How to Protest Your Property Tax in Collin County, Texas

Collin County has been the single fastest-appreciating large county in Texas for most of the last decade. The cities of Plano, Frisco, McKinney, and Allen routinely lead state and national rankings for "most desirable suburb." That popularity has a tax cost: appraised values have climbed faster here than almost anywhere in the state, and the Collin Central Appraisal District (CCAD) re-assesses aggressively to keep up with the market. The good news for homeowners is that CCAD's portal is one of the better ones in Texas, the comp data is dense, and a well-prepared protest tends to succeed. This guide is the Collin County edition.

CCAD by the numbers

Collin County covers approximately 886 square miles and includes the cities of Plano (~290,000 residents and one of the largest cities in Texas), McKinney (~210,000), Frisco (mostly in Collin, ~225,000 total population shared with Denton), Allen (~110,000), Wylie (~60,000), Prosper (~40,000 and growing fast), Celina (~30,000 and growing very fast), Murphy, Anna, Melissa, Princeton, Lucas, Parker, Fairview, Lavon, and the rural unincorporated areas around Farmersville and Westminster. About 470,000 residential parcels fall under CCAD's jurisdiction in 2026, with new construction adding roughly 15,000–20,000 parcels per year.

The Texas Comptroller's biennial Property Value Study has consistently rated CCAD's appraisal methodology as compliant — meaning the state agrees the district is doing the assessment work the law requires. From a homeowner's perspective, that has two implications. First, CCAD has the data and methodology to defend their numbers; sloppy protests will not work. Second, the data is public and the methodology is documented, which gives a prepared homeowner the same tools the district uses. The protest process is a real adversarial proceeding, and CCAD is a competent counterparty.

Using the CCAD public portal

The CCAD portal at collincad.org supports the full protest workflow online. The "Property Search" function allows lookup by address, owner name, account number, or geographic ID. Once you have located your property, you can view:

• Appraisal history (10+ years for most properties)
• Improvement detail (square footage, year built, construction class, structures)
• Land detail (lot size, neighborhood code, market value)
• Active exemptions on the parcel
• Taxing-entity breakdown with rates
• Comparable sales and equity comparables (for registered account holders during protest season)

To file online and upload evidence, you must register an account on the portal and link it to your property using the account number from your appraisal notice. The registration adds a one-time identity verification step but unlocks the full online protest workflow including hearing scheduling and evidence upload.

Critical Collin County deadlines

Filing your protest, step-by-step

1Pull your CCAD record

Visit collincad.org, click "Property Search," and look up your property. Verify the square footage, year built, and any structural details (attached garage, pool, additions) are correct. CCAD's records on new construction (less than two years old) sometimes lag the actual finished home — verify before you protest on the wrong baseline. If anything is materially wrong about the property itself, the §25.25 correction process may apply separately from the protest.

2Register on the portal and file your protest online

Click "Account Login" then "Register" if you haven't already. Link your account to your property using the property account number from your appraisal notice (the notice arrives in April). Navigate to "File a Protest" or "Online Appeals" during the May–July season. Check both "Value over market" and "Unequal appraisal" grounds — there's no penalty for selecting both, and it preserves your right to argue either at the hearing.

If the portal is having issues (rare in Collin, but possible during peak May volume), the fallback options are: mail Form 50-132 to CCAD at 250 Eldorado Pkwy, McKinney, TX 75069, fax to (469) 742-9209, or email a signed PDF to protest@collincad.org. Get delivery confirmation either way.

3Pull your comparables

For Collin County properties, two comp sources matter:

• Market sales comps — recent arms-length sales of similar properties in your immediate area. Useful for "Value over market" protests.
• Equity comps (appraisal comps) — same-subdivision properties with similar square footage and year built, ranked by CCAD's per-square-foot appraised value. Useful for "Unequal appraisal" protests under §41.43(b)(3).

CCAD's portal exposes both. For master-planned communities (Stonebridge Ranch in McKinney, West Plano subdivisions like Willow Bend or Hunters Ridge, Frisco's Phillips Creek Ranch or Newman Village, Allen's Twin Creeks, Prosper's Whitley Place), use subdivision-level filters — the comp data inside a single development is usually dense enough to build a strong case without leaving the subdivision.

4Compute the median and build your packet

Sort your comp list by per-square-foot appraised value and take the median (the middle value, not the mean — median resists outliers). Multiply your square footage by the median per-square-foot to get your defensible target value. The argument: "Your CAD appraised my home at $X per square foot. The median appraisal for similar properties in my subdivision is $Y per square foot. Under §41.43(b)(3), I am entitled to be appraised at the median of comparable properties, appropriately adjusted."

Build the packet as a single PDF. Page one: a one-paragraph summary with your requested value. Pages two and three: the comp table with sources. Page four: any condition adjustments (with photos, contractor quotes, or specific defects). Upload via the CCAD portal evidence section before the hearing.

5Request CCAD's evidence packet

Under Tax Code §41.461, you are entitled to receive the CAD's evidence at least 14 days before any formal ARB hearing. The CCAD portal has a request mechanism; alternatively email protest@collincad.org directly. Most homeowners skip this step. The evidence packet typically shows the comps the CAD used and the methodology — invaluable for preparing rebuttal arguments.

6Show up to the hearing

CCAD supports in-person hearings at the 250 Eldorado Pkwy office (free parking, organized check-in), phone hearings, and video hearings via the portal. Specify your preference when filing. For first-time protestors, in-person tends to be most effective — the human element matters at the informal stage.

What to expect at the informal review and the ARB

Collin County has a two-stage process like every Texas county. Roughly 70–80% of residential protests in CCAD resolve at the informal review with a CCAD appraiser before reaching the formal ARB. The informal review is a conversation, not a hearing — there is no panel, no oath, and no formal evidence record. The appraiser has authority to settle within defined ranges based on what you present.

The formal ARB hearing is more procedurally rigorous. A three-member panel hears your case, then CCAD's case, then deliberates and issues a written determination. The Collin ARB has multiple panels operating simultaneously during peak season; expect a 15-30 minute slot. The members are local Collin County citizens, not CCAD employees, appointed by the local administrative district court — they have no incentive to side automatically with the CAD.

Practical tips specific to Collin's ARB:

• Bring a printed copy of your evidence packet for each panel member (three copies) plus one for the CCAD appraiser, even if you already uploaded electronically.
• State your requested value early and clearly. The panel is doing this 30+ times per day; brevity is appreciated and rewarded.
• Lead with the unequal-appraisal argument if your comp data is strong. The §41.43(b)(3) standard is statutorily protective and gives the ARB clean legal cover to grant a reduction.
• Don't argue tax burden, hardship, or fairness — the ARB is required by statute to consider only value, not policy. Save those arguments for your city council.

By city — Plano, McKinney, Frisco, Allen, Wylie, Prosper, Celina, Anna, Melissa

Collin County tax rates by taxing entity

A typical Collin County homeowner pays property tax to 4-6 entities, dominated by the school district. For a Plano ISD residence in the city of Plano:

Collin's overall combined rates run very close to Denton and slightly below Dallas and Tarrant — but the absolute appraised values in Plano, Frisco, Allen, and McKinney are typically higher than equivalent Tarrant or Dallas suburbs. Net dollar impact of a successful protest is usually larger in Collin than the same percentage reduction in an Arlington or Garland home.

For new Collin County homeowners

Collin County has been among the most active home-purchase markets in the U.S. through 2023–2025. If you bought your home in Collin County during that window, the homestead exemption issue is the single largest line item on your first full tax bill — and it is often missed.

Under Texas Tax Code §11.13, the residence homestead exemption applies to your primary residence. It does not transfer from the prior owner. The prior owner's exemption ends when they sell. You must file your own Form 50-114 with CCAD; the form is here. Additionally, the §23.23 10% appraised-value cap — which limits how much your taxable value can grow year-over-year — resets when the property sells, and your first full ownership year becomes the new cap base. Protesting that first-year appraisal aggressively reduces every future year's tax bill, not just the current year's. Full mechanics in our homestead exemption guide.

For a typical Plano or Frisco home purchased at $600,000–$750,000, restoring the homestead exemption is worth $3,500–$5,000 per year in tax savings — often a larger reduction than the protest itself produces. Both are worth doing; they stack.

Five Collin-specific mistakes

1. Filing with the wrong CAD on Collin/Denton or Collin/Dallas border properties

Frisco straddles Collin/Denton. Parts of Plano (south of George Bush Turnpike, generally) straddle Collin/Dallas. Coppell straddles Dallas/Denton/Collin. Always verify which CAD is assessing your specific parcel on the appraisal notice before filing. Filing with the wrong CAD wastes the deadline and is not curable — the protest must be timely filed with the correct CAD.

2. Using city-wide or county-wide comparables in master-planned communities

Plano, McKinney, Frisco, Allen, and Prosper each have dozens of distinct master-planned developments with their own consistent valuation patterns. A Stonebridge Ranch comp is rarely useful for a Hunters Ridge protest; a Phillips Creek Ranch comp is not interchangeable with a Newman Village comp. Stay within your specific subdivision unless you have a defensible reason to look wider.

3. Ignoring the homestead audit because "everything's new construction here"

Even on new construction, the homestead exemption applies to you specifically. If you bought from a builder (closed in 2024 or 2025), the builder didn't have a homestead exemption on the property (builder inventory isn't anyone's primary residence). You must file your own application — it is not "carried over" because there was nothing to carry. This is the single most common Collin County miss.

4. Skipping iSettle and going straight to the formal ARB

CCAD's iSettle online settlement option resolves many residential protests in days, not months, when the evidence is straightforward. There is no penalty for using iSettle first; if your counter-offer is declined, you proceed to the regular hearing path with no loss of rights. Use it. The cost is one button-click on the portal.

5. Not requesting CCAD's evidence packet

The §41.461 right to CCAD's evidence packet at least 14 days before any formal ARB hearing is one of the most underused tools in the Texas protest process. Many Collin County homeowners walk into the formal hearing without seeing what comps the CAD will use to defend their value. Request the packet. The portal makes this easy; do it.

FAQ — Collin County edition

Is the CCAD portal reliable?

Generally yes — CCAD's portal is among the better-maintained CAD portals in Texas. Peak May volume occasionally produces brief slowdowns but the system has not had a sustained outage in recent protest seasons. If the portal is unresponsive when you need to file, email protest@collincad.org with Form 50-132 attached and your property account number in the subject line.

Can I protest if I just bought the property in 2025?

Yes. The new owner has full protest rights for the current tax year. In fact, protesting the first-year appraisal aggressively is particularly valuable for new owners because the §23.23 homestead cap base resets at sale — a lower first-year appraisal lowers your tax base for every year you own the property going forward, not just year one.

Does CCAD let me appeal beyond the ARB if I disagree with their determination?

Yes. Under Tax Code §42.01 you may appeal an ARB determination to state district court in Collin County, to the State Office of Administrative Hearings (SOAH) for certain property types, or to binding arbitration under Chapter 41A for residential properties under $5,000,000. Each route has its own deadline (typically 60 days from the ARB determination) and procedural rules. Most residential homeowners do not appeal beyond the ARB; for higher-value properties or strong cases that the ARB rejected, arbitration is worth investigating.

Are there any Collin-County-specific exemptions I should know about?

Collin County offers an "over-65" exemption and a disability exemption beyond the standard homestead, both of which freeze the school-district taxes once approved. The City of Plano, City of McKinney, City of Frisco, and Collin County each offer their own optional local-option homestead exemption percentages on top of the state-mandated baseline. Verify on the CCAD record that you are receiving everything you qualify for.

How long does a Collin County protest take from start to finish?

From filing in early May to receiving a final ARB determination, expect 6–10 weeks. iSettle resolutions can close in days. Informal-review settlements (when an appraiser agrees to your number before formal hearing) typically close in 2–4 weeks. Formal ARB hearings run later in the season, generally June through August.