, upward, or leave it unchanged.

The appraiser has authority to make reasonable adjustments at the informal stage. If your comparables are strong and clearly demonstrate a lower market value, many appraisers will approve a downward adjustment right then.

Preparing for the informal hearing: Bring 3–5 printed copies of your comparable sales analysis; highlight key data points (sale prices, dates, square footage, lot sizes); prepare a one-page summary showing your home’s appraised value vs. average sale price of comparables; be respectful and factual; stick to market data and avoid emotional arguments.

If the appraiser agrees to a reduction at this stage, the new appraisal becomes official and your property taxes will be recalculated based on the lower value.

If the informal hearing does not result in an acceptable adjustment, homeowners can request a formal Appraisal Review Board (ARB) hearing.

The ARB is an independent panel, typically consisting of 1–3 appointed members who are not CCAD employees. They review both the homeowner’s evidence and the appraiser’s evidence, then issue a binding decision on the property’s appraised value.

ARB hearings are more formal than informal reviews. Homeowners may present evidence, call witnesses (e.g., a real estate agent or appraiser), and make oral arguments. The appraiser also presents their case.

Collin County’s ARB approved reductions in approximately 52% of contested appeals in recent years, with an average reduction of $25,624 in appraised value. This is a meaningful success rate, especially considering that homeowners pay nothing to appeal.

When to hire representation for an ARB hearing: For properties under $500,000 with clear comparable sales evidence, homeowners often succeed at the informal hearing stage without professional help. For properties over $500,000, properties in complex neighborhoods, or situations where the homeowner is unfamiliar with appraisal methodology, hiring a property tax professional increases success rates to 65–75%.

Across Collin County in 2026, certain categories of properties are winning appeals at higher rates:

Newly built homes in mature subdivisions: New construction in established neighborhoods where older comparable sales set lower benchmarks. Example: $550,000 new home in Frisco subdivision where homes from 2016–2018 sold for $480,000–$520,000.

Homes with deferred maintenance: Homes that have not been updated appeal successfully when comparables show updated homes sold for less. Example: $600,000 home with original 1995 kitchen, end-of-life roof, original HVAC.

Properties affected by market transition: Homes at neighborhood transition zones. Example: McKinney home appraised at $495,000 when recent comps sold for $465,000–$475,000.

Homes with condition issues: Homes with foundation settling, water damage, roof issues, or power line proximity succeed when comparables account for factors.

Luxury properties in standardized zones: High-end homes sometimes fail recognition. Example: $2.2M luxury home in Frisco appraised at $2.4M because model isn’t capturing distinction between standard and custom estates.

In 2026, properties across Collin County—particularly in Frisco, McKinney, Plano, and Prosper—are winning appeals at rates 15–25% higher than historical averages.

The Collin County property tax appeal process follows this timeline:

April: Notice of Appraised Value mailed to all property owners
April 15–May 15: Homeowners file protests (30-day window from appraisal notice)
Late May–June: Informal hearings scheduled and conducted
July–August: Informal hearing decisions rendered; ARB appeals filed if needed
August–September: ARB hearings conducted
October 1: New appraisal values take effect for 2026 tax year

Success rates vary by appeal type:

Average reductions range from $8,000 (homes appraised under $300,000) to $35,000+ (homes appraised over $1M).

For a homeowner in a $600,000 home with an effective property tax rate of 2.2%, a $25,000 reduction in appraised value translates to approximately $550 in annual tax savings—$5,500 over a decade.

Many homeowners successfully file and win property tax appeals without professional help, particularly for properties under $500,000 with straightforward comparable sales evidence.

However, hiring a property tax professional or real estate appraiser makes sense when:

Professional property tax specialists typically charge $300–$800 for a complete appeal package (evidence gathering, hearing preparation, and representation). Some work on contingency, charging only if the appeal succeeds.

For most Collin County homeowners, the DIY approach is financially sensible because CCAD’s informal hearing process is designed to be accessible without legal representation.

Can you reduce your Collin County property tax appraisal? Yes. Should you file an appeal if your appraised value seems high? Probably. Will you win? The data suggests 65–70% of homeowners who file an appeal receive some reduction.

The 2026 market environment—with a 6.1% year-over-year decline in median values and a lagging appraisal system—creates a rare window of opportunity. Homeowners who gather strong comparable sales evidence and present it before the May 15 deadline have substantially better odds of success than in past years.

The process is free to file, takes 15–30 minutes online, and requires no legal expertise to navigate the informal hearing. For homeowners who suspect their appraisal is too high, filing a protest is a no-lose decision.

The only cost of not appealing is continued overpayment of property taxes on an inflated appraisal. For a $650,000 home where the actual market value is $620,000, that cost compounds annually and across multiple years.

Ready to reduce your Collin County property tax appraisal? Selden Tual, top 1.5% luxury real estate agent at Compass, has guided dozens of Dallas homeowners through successful property tax appeals using market analysis and comparable sales evidence. Schedule a consultation at https://seldentual.com/contact/ or call/text 512.944.3121 to discuss your property’s current appraisal and appeal strategy.