The Real Estate Board of New York released a report about Rent Regulated Units in Landmark Districts. The report opens,

This analysis was conducted to examine the frequent assertion that landmarking helps preserve existing affordable housing. It is based on data that recently became publicly available that provides a snapshot of the number of rent-stabilized units in 2007 and again in 2014.

Contrary to statements made by advocates, affordable housing is not preserved at higher levels in NYC’s historic districts. The data shows that properties located within New York City’s historic districts showed a greater net loss of rent regulated apartments than those located in non-landmarked parts of the City.

FINDINGS

An analysis of the data found that, from 2007 to 2014, the decline in the number of rent regulated apartments located within New York City’s landmarked properties was four times higher than in non-landmarked parts of the City.

Citywide, landmarked properties showed a much greater decrease in the number of rent stabilized units (-22.5%) than non-landmarked properties (-5.1%). At the end of this seven year period, there was a net loss of nearly 10,000 rent-stabilized units in landmarked districts in the City.

The Manhattan and Brooklyn numbers are particularly startling. Manhattan landmarked properties lost 24.5% of their rent-stabilized units compared to a loss of 11.5% in nonlandmarked properties. And Brooklyn landmarked properties lost 27.1% of their rent-stabilized units compared to 3.4% in non-landmarked properties.

The historic districts that had the highest net loss of rent stabilized units were Greenwich Village (-1432 units) and the Upper West Side/Central Park West (-2730 units). Combined, these two historic districts showed a decrease of 30% in rent stabilized units during this seven-year period. (1, footnotes and references omitted)

This study has been criticized for conflating causation with correlation. I think the criticism is warranted. The relevant question appears to be whether landmarking causes an increase or decrease in the number of rent stabilized units. The REBNY study does nothing to demonstrate causation.

Intuitively, it would seem that residents of hot neighborhoods like Greenwich Village would both seek to keep out new, large developments (which landmarking would achieve) and see higher and higher rents over time (which would lead to a reduction in rent-regulated units through a variety of mechanisms). It is not obvious how landmarking itself would lead to a reduction in rent stabilized units.

It is a shame that the REBNY study is so flawed. It raises important questions, but just leaves us more confused than before. There are serious arguments that historic preservation reduces affordable housing overall. If REBNY wants to take a meaningful position in this debate, it should produce a serious study.