Travis Bunn
Founder, AppealDesk · Published March 21, 2026
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Updated March 2026
Collin County is one of the wealthiest and fastest-growing counties in Texas, with a population now exceeding 1.1 million. The county stretches from the established suburbs of Plano and Allen through the booming corridors of Frisco and McKinney, and it has become a magnet for corporate headquarters, Toyota, PGA of America, Keurig Dr Pepper, and a wave of tech companies have relocated here, driving demand for housing and pushing home values steadily upward.
With a median home value around $400,000 (and many neighborhoods well above that), property taxes in Collin County represent a serious annual expense. The Collin Central Appraisal District (CCAD) appraises every property in the county, and their mass appraisal models have struggled to keep pace with the county’s diverse micro-markets. The result: many homeowners receive appraised values that overshoot what their home would actually sell for.
The good news is that protesting your property tax appraisal in Collin County is straightforward, free to file, and effective. Across Texas, most homeowners who protest with evidence receive some reduction, per the Comptroller's annual appraisal district outcomes. This guide covers everything you need to file a successful protest with CCAD in 2026.
CCAD is responsible for determining the appraised value of all real and personal property in Collin County. Like all Texas appraisal districts, CCAD is required to appraise properties at 100% of market value as of January 1 each year. The district does not set tax rates, that is done by individual taxing entities such as school districts (Plano ISD, Frisco ISD, McKinney ISD, Allen ISD, Prosper ISD, and others), cities, and special districts.
Collin County’s strong school districts are one of the primary drivers of home values here. Homes within Frisco ISD and Prosper ISD boundaries, for example, command premiums that CCAD incorporates into their valuations. However, school district quality is already reflected in sale prices, so if CCAD is appraising your home above what comparable homes actually sell for, you have grounds to protest regardless of which district you are in.
CCAD mails Notices of Appraised Value in April. When your notice arrives, compare the new appraised value to what your home would realistically sell for on the open market. If the appraised value is higher, you should protest. For CCAD contact details and office information, see the Collin County data page.
Your deadline to file a protest with CCAD is May 15, 2026, or 30 days after the date your notice was mailed, whichever is later. The mailing date is printed on your Notice of Appraised Value. If your notice was mailed on April 25, your deadline extends to May 25.
File as soon as you receive your notice. This ensures you do not miss the deadline and gives you the best selection of hearing times. CCAD’s system can slow down in the days before May 15 as volume spikes.
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CCAD provides three filing methods. Online filing is the most efficient and gives you immediate confirmation.
CCAD’s online protest system allows you to file your protest, choose your reason for protesting, and upload supporting evidence. You will need your property account number (printed on your notice) and an email address. The system generates a confirmation number, save it. You can also track the status of your protest online after filing.
Download and complete Form 50-132 (Notice of Protest) and mail it to CCAD. The form must be postmarked by your deadline. Use certified mail with return receipt for proof of timely filing. The mailing address is available on the Collin County data page.
Bring your completed Form 50-132 to the CCAD office during business hours. Ask for a stamped copy as your receipt. Visit the Collin County data page for current office hours and location.
The protest form asks you to select at least one reason. For residential homeowners in Collin County, the two strongest options are:
Select both. There is no penalty for checking both boxes, and it gives you two independent paths to a reduction. In Collin County, unequal appraisal arguments are particularly strong because CCAD’s rapid reappraisals frequently create significant per-square-foot disparities between similar homes on the same street.
Evidence wins protests. In Collin County, the ARB panel sees thousands of cases each year. They respond to organized, data-driven presentations, not emotions or complaints about tax rates. Here is what you need:
Identify 3–5 properties similar to yours that sold within the past 12 months for less than your appraised value. The best comps will share:
Collin County’s housing stock varies dramatically by micro-market. A comp in Prosper’s new master-planned communities is not relevant if your home is in an older Plano neighborhood like Deerfield or Ridgeview Ranch. Similarly, a home in McKinney’s historic downtown trades at a very different per-square-foot rate than a home in the Tucker Hill development. Match your comps as narrowly as possible. For detailed guidance, see How to Find Comparable Sales for Your Property Tax Protest.
Under Texas Property Tax Code Section 41.43(b)(3), you can protest on the grounds that your home is appraised at a higher level relative to comparable properties. To build this argument:
This argument is especially effective in Collin County’s fast-growing cities. In Frisco, for example, CCAD may have reappraised one side of a development but not the other, creating artificial inequity between identical floor plans built by the same builder. In Allen, older sections of the same subdivision may be assessed very differently from newer phases.
If your home has physical issues that reduce its value below what CCAD has assessed, document them:
Bring dated photographs and, if available, contractor repair estimates. If CCAD’s records show incorrect property details (for example, listing your home as having a third bathroom that does not exist), this is one of the easiest protests to win because you are correcting a factual error.
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After filing, CCAD schedules your protest through a two-stage process. Understanding both stages helps you prepare and manage your time.
CCAD assigns a staff appraiser to review your protest. You will meet (by phone, video, or in person) to discuss the evidence on both sides. This is a negotiation, not a trial. The appraiser has settlement authority and can offer a reduced value on the spot.
If informal negotiations do not produce a satisfactory result, your case is heard by the Appraisal Review Board. The ARB is a panel of local citizen volunteers who hear evidence from both you and CCAD, then issue a binding decision.
If you disagree with the ARB’s decision, Texas law provides further options: binding arbitration (for homes valued under $5 million) or filing suit in district court. Most homeowners find the informal or ARB stage resolves their protest.
Texas homeowners who protest their property tax appraisals win reductions approximately 70% of the time statewide. Collin County results are consistent with that figure, and homeowners who present organized evidence, particularly comparable sales and unequal appraisal data, succeed at even higher rates.
The financial impact in Collin County is significant. On a $400,000 home with a combined tax rate around 2.1%, a 10% reduction saves approximately $840 per year. On a $600,000 home in Frisco or Prosper, that same percentage saves over $1,260 annually. These savings carry forward because your new value becomes the baseline for subsequent years (subject to the 10% homestead cap).
For more on statewide statistics, see our property tax appeal statistics breakdown. For cost considerations, read What Does a Property Tax Appeal Cost?
Exemptions reduce your taxable value before tax rates are applied. Make sure you are claiming everything you are entitled to, exemptions and protests work together for maximum savings.
Exemptions must be applied for through CCAD and are separate from the protest process. If you recently turned 65 or acquired a disability rating, check whether you have filed the appropriate exemption application. For more information, see our complete property tax exemptions guide.
Collin County’s rapid growth means the real estate landscape varies significantly by city and neighborhood. Tailoring your protest evidence to your specific market is key.
As the most established city in Collin County, Plano has a mature housing stock that ranges from 1970s-era ranch homes in west Plano to newer developments along the Dallas North Tollway. CCAD sometimes overvalues older Plano homes by applying appreciation rates driven by new construction or Legacy West-area demand. If you own a home in an older Plano neighborhood, find comps within your section of Plano rather than accepting CCAD’s broader comparisons. A 1985 home in Plano’s Deerfield neighborhood should not be valued like a 2015 home near Shops at Legacy.
Frisco has been one of the fastest-growing cities in the nation, with master-planned communities like Phillips Creek Ranch, Starwood, and Lawler Park constantly absorbing new inventory. CCAD frequently bases appraised values on the most recent new-construction sale prices, which can overstate the value of homes built even two or three years earlier. If your Frisco home has been lived in, compare it to resale transactions, not builder closings. The PGA headquarters area and Frisco Station developments also create localized value bumps that should not be applied to homes miles away.
McKinney’s historic downtown has driven premium pricing in surrounding neighborhoods, but that premium diminishes quickly as you move toward the city’s outer growth rings. CCAD may not adequately distinguish between the walkable downtown-adjacent areas and the more suburban developments further east and north. If your McKinney home is outside the historic core, make sure your comps reflect your actual location and amenities, not the downtown halo effect.
Allen offers mid-range to upper-mid-range housing with strong school district backing (Allen ISD). CCAD’s valuations here tend to be aggressive because buyer demand keeps prices firm. Focus on finding sales that closed slightly below list price or comps with features your home lacks (pool, larger lot, updated finishes). Prosper, meanwhile, is experiencing explosive growth with new luxury developments. If you bought early in a Prosper development, the homes closing now at higher prices may be larger models or upgraded specs, make sure CCAD is comparing apples to apples, not your base model to a buyer’s fully upgraded version.
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