What is a property tax appeal?

A property tax appeal (also called a protest in Texas) is a formal process where you challenge your county appraiser's assessed value of your home. You file with the county Appraisal Review Board (ARB), present comparable-sales evidence that your home is overvalued, and the board issues a ruling.

When is the Texas property tax appeal deadline?

In Texas, the deadline to file a property tax protest is May 15 each year (or 30 days after your appraisal notice is mailed, whichever is later). The 2026 deadline has passed; the next protest window is April-May 2027.

How much can I save by appealing my property taxes?

Homeowners who appeal save an average of $774 per year in Texas, and you can protest again every year. Success rates range from 80-91% when you bring 3-5 comparable sales as evidence.

What's the difference between AppealMyTax and Ownwell?

AppealMyTax charges a flat $99, one time, for a complete personalized appeal packet you file yourself, or $199-$249 for our done-for-you filing service. You keep 100% of your savings every year. Ownwell keeps a 25-35% contingency on whatever you save and O'Connor keeps about half, meaning a $2,461 reduction costs you roughly $615-$1,230 every year forever. We charge $99 once and keep nothing.

What percent of homes in ZIP 75424 are overassessed?

32.5% of homes in Houston ZIP 75424 (593 of 1,822 parcels) are assessed more than 10% above the typical per-square-foot value for the neighborhood, based on HCAD public records.

How do I protest my property taxes in Houston ZIP 75424?

File a Notice of Protest with Collin CAD by May 15 each year. Bring 3-5 comparable sales from your immediate area to your ARB hearing. 2026 deadline has passed — next protest window is April-May 2027.

Collin County · Houston

ZIP 75424 property tax overassessment report

32.5% of homes in Houston ZIP 75424 (593 of 1,822 parcels) are assessed more than 10% above what comparable-size homes in the same ZIP typically pay per square foot. Combined annual overpayment: $3,266,941.

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1,822

Homes in ZIP

593

Flagged as overassessed

32.5%

$256,240

Avg overage / home

$450,899

Typical value

~$222/sqft

Collin County · over-assessed homes overpay year-round

Next: Collin CAD 2027 values mail late March-April. Protest deadline: May 15, 2027.

Collin County guide →

Top 25 most overassessed homes in 75424

Addresses anonymized. Pulled directly from HCAD public records. Each home pays significantly more than what a comparable-size home in this ZIP typically pays.

Address	Sq ft	Year	Market val	Expected	Overage	% over	$/yr
9XX FISCHER RANCH RD	9,762	2003	$8,405,715	$2,167,164	$6,238,551	287.9%	$127,266
7XX S BUSINESS 78	2,368	1975	$5,056,116	$525,696	$4,530,420	861.8%	$92,421
1XXXX COUNTY ROAD 576	3,674	2004	$5,086,206	$815,628	$4,270,578	523.6%	$87,120
6XXX FM 1377	552	1969	$3,503,275	$122,544	$3,380,731	2758.8%	$68,967
9XXX FM 1377	3,166	2016	$3,556,742	$702,852	$2,853,890	406%	$58,219
1XXXX HIGHGATE LN	3,626	1996	$3,377,088	$804,972	$2,572,116	319.5%	$52,471
7XXX FM 1377	3,005	2002	$2,914,534	$667,110	$2,247,424	336.9%	$45,847
6XXX FM 1377	1,400	1965	$2,541,607	$310,800	$2,230,807	717.8%	$45,508
4XXX CHARLIES LN	1,408	2006	$2,375,861	$312,576	$2,063,285	660.1%	$42,091
1XXXX FM 1377	1,996	1971	$2,434,355	$443,112	$1,991,243	449.4%	$40,621
1XXXX COUNTY ROAD 1002	9,084	2016	$3,965,000	$2,016,648	$1,948,352	96.6%	$39,746
7XXX OLD VALDASTA RD	2,377	1998	$2,440,489	$527,694	$1,912,795	362.5%	$39,021
1XXXX FM 981	1,344	1984	$2,074,078	$298,368	$1,775,710	595.1%	$36,224
1XXXX COUNTY ROAD 825	1,071	1998	$1,900,000	$237,762	$1,662,238	699.1%	$33,910
7XXX COUNTY ROAD 500	1,617	1955	$1,951,774	$358,974	$1,592,800	443.7%	$32,493
1XXXX COUNTY ROAD 1100	2,644	2020	$2,172,409	$586,968	$1,585,441	270.1%	$32,343
1XXXX COUNTY ROAD 673	2,300	1971	$2,020,928	$510,600	$1,510,328	295.8%	$30,811
9XXX COUNTY ROAD 626	2,395	2006	$2,017,666	$531,690	$1,485,976	279.5%	$30,314
1XXXX COUNTY ROAD 671	2,950	2021	$2,093,075	$654,900	$1,438,175	219.6%	$29,339
8XXX FM 545	3,233	2017	$2,141,202	$717,726	$1,423,476	198.3%	$29,039
5XXX COUNTY ROAD 500	1,650	2024	$1,770,893	$366,300	$1,404,593	383.5%	$28,654
1XXXX COUNTY ROAD 633	3,321	1999	$2,099,296	$737,262	$1,362,034	184.7%	$27,785
1XXXX COUNTY ROAD 632	4,009	2019	$2,219,464	$889,998	$1,329,466	149.4%	$27,121
1XXXX PRIVATE ROAD 5019	4,006	1970	$2,194,133	$889,332	$1,304,801	146.7%	$26,618
1XXXX N STATE HWY 78	3,000	2024	$1,968,414	$666,000	$1,302,414	195.6%	$26,569

Data: HCAD public records, Collin County, ZIP 75424. Addresses anonymized to protect privacy; full data is public record under Texas Public Information Act. Showing top 25 — there are likely more overassessed homes in this ZIP.

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