A careful appraisal review starts with facts, not a target number

Step 1: preserve the official notice and deadlines

Keep the notice of appraised value, account number, tax year, notice date, and instructions issued by the appraisal district. The Texas Comptroller states that the usual protest deadline is May 15 or 30 days after the appraisal district mails the notice, whichever is later, but exceptions and local procedures exist. Use the deadline printed on the notice and the current official district instructions.

Ammax Home is not a filing service and does not calculate a legal deadline. If a deadline is close or disputed, contact the appraisal district, taxpayer liaison officer, or a qualified adviser promptly.

Step 2: audit the subject record

• Confirm situs address, account identity, owner information, and tax year.
• Check property class, land area, building area, year built, quality or grade, condition, and extra features.
• Look for additions, demolished structures, storm damage, or renovations that may not be reflected correctly.
• Separate market, appraised, and taxable values.
• Confirm exemptions and value status without assuming they affect market value.

An objective review includes errors that could raise or lower value. Correct property characteristics matter independently of the desired outcome.

Step 3: define the comparison method before seeing results

Write down the initial radius, living-area tolerance, property type, age range, and tax year. Decide how neighborhood barriers and land differences will be handled. Predefined criteria reduce the temptation to keep only records that support one conclusion.

Ammax Home's defaults—one-half mile, plus or minus 15 percent living area, the same property class, and an optional ten-year age range—are transparent starting points. They should be adjusted when the local housing stock or available data gives a reason.

Step 4: review the full set before applying ceilings

First inspect all records meeting the physical screens. Compare land value, improvement value, market PSF, improvement PSF, lot characteristics, and building details. Look at both average and median. Investigate extreme values and incomplete records.

A subject-as-ceiling setting deliberately removes higher-PSF properties. That can answer a narrower question, but it should not be mistaken for an unbiased summary of the full comparable set. Keep market and improvement ceilings separate because they measure different value components.

Step 5: document differences with reliable evidence

For each retained property, note why it is similar. For each removed property, note the specific difference. Supporting material might include official account details, permits, surveys, dated photographs, repair estimates, flood information, or other reliable records appropriate to the issue. Avoid unsupported statements such as “everyone knows this street is worse.”

If a sale price is important, use a source authorized to provide verified transaction data. Do not relabel an appraisal value, automated estimate, listing price, or rumor as a closed sale.

Step 6: understand the official process

The Texas Comptroller explains that property owners may protest certain appraisal-district actions to an appraisal review board, an independent group of local citizens that hears disputes. In Harris County, HCAD offers online filing and an iSettle process; owners who do not resolve the matter may proceed to an ARB hearing according to applicable procedures.

Grounds, evidence rules, forms, deadlines, hearings, settlements, and appeal options are legal and procedural matters. Read the current Comptroller and district materials rather than relying on a checklist written for another year or county.

Official resources

• Texas Comptroller: Appraisal Protests and Appeals — current statewide process, deadlines, and appeal information.
• Texas Comptroller: Property Taxpayers' Bill of Rights — equal and uniform taxation, access to information, protest, and appeal rights.
• HCAD: iFile and iSettle — Harris County's online protest and settlement workflow.