Texas6 min readJune 27, 2026Updated October 18, 2026
Grayson County Texas Property Tax Protest Guide 2027
Grayson County property tax protest guide 2027. Sherman, Denison, and Gunter homeowners: file your GCAD protest before May 15. TaxAppeal USA: $89 ready-to-sign kit.
Grayson County sits at the northern edge of the Dallas-Fort Worth metro, immediately south of the Red River and Oklahoma border. Sherman and Denison — the county's anchor cities — have experienced extraordinary growth as major corporate relocations brought thousands of jobs to the region. Texas Instruments and GlobiTech announced massive semiconductor manufacturing investments in Sherman in 2021-2022, setting off one of the most dramatic suburban growth stories in recent Texas history. This corporate-driven demand spike pushed Grayson County property values to levels that have since moderated as the initial frenzy cooled. The Grayson Central Appraisal District (GCAD) assessments still reflect peak values in many areas. The 2027 protest deadline is May 17, 2027.
Grayson County Market and Assessment Patterns
The Texas Instruments semiconductor plant announcement in Sherman triggered one of the most dramatic short-term real estate appreciation spikes seen anywhere in Texas. Investors and relocating workers drove up prices rapidly, and the Grayson CAD assessments tracked this appreciation aggressively. Since the initial rush, the market has normalized — but many assessments still reflect peak speculative values rather than current transaction prices.
✓Sherman: Corporate boom city; rapid appreciation followed by normalization; assessments often above current resale values
✓Denison: Historic border town with more stable residential market; over-assessments at upper price points
✓Gunter/Howe: Fast-growing outer suburbs now within DFW commuting range; new construction moderating resale prices
✓Pottsboro/Van Alstyne: Growing communities attracting DFW outmigration; new development adding inventory
✓Rural north Grayson: Agricultural and rural lifestyle properties where limited comparables create assessment errors
The 2027 GCAD Protest Deadline
Grayson County property owners must file a protest with GCAD by May 17, 2027, or 30 days after GCAD mails their Notice of Appraised Value — whichever is later.
✓GCAD address: 512 N. Travis Street, Sherman, TX 75090
✓Online filing: Available at graysoncad.org
✓Deadline: May 15 or 30 days from notice mailing date
✓TaxAppeal mails you a ready-to-sign protest kit to sign and mail before the deadline
TaxAppeal USA: $89 Flat for Grayson County
TaxAppeal USA checks first whether a protest will lower your bill after your exemptions and the homestead cap; if it won't, we tell you and don't sell you one. If it will, we mail you a ready-to-sign Grayson County protest kit: Comptroller Form 50-132 filled in, an equal-and-uniform comparison from GCAD's own roll, a checklist and a return envelope addressed to GCAD. You sign it and mail it before your protest deadline. Flat $89. At Grayson County's effective tax rate of approximately 1.8-2.3%, a $25,000 reduction saves $450-575 per year.
Frequently Asked Questions
What is the 2027 Grayson County property tax protest deadline? ▾
May 17, 2027, or 30 days after GCAD mails your Notice of Appraised Value — whichever is later.
Does TaxAppeal serve Sherman and Denison? ▾
Yes. TaxAppeal USA serves all Grayson County communities including Sherman, Denison, Gunter, Howe, Pottsboro, Van Alstyne, and all unincorporated areas.
Did the Texas Instruments announcement over-inflate Sherman property values? ▾
In many neighborhoods, yes. The corporate announcement triggered speculative buying that drove prices to levels that the current market — without the frenzy — does not fully support. If your GCAD assessment reflects 2022 peak values, you may have strong grounds to protest.
Can my GCAD appraisal go up if I protest? ▾
No. Texas Tax Code §41.43 prohibits GCAD from raising your appraised value solely because you filed a protest.
How much can Grayson County homeowners save? ▾
A typical successful protest reduces appraised value by $20,000-$40,000, saving $360-920 per year at Grayson County rates.
How do I file a Grayson County property tax protest? ▾
File online at graysoncad.org, by mail, or in person at 512 N. Travis Street, Sherman. TaxAppeal USA prepares it and mails it to you ready to sign for $89 flat — you sign it and mail it yourself.
Your appeal kit for $89 flat
We check whether an appeal will lower your bill before you pay. If it will, we mail you the official form filled in, your evidence and a return envelope. You sign it and mail it.
We check first. If an appeal will lower your bill, we mail you a ready-to-sign kit for $89 flat. You sign it and mail it, and you keep 100% of your savings.
TaxAppeal USA is a self-service document-preparation service. We prepare a ready-to-sign appeal kit and mail it to you; you sign it and mail it to the county yourself. In every state we serve, including Florida, we are not property tax consultants, agents, or representatives, we do not provide tax or legal advice, and we do not file appeals or represent customers before any appraisal district, board of assessors, board of equalization, value adjustment board, or review board. Every appeal, protest and petition is prepared for the property owner, signed by the owner, and mailed by the owner in the owner’s name. In Florida your petition is signed by you as the property owner under section 194.011(3), Florida Statutes, and the county’s Value Adjustment Board filing fee is paid by you directly to the county. TaxAppeal USA does not sign as your representative, does not appear before the Board, and does not present evidence or argument at a hearing.