Using Comparable Properties to Protest Your Assessment
The most effective way to protest your property taxes is by showing that similar homes in your area are assessed at lower values. These similar homes are called "comparable properties" or "comps."
What Makes a Good Comp?
A comparable property should be similar to yours in the ways that matter most for valuation:
- Size: Within 20-30% of your home's square footage
- Age: Built within 10-15 years of your home
- Location: Same neighborhood or subdivision, ideally within 1 mile
- Quality/grade: Similar construction quality and condition
- Features: Same number of stories, similar bedroom/bathroom count
The closer the comp matches your property, the more persuasive it is. Three strong comps beat twenty weak ones.
The $/sqft Comparison
The single most important metric in a property tax protest is appraised value per square foot. If your property is assessed at $180/sqft but similar homes in your area are assessed at $150/sqft, that's a clear sign of unequal appraisal.
Equity Analysis vs. Market Analysis
Equity (Unequal Appraisal)
Compare your assessed value per square foot to other assessed properties. This approach asks: "Is my assessment fair compared to my neighbors?" You don't need sales data — just HCAD's own appraisal records. This is usually the stronger argument because you're using HCAD's own numbers to show inconsistency.
Market Value
Compare your assessed value to recent sale prices of similar homes. This approach asks: "Is my assessment higher than what similar homes actually sell for?" You need actual sales records for this approach.
How Harris Value Finds Your Comps
Harris Value automatically analyzes your property against others in your area using HCAD's own data. Our algorithm considers square footage, year built, neighborhood, building quality, bedroom/bathroom count, lot size, and features like pools and garages. Each comp receives a match score indicating how closely it resembles your property.
Building a Strong Case
- Use 3-5 strong comps rather than many weak ones
- Highlight the median $/sqft of your comps vs. your own $/sqft
- If your property has condition issues the comps don't, mention that
- Combine equity evidence with sales data for the strongest possible case — Harris Value provides both
Sources and evidence for Harris County
Prepared by Harris Value. Filing resources checked September 4, 2026.
Start with the Harris County Appraisal District property record and your current notice. Our property pages organize imported public assessment records and available comparable evidence. Check the tax year and data dates shown on each page: a prior-year record is useful history, but does not establish the value on a new notice.
Comparable homes are candidates for review. Verify their size, age, condition, location, and sale details before using them. Value per square foot helps screen candidates; it does not account for every difference. Estimated savings depend on the final assessment, exemptions, assessment limits, and applicable tax rates.
Texas filing and valuation checks
For 2026, the ordinary May 15 filing date has passed. A notice mailed later can have a later deadline. Confirm the date on your notice and the HCAD filing instructions. Review Texas Comptroller protest guidance for procedures and owner rights.
Separate a market-value argument from unequal appraisal, and compare the same tax year. A homestead cap or exemption can make taxable value differ from market value; lowering market value may not change the bill immediately. Texas sales coverage is incomplete because sale prices are not universally disclosed.
Check the source before filing
Harris Value is an independent research tool. Verify the current procedure with Harris County Appraisal District, save a copy of your evidence, and retain your filing confirmation. The appraisal authority or review board decides the outcome.