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Collin County, Texas

How to Appeal Property Taxes in Collin County (2026)

Appeal Deadline

May 15 (or 30 days after notice date, whichever is later)

County AssessorAppeal Forms

Overview

Collin County, home to Plano, Frisco, McKinney, and Allen, is one of the fastest-growing counties in Texas with approximately 400,000 parcels. The Collin Central Appraisal District (CCAD) reassesses every property annually, and with the DFW metro's rapid growth, many homeowners see significant year-over-year increases. Collin County's Appraisal Review Board (collinarb.org) operates independently and provides a straightforward protest process — most cases are resolved at the informal hearing stage.

Step-by-Step Appeal Process

1

Receive your Notice of Appraised Value from CCAD (typically mailed around April 15)

2

Review your property details for errors (square footage, bedrooms, condition, lot size)

3

File your protest online at onlineportal.collincad.org (Owner ID + eFile PIN required), by mail, or via the 24/7 drop box at 250 Eldorado Parkway, McKinney before May 15 (or 30 days after notice date)

4

Gather evidence: comparable sales, photos of property condition issues, independent appraisal

5

Attend an informal hearing with a CCAD appraiser (most protests are resolved here)

6

If not resolved, attend a formal ARB hearing — each party gets 5 minutes to present evidence

7

If you disagree with the ARB decision, you can pursue binding arbitration (properties valued at $5M or less) or district court within 60 days

What Evidence Do You Need?

3-5 comparable sales within 1-2 miles, sold within the last 12 months
Photos showing property condition issues (deferred maintenance, foundation issues, etc.)
Independent appraisal from a licensed appraiser
Repair estimates for any significant issues
Evidence of unequal appraisal (neighbors with similar homes appraised lower)

Common Reasons for Successful Appeals

Comparable sales show a lower market value than the assessed value
Rapid DFW growth has led CCAD to over-apply area-wide increases to individual properties
Property condition issues not reflected in the assessment (foundation problems, roof damage, etc.)
Incorrect property details (wrong square footage, bedroom count, or lot size)
Unequal appraisal compared to similar neighboring properties
New construction neighborhoods where initial assessments are set too high

Tips for Success

1File your protest even if you plan to negotiate informally — you must file to preserve your rights
2CCAD's online Taxpayer Portal at onlineportal.collincad.org is the fastest filing method — have your Owner ID and eFile PIN ready from your appraisal notice
3The informal hearing is your best chance for a quick resolution — come organized with printed evidence
4CCAD only requires 1 copy of evidence for scanning (or a USB drive with PDF/images, max 20MB)
5Fax and email are NOT accepted for filing protests — use online, mail, or the drop box
6You can request a phone or video hearing instead of in-person — submit the request at least 10 days before your hearing date
7If you miss your hearing, you have 4 business days to request reconsideration with good cause

Frequently Asked Questions

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This guide is for informational purposes only and does not constitute legal advice. Deadlines and procedures may change. Always verify current information with your county assessor.