Frequently Asked Questions

Arizona property owners must file appeals by September 1st of the tax year. The deadline is firm - late filings are not accepted regardless of reason. Prepare documentation early since gathering comparable sales data and ordering retrospective appraisals often takes several weeks before the deadline.

Maricopa County requires appraisals submitted for tax appeals to be completed by Arizona State-Certified Residential Appraisers when challenging residential property valuations. Non-certified opinions or out-of-state credentials don't meet evidentiary standards. The certification ensures the appraiser follows USPAP guidelines and understands Arizona-specific valuation law.

Retrospective appraisals value your property as of January 1st of the tax year, not the current date, because that's the assessment date Arizona law mandates. Appraisers research comparable sales from the six months before and after January 1st. This prevents using current market conditions to challenge prior-year assessments.

Residential tax appeal appraisals in Maricopa County typically cost between $400 and $600 depending on property size, complexity, and comparable sales research required. Retrospective appraisals require more time than standard appraisals because appraisers must reconstruct market conditions from a specific past date rather than current listings.

Yes, Appraisal Source covers all Maricopa County cities including Chandler, Mesa, Scottsdale, Tempe, Phoenix, Gilbert, and surrounding areas. Local market knowledge matters for retrospective appraisals since comparable sales must reflect neighborhood-specific conditions during the assessment period, not broader county trends.

Arizona does not allow deadline extensions or late appeals except in rare cases like military deployment or natural disasters. If you miss the deadline, you cannot challenge that tax year's assessment. The next opportunity is the following year's September 1st deadline for the subsequent tax year.

Compare your county-stated value to recent sales of similar homes in your neighborhood from six months before and after January 1st of the tax year. If comparable properties sold for significantly less than your assessed value during that window, an appeal may succeed. Assessment increases above 10% often warrant professional review.

The county accepts retrospective appraisals from Arizona State-Certified appraisers, comparable sales data with adjustment explanations, and documentation of property defects affecting value as of January 1st. Photos, repair estimates, and market trend reports strengthen appeals when they support the retrospective valuation conclusion.

After filing by September 1st, Maricopa County schedules hearings between October and December. Decisions typically arrive by January. The timeline depends on hearing volume and case complexity. Properties with clear comparable sales evidence and professional appraisals often resolve faster than those relying solely on owner testimony.

Yes, but success rates drop significantly without professional appraisals. The county employs licensed appraisers who testify at hearings - owners presenting informal opinions or online estimates rarely overturn assessments. State-certified retrospective appraisals carry evidentiary weight that personal research does not.