Get a property tax assessment cut by almost 8% with comparable sales found by Claude Code

Posted

Sep 6, 2026 by Mahdi Farra (@mahdif)

·

Last checked

Oct 21, 2026

·

Method:

How we verify

Evidence: Described by posterThe person describes what happened in words, without screenshots or video.

Outcome

Mahdi Farra had previously paid an appeal service a share of the saving to lower a rising property tax assessment. This year Farra gave Claude Code the address and new assessed value and asked for recent comparable sales around the January 1 lien date. It came back with three solid comps and a short case for a lower value, which Farra pasted into the county's informal decline-in-value form in about 10 minutes. Two months later the county accepted Farra's number to the dollar, cutting the assessment by almost 8%, about $1,200 a year off the bill.

AI tool

Claude Code

The source didn't share its exact prompt, so we wrote this from what it describes.

What the prompt labels mean

Run this task now, exactly as written below. Everything you need is here, so start straight away and only stop if something required is missing or a rule below tells you to.

Goal: Build the evidence for asking my county to lower my property's assessed value.

Fill in before running:
- My address and property details: [DETAILS]
- The new assessed value: [AMOUNT]
- My county and its valuation date: [COUNTY AND DATE]

You're not my accountant or financial adviser. Show your working, label estimates as estimates, and tell me which points a professional or the official source should confirm.

Rules:
- Find recent sales of comparable homes close to the valuation date, with links to the public records or listings.
- Explain why each comp is comparable (size, age, location) and adjust for big differences.
- Write a short case for a specific lower value, using only the comps.
- Tell me whether my county has an informal review before a formal appeal, and the deadline.
- Check facts that can change (prices, opening hours, dates, availability, rules) against the official source, and tell me anything you couldn't verify.

Output: Three or more comps in a table, a suggested value and a short paragraph I can paste into the county form.

You'll know it worked when: the county accepts a lower value.

Run this task now, exactly as written below. Everything you need is here, so start straight away and only stop if something required is missing or a rule below tells you to.

Goal: Build the evidence for asking my county to lower my property's assessed value.

Fill in before running:
- My address and property details: [DETAILS]
- The new assessed value: [AMOUNT]
- My county and its valuation date: [COUNTY AND DATE]

You're not my accountant or financial adviser. Show your working, label estimates as estimates, and tell me which points a professional or the official source should confirm.

Rules:
- Find recent sales of comparable homes close to the valuation date, with links to the public records or listings.
- Explain why each comp is comparable (size, age, location) and adjust for big differences.
- Write a short case for a specific lower value, using only the comps.
- Tell me whether my county has an informal review before a formal appeal, and the deadline.
- Check facts that can change (prices, opening hours, dates, availability, rules) against the official source, and tell me anything you couldn't verify.

Output: Three or more comps in a table, a suggested value and a short paragraph I can paste into the county form.

You'll know it worked when: the county accepts a lower value.

Run this task now, exactly as written below. Everything you need is here, so start straight away and only stop if something required is missing or a rule below tells you to.

Goal: Build the evidence for asking my county to lower my property's assessed value.

Fill in before running:
- My address and property details: [DETAILS]
- The new assessed value: [AMOUNT]
- My county and its valuation date: [COUNTY AND DATE]

You're not my accountant or financial adviser. Show your working, label estimates as estimates, and tell me which points a professional or the official source should confirm.

Rules:
- Find recent sales of comparable homes close to the valuation date, with links to the public records or listings.
- Explain why each comp is comparable (size, age, location) and adjust for big differences.
- Write a short case for a specific lower value, using only the comps.
- Tell me whether my county has an informal review before a formal appeal, and the deadline.
- Check facts that can change (prices, opening hours, dates, availability, rules) against the official source, and tell me anything you couldn't verify.
- Flag any comp that sold under unusual conditions, such as a foreclosure or a sale between family members.

Output: Three or more comps in a table, a suggested value and a short paragraph I can paste into the county form.

You'll know it worked when: the county accepts a lower value.

Before you finish: re-read my goal and constraints, check your answer against each one, and list anything you assumed or couldn't confirm.

Source

https://x.com/mahdif/status/2096638096372830669