New York City homes worth hundreds of millions of dollars are tangled in ownership disputes that make them susceptible to foreclosure, deed theft and other predatory real estate schemes each year, according to a new report released Wednesday.

The analysis from the Center for NYC Neighborhoods found that roughly 350 “partition” lawsuits are filed annually to try to claim valuable homes in the five boroughs after an owner dies without a will or a clear estate plan.

The cases mostly target homes in Central Brooklyn and Southeast Queens after the properties revert to a web of heirs, each with stakes that amount to a fraction of an estate. Outside investors often purchase these shares from heirs for a pittance and attempt to force a full sale, though state legislation has sought to limit the practice in recent years.

Center for NYC Neighborhoods Executive Director Christie Peale said her organization compiled its report to determine the scope of the problem and provide data to demonstrate the need for government and philanthropic support for estate planning and fraud prevention.

“Deed theft, partition scams, contested estates are all outcomes that have the same impact,” Peale said. “Long-term families are displaced and heirs aren't able to retain intergenerational wealth.”

The problem of deed theft, fraud and ownership disputes gained renewed attention in April after Councilmember Chi Ossé was arrested outside a Bed-Stuy brownstone while protesting the eviction of a resident who said she was the rightful homeowner.

Two days later, Mayor Zohran Mamdani announced the creation of a new Office of Deed Theft Prevention to raise awareness about real estate schemes, promote estate planning and potentially refer cases to local prosecutors. Mamdani has proposed funding the new office with $500,000 next fiscal year, far less than the $10 million he pledged on the campaign trail.

Peale said she supports the new office and hopes her network of homeowner advocacy groups can work together with the city. Their research reveals the “need for greater investment in estate planning, legal assistance, homeowner education and flexible financing so families can stay in their homes,” she added.

The research team analyzed 182 lawsuits involving homes with an average value of $1.1 million that were filed during a five-month window between March and July 2024. It identified 23 potentially predatory schemes where limited liability companies had acquired partial shares in a property and attempted to force a sale.

But the researchers said their analysis undercounts the true scale of the problem because only a small percentage of heirs' property disputes reach a judge.

A more realistic estimate may be closer to $4 billion in New York City based on national trends and interviews with estate planners and attorneys, said report author Sabrina Bazile, a senior program manager at the Center for NYC Neighborhoods.

Bazile said deed fraud and partition schemes are most common in parts of Brooklyn and Queens, where incomes are lower than the city median and residents are predominantly Black and Latino. The report cites a history of discriminatory lending practices in these areas, a sharp rise in real estate speculation as home values spike, and a lack of access to estate planning.

‘These are neighborhoods undergoing gentrification,” Bazile said. “A lot of these are owners that are ‘house-rich’ but cash poor, so they have a significant amount of equity in their home.”

At least 517 people filed deed theft complaints with the state last year, according to data from the attorney general’s office.

Ossé, a Democrat representing Bed-Stuy and Crown Heights in the City Council, said the new attention on the problem and its scale is reaching more vulnerable homeowners — especially since his arrest.

He said more homeowners are beginning to understand the complexities of deed fraud or real estate schemes. People lose their properties through outright theft — like forged signatures on deeds and fraudulent documentation — as well as through more complicated means, like investors who exploit family disputes or target far-flung heirs to acquire their stakes in a property, he said.

“The conversation about deed theft has expanded beyond the typical understanding of what it looks like when someone steals a person’s deed,” Ossé said. “We are having more conversations about estate planning, will planning, foreclosure fraud, mortgage fraud — the array of pitfalls that a homeowner can fall into.”