Contest your property tax assessment with comps

Pull your property card, check it for factual errors (square footage, bedrooms, condition), find lower-valued comps, and let AI build a clear one-page case for the appeal board.

Realistic savingsReported: -$362.50/yr (Maryland, wallethacks); -$46,000 assessed value / ~$1,400 tax (Texas); >$1,000 (X user). Wins lower the base for future years.

DifficultyMedium

Time3-6 h

Real-world reports

Self-reported results; not independently verified by us. Your outcome will differ.

Tools

ChatGPT, Claude, Gemini or Grok (free tiers work; paid ~$20/mo helps with long files)
County assessor property card
3-6 recent comparable sales (Zillow/Redfin/realtor MLS)

Steps

Find your assessment notice and appeal deadline (often 30-60 days).
Download your property record card; ask AI to list any factual errors vs reality.
Collect 3-6 comps: similar size, age, neighborhood, sold near the valuation date.
Paste data; ask AI for a price-per-square-foot analysis and one-page argument.
Add photos of defects/repairs needed.
File the appeal; bring printed copies to any hearing.

Copy-paste prompt

My home: [sqft, beds, baths, year, lot, condition]. Assessed at $[X] as of [DATE]. Comps: [address, sqft, sale price, date] x5. Build a concise case that the assessed value should be lower, with a price-per-sq-ft table, adjustments, and a requested value. Note any weakness in my case.

What to verify

Use sales near the official valuation date; confirm comp facts in public records.

Legal & ethical notes

Assessments can also go up on review in some places; read your county rules.

Go deeper on money workflows with AI Money Playbooks: verify-first AI prompts for budgeting, bookkeeping, bills and taxes.

Official sources

Lincoln Institute: property tax basics

Educational only; not legal, tax, medical or financial advice. Laws and prices change; check official sources.

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