Heir properties — parcels where the recorded owner has died or where ownership has fragmented across multiple surviving family members — are one of the highest-leverage niches in off-market real estate. Until now, no one had published a county-level density map of where in America these opportunities actually concentrate.

We did. We analyzed 12,351,804 tax-delinquent parcel records across 343 counties in 48 states and ranked every county by the percentage of its parcels showing heir-property signals. The result is the first nationwide heir-property density map we've seen published, and it has one finding that shocked us.

The Single Most Surprising Number

Harris County, Texas — Houston — has a heir-signal density of 35.33%. That's 13,094 heir-flagged parcels out of 37,063 tax-delinquent records on its roll. It is more than 2x the density of the #2 county nationally (Bradford, Florida at 15.02%) and roughly 9x the U.S. average for our coverage area.

If you've been working heir deals anywhere in America and not paying attention to Houston, the data says that's the single largest mistake you can correct this year.

Top 20 Counties Nationally by Heir-Signal Density

Filter: counties with at least 10,000 tax-delinquent parcels in our coverage area. This removes tiny counties where a small number of flagged parcels can produce statistical noise.

Rank	County	State	Heir Density	Heir-Signal Parcels	Total Parcels
1	Harris (Houston)	TX	35.33%	13,094	37,063
2	Bradford	FL	15.02%	2,332	15,521
3	St. Johns	FL	14.87%	22,446	150,934
4	Collier (Naples)	FL	13.59%	44,887	330,387
5	Okaloosa	FL	9.53%	8,152	85,500
6	Maricopa (Phoenix)	AZ	9.07%	2,728	30,089
7	Duval (Jacksonville)	FL	7.80%	42,428	543,929
8	Jefferson	FL	7.69%	897	11,666
9	Madison	FL	7.55%	1,229	16,271
10	Walton (30A)	FL	7.52%	6,565	87,331
11	Lake	FL	7.31%	14,486	198,128
12	Gulf	FL	6.47%	1,235	19,081
13	Hillsborough (Tampa)	FL	6.38%	32,531	510,138
14	Charlotte	FL	6.27%	13,567	216,443
15	Martin	FL	6.19%	3,676	59,426
16	Nassau	FL	6.17%	3,419	55,439
17	Brevard (Space Coast)	FL	5.78%	19,098	330,464
18	Putnam	FL	5.61%	5,321	94,853
19	Gilchrist	FL	5.36%	740	13,809
20	Monroe	FL	5.32%	3,762	70,725

What the National Map Actually Shows

Three patterns jump off the page:

1. Florida and Texas dominate, but for very different reasons

Florida fills 17 of the top 20 spots by density. Texas takes #1 by a huge margin but only contributes one county to the top 20. The rest of Texas's 110 covered counties show much lower density (statewide average: 1.41%).

Why? Florida has decades of intergenerational property holding in coastal and retirement-county markets — heir signals show up at the county-roll level because ownership chains routinely span 2-3 generations without formal probate. Texas's signal is heavily concentrated in Harris County itself, likely reflecting Houston's combination of long-tenure homeownership in historically Black and Hispanic neighborhoods, where heir-property law has been a known structural issue for decades.

2. Maricopa, Arizona is the only non-FL/non-TX county in the top 10

Phoenix appears at #6 with 9.07% heir-signal density. That's the highest of any Western county we tracked. The other top-density Western counties (in California, Oregon, Washington, Nevada) all came in below 1%.

Maricopa stands out because of its unusual mix: rapid population growth combined with a substantial 1950s–1970s ownership cohort whose properties are now passing to heirs. If you're working heir deals on the West Coast and haven't tested Phoenix, the data says you should.

3. The "deceased-owner" signal tells a different story than heir density

Heir signals and deceased-owner signals overlap but aren't the same. Deceased signals require an explicit cross-reference with death-record data; heir signals can fire on indirect indicators (multi-owner same surname, "ESTATE OF" name tokens, ownership-type codes). The deceased-signal leaderboard reorders the country dramatically:

State	Deceased-Owner Signals	Total Parcels Tracked
TX	148,471	1,135,185
FL	83,643	9,192,752
NC	7,654	26,051
GA	5,111	27,617
GA, NC, SC combined	12,917	55,104

Texas has more deceased-owner signals than Florida despite having less than 13% of Florida's total parcels. North Carolina, with only 26,051 parcels in our coverage, contains more confirmed deceased-owner signals than 44 entire states. The Southeast is, as a region, a structural concentration of probate-related opportunities — and the data says it's underweighted in most investors' attention compared to where it actually concentrates.

State-Level Coverage Summary

Total coverage: 48 states, 343 counties, 12,351,804 parcels. Top 10 states by total parcels:

State	Counties Covered	Total Parcels	Heir-Signal %
FL	67	9,192,752	3.91%
TX	110	1,135,185	1.41%
NJ	3	240,198	—
DE	1	202,118	—
MI	1	180,194	—
MA	1	160,956	—
OK	1	143,889	—
AL	1	142,205	—
CT	1	120,617	—
OR	1	111,377	—

Coverage is heavily Florida-weighted because Florida county data is more openly published than most other states. The "—" rows are counties where heir-signal enrichment hasn't been run yet, not counties where the signal is genuinely zero. This is the single biggest caveat below.

Methodology: What Counts as a "Heir Signal"

A "heir signal" is a flag set by our enrichment pipeline when a parcel's ownership record suggests the owner may be deceased, the property may have passed to multiple heirs without formal probate, or the parcel is held in an estate or trust. Each flag below contributes:

Name tokens: owner-of-record names containing "HEIRS," "ESTATE OF," "ET AL," or generation suffixes (Jr/Sr/III) alongside a surviving family member.
Multi-owner parcels with shared surnames — classic signature of inherited co-ownership.
Long-tenure ownership on a mailing address that no longer matches the property address — common when heirs inherit but don't update records.
Ownership-type codes explicitly marked as "estate" or "trust" in the county roll.
Probate filings matched to the owner of record via court-record cross-reference.
Deceased-owner cross-reference: matched against the SSDI death index when available (this is the stricter "deceased" flag).

Each signal alone is imperfect. A parcel held in a trust isn't necessarily a heir-property opportunity. A multi-owner parcel with shared surnames might just be spouses. But in aggregate, the flag surfaces a credible shortlist worth investigating.

What This Means for Investors

If you can only work one market: Houston

13,094 heir-signal parcels in a single county, at 35% density on the delinquent roll, is unmatched anywhere else in America. Even with high competition from local probate attorneys and seasoned operators, the absolute volume is large enough that a focused list-buy + skip-trace + mailer campaign on Harris County alone is a multi-year strategy.

If you want lower competition: Florida secondary counties

Bradford, Okaloosa, Madison, Walton, and Putnam — all in the top 20 by density — get a fraction of the investor attention that Miami and Orlando receive. Ranking high on density with smaller absolute totals means door-knock and direct-mail economics work better, and you're not competing with the same five wholesalers everyone else is.

If you're West Coast: Phoenix is the right test

Maricopa is the only top-10 county outside FL/TX. Most West Coast counties are well below 1% density. If you've been pattern-matching from California and dismissing the heir-property strategy as "an East Coast thing," Maricopa is the data point that says reconsider.

If you're a Southeast operator: spread out

Georgia, North Carolina, and South Carolina collectively have density that's much higher than their county-coverage footprint suggests. Our coverage there is thin — but the deceased-signal density per parcel we do track is among the highest in the country. Expect Georgia, the Carolinas, and Alabama to climb the leaderboard fast as we expand county coverage in 2026.

Important Caveats

Coverage is uneven. Florida's 67 counties dominate the dataset because Florida publishes parcel data more openly than most states. A "0.00%" heir-signal rate in a state with 1 covered county doesn't mean the state has no heir properties — it means we haven't run the enrichment there yet.
Heir signals are leads, not confirmed cases. Any parcel you pursue requires county probate verification.
Density vs. raw count is a real tradeoff. Harris (Houston) wins on both. Bradford wins on density but only contains 2,332 flagged parcels — exhaust that list and your campaign is over.
The deceased-signal numbers require SSDI cross-reference. We've run that join on a subset of counties — Texas more aggressively than Florida, which is why TX leads the deceased leaderboard despite having a much smaller dataset overall.
The 343-county/48-state footprint will keep expanding. Expect this leaderboard to reshuffle as Georgia, the Carolinas, Alabama, and Mississippi get full coverage.

Get the Full County List

We track heir-property signals across 343 counties in 48 states, with new counties added every week. LienSuite's cases browser lets you filter by the heir-signal flag, sort by score, and export filtered lists for your preferred outreach channel.

If you want to work this strategy seriously — whether on Harris County, the Florida coast, or one of the smaller emerging markets above — create a free account and filter by the "heir signals" toggle on the cases page. Every county above is live in the platform.

Questions about methodology or want us to pull similar data for a specific county? Email [email protected].

America's Heir-Property Map: What 12.3 Million Tax-Delinquent Parcels Reveal