Collin County Property Tax Protest: How to Do It Yourself
If your Collin Central Appraisal District/CCAD notice shows a value that feels too high, you can protest it — free, on your own, without paying a company a cut of your savings. The process runs through CCAD and an independent Appraisal Review Board/ARB, and most homeowners can work through it start to finish in a few hours. This guide covers exactly what to do in Collin County.
Who Sets Your Value: CCAD and the ARB
The Collin Central Appraisal District appraises every property in Collin County for tax purposes. CCAD does not collect taxes — it sets the assessed value that cities, school districts, and other taxing units use to calculate your bill. When you protest, you are challenging CCAD's number before the Appraisal Review Board, an independent panel that is not part of CCAD. The ARB weighs your evidence against CCAD's and decides.
The Protest Deadline — Confirm It Before Anything Else
Texas law generally gives homeowners until May 15 or 30 days after CCAD mailed your Notice of Appraised Value — whichever is later. Miss that window and you lose the right to protest for the current year; there is no grace period. Check the exact current deadline at collincad.org as soon as your notice arrives. Do not rely on a prior year's date — deadlines are year-specific.
Two Grounds Worth Filing On
You need a legal ground — a stated reason — to protest. Two cover the vast majority of successful residential protests in Collin County, and you can check both on the same form at no extra cost.
- Market value: CCAD's appraised value exceeds what your home would realistically sell for today. You back this up with recent comparable sales — similar homes nearby that closed for less than CCAD's figure. For more on this ground, see Property Tax Protest Travis County.
- Unequal appraisal (equity): your home is assessed at a higher ratio to market value than comparable properties nearby. Texas is one of the few states where this uniformity argument alone can produce a reduction. For how this ground works in neighboring districts, see Property Tax Protest Travis County and Property Tax Protest Dallas Texas.
Most Collin County homeowners file on both grounds simultaneously. CCAD's online portal lets you view the comparables CCAD used when setting your value, which can reveal inconsistencies before you submit.
How to File Your Protest With CCAD
CCAD accepts protests online through its e-file portal at collincad.org, by mail using Form 50-132 (Notice of Protest), and in person at the CCAD office in McKinney. Online is fastest and gives you a timestamped confirmation — keep it. State your grounds (market value, unequal appraisal, or both) when you file. You do not need to attach evidence at this stage; bring it to the hearing.
After filing, CCAD may send an informal settlement offer before your ARB date — many protests resolve here without a formal hearing. If you reject the offer, your case moves to a formal ARB hearing (typically 15–30 minutes) where both sides present evidence. For how informal settlements work in other districts, see Denton County Property Tax Protest.
Evidence That Moves the ARB
Print everything — the ARB panel will not scroll through your phone. Collin County's rapid growth in cities like Frisco, McKinney, and Prosper means CCAD's mass-appraisal models can miss property-specific details that hurt your value.
- Three to five comparable sales from the past 12 months: similar square footage, lot size, age, and condition, in your subdivision or close to it, that sold below CCAD's appraised value. For comparable-sale strategy in neighboring counties, see Property Tax Protest Williamson County and Denton County Property Tax Protest.
- Appraised value per square foot for neighboring properties pulled from CCAD's public records — showing yours is higher — to support an unequal-appraisal argument. See also Denton County Property Tax Protest for how this evidence type works across districts.
- Photos or repair estimates documenting condition problems CCAD may not have on file: foundation movement, roof damage, drainage issues, or outdated systems.
- A recent independent appraisal from a refinance or purchase — it carries real weight with the ARB panel as a licensed professional's opinion of value.
Strong, nearby comparable sales are the most reliable path to a lower value. A reduction is not guaranteed — it depends on how your evidence lines up with CCAD's data and the ARB's judgment. See Brazoria County Property Tax Protest for additional comparable-sale guidance.
Protesting in Neighboring Texas Counties
The same ARB framework applies across Texas, but each appraisal district has its own portal, informal-hearing procedures, and filing steps. If you own property elsewhere in North Texas, see the guides for Denton County property tax protest and Dallas County property tax protest — the grounds are the same, but district-specific details differ. For the broader Texas protest framework, the Tarrant County property tax protest guide also walks through how informal settlements and ARB hearings work.