If your Harris County tax appraisal has increased, several factors may be contributing to the rise. Property values in your area may have gone up due to increased demand, new developments, or improvements in the neighborhood. The Harris County Appraisal District (HCAD) uses recent sales data of comparable properties, market trends, and property improvements to determine your property's assessed value. Additionally, if you've made upgrades or renovations to your property, this could increase its market value and, in turn, your appraisal. Rising construction costs and inflation may also impact the appraised value. If you believe your appraisal is too high, you have the right to file a property tax protest to challenge the assessment and potentially reduce your tax bill.