What 3,006 listings taught me about the "Four Sisters"

Over the past two decades, the cooperative housing market of the Lower East Side has quietly revealed itself to be one of the most stable —and analytically distinct —residential ecosystems in Manhattan .

Drawing on 3,006 recorded listings and 1,285 closed sales spanning March 2004 through November 2025, More For LES has released a report: 20 Years, 4 Co-ops, & 10002 .

Download the entire paper here .

20 Years, 4 Co-ops, & 10002 examines four cooperatives that together form a uniquely consistent dataset:
Seward Park Housing Corporation
East River Housing Corporation
Hillman Housing Corporation
Amalgamated Dwellings

Taken as a whole, these buildings allow us to observe long-horizon patterns in pricing , turnover , demand , and even the influence of architecture in a way that few other Manhattan submarkets can.

Despite their shared origins and geography , each co-op behaves differently in the market:

Seward Park functions as the largest marketplace by listing volume.
Amalgamated and Hillman exhibit the greatest internal stability , with fewer listings cycling through the market over time.
East River, meanwhile, shows a demand curve that is deeply tied to family-sized housing needs .

These differences matter — and they recur consistently across market cycles .

What unites all four, however, is something more structural : the Lower East Side is a low-churn, high-tenure homeownership environment . Units do not trade frequently . In many cases, apartments come to market only once per generation . That characteristic alone has significant implications for:

Pricing behavior
Buyer competition
Long-term value retention

Across the full dataset, the market operates with a 42.7% conversion rate , reflecting the reality that many listings are withdrawn , repositioned , or relisted without a recorded sale . (More on the “conversion” rate in subsequent posts .)

The data also reveals unevenness and incompleteness , particularly in early-2000s records:

2,238 listings lack square footage
799 lack floor numbers
Many entries contain inconsistent or missing line information

These gaps don’t invalidate the analysis — but they do require careful interpretation , especially when evaluating early-cycle metrics . (Oh, yes, I did the “careful” interpretation.)

Even with those limitations, the dataset is both large and rich enough to surface useful, durable insights .

Here’s the #TLDR:

Over twenty years , the LES cooperative market shows a clear long-term pricing trajectory , rising steadily through multiple economic cycles —including the 2008 financial crisis , the 2020 COVID disruption , and the 2021 rebound .

Across the full time range, we see:

Meaningful multi-cycle appreciation
Consistent liquidity in the one- and two-bedroom segments
Sustained demand for renovated , well-positioned , and line-advantaged apartments

The posts that follow will represent my best attempt to translate this data into something practical : building-accurate, line-accurate, and unit-accurate insight into how these four cooperatives have evolved —and what their current value structures may suggest about future opportunity .

This is the foundation . Next, we’ll unpack the juicy stuff .