123 Main St, Austin, TX: No Verifiable Property Record Found, Valuation Not Reliable
Executive Summary
I could not confirm that a property at "123 Main St, Austin, TX" exists in the public-record databases I queried, so I cannot give a defensible value for it. ATTOM returned no result for the property detail lookup, the AVM lookup, and the same lookup with ZIP codes 78701 and 78702. RentCast's property-records endpoint also returned "No data found" for the address, with and without ZIP 78701 (RentCast tool output, data/tool_results_summary.md).
RentCast's estimate endpoints did return numbers, but they rest on a geocoded point, not a matched record. The subject came back as "123 Main St, Austin, TX 78702" at latitude 30.3074, longitude -97.7598, with no bedrooms, square footage or year built. That point is near the 78703 comparables, not in the 78702 ZIP it was labelled with (RentCast tool output, data/tool_results_summary.md). Treat every number below as a lead for verification, not a valuation.
The practical next step is to confirm the exact address (ZIP, unit, parcel number) and re-run.
What the Data Sources Returned
| Source | Result | Usable? |
|---|---|---|
| ATTOM property detail and AVM | No result (HTTP 400 "SuccessWithoutResult"), including with ZIP 78701 and 78702 | No |
| RentCast property records | "No data found" for the address | No |
| RentCast value estimate | $1,657,000, range $850,000 to $2,464,000 | Low confidence |
| RentCast rent estimate | $1,490 per month, range $1,190 to $1,790 | Low confidence |
Source for the RentCast rows: RentCast tool output saved in data/tool_results_summary.md. I did not run Realie, Zillow or county appraisal-district lookups, so ownership, tax assessment and liens are not covered.
Why the RentCast Estimate Should Not Be Relied On
- Wide range: the value range spans $850,000 to $2,464,000, nearly a threefold gap, which signals the model had little to anchor on (RentCast tool output,
data/tool_results_summary.md). - Mismatched comparables: the 15 comparables mix single-family homes, a condo, a multi-family building and a land lot, with sizes from 846 to 3,964 square feet. Prices run from $500,000 (the land lot) to $2,975,000 (RentCast tool output,
data/tool_results_summary.md). - Asking prices, not sales: the comparables are listings, many now inactive. For example, 3302 Funston St (4 bed, 2,265 sf) was listed at $1,290,000 and removed 2 August 2026 with no sale price in the data. That is an asking price, not a closed sale.
- Inconsistent rent versus value: a $1,490 rent against a $1,657,000 value implies a gross yield near 1.1%. Using my own arithmetic (12 x 1,490 / 1,657,000), that is far below what the ZIP-level rents suggest, which in my inference means at least one of the two figures does not fit a real property.
KEY TAKEAWAY: The estimate reflects a typical high-priced 78703 neighborhood listing mix, not any identified house.
Market Context for the Two Candidate ZIP Codes
Market statistics are the only reliable output here, because they do not depend on matching the address. The table shows RentCast's figures, last updated 5 October 2026.
| Metric | 78702 | 78703 |
|---|---|---|
| Average sale price | $765,114 | $1,747,179 |
| Median sale price | $650,000 | $1,295,000 |
| Average price per sq ft | $510.97 | $693.67 |
| Average days on market (sale) | 96.92 | 93.78 |
| Listings counted | 352 | 203 |
| Average rent | $2,752 | $2,600 |
| Median rent | $2,450 | $2,273 |
Source for both columns: RentCast market statistics output, data/tool_results_summary.md.
If the property is in 78702, the median is about two-fifths of the RentCast point estimate; if in 78703, the estimate sits between the median and average. Median rents of $2,273 to $2,450 are well above the $1,490 point rent estimate, which supports treating that estimate as unreliable.
Limitations and What to Do Next
- Confirm the address: obtain the ZIP code, unit number or Travis Central Appraisal District parcel ID. Then re-run ATTOM and RentCast.
- Not covered: ownership, tax assessment, liens, permits, flood risk, schools and crime were not retrieved because no record matched.
- No formal valuation: I did not build a comparable-sales, income or cost-approach valuation. Doing so on unmatched data would imply precision the evidence does not support.
- Professional verification: a licensed appraiser and a title search are needed for any transaction.
Confidence: high that no record was found in ATTOM and RentCast under this address; low for every RentCast estimate.
Sources
- ATTOM property detail result for 123 Main St, Austin (gateway tool output,
data/tool_citation_manifest.md, t1) - ATTOM AVM detail result (gateway tool output,
data/tool_citation_manifest.md, t2) - ATTOM ZIP-specific lookups (gateway tool output,
data/tool_citation_manifest.md, t3) - RentCast value, rent, property-record and market-statistics outputs (gateway tool output,
data/tool_results_summary.md)