Conversions Eliminated Over 100K Housing Units in New York City

Apartment-to-house conversions are contributing to a net loss of housing in some of the city’s historic neighborhoods.

1 minute read

August 28, 2023, 5:00 AM PDT

By Diana Ionescu @aworkoffiction


Colorful historic brownstones in New York City

goodmanphoto / Adobe Stock

According to an article by Rachel Holliday Smith in The City, “over the last 70-plus years, mergers of flats and rooming houses into bigger residences have taken a steady toll on [New York City’s] housing stock, a new study finds.”

The study from historic preservationist Adam Brodheim found that in Manhattan, where conversions have been most aggressive, “each conversion accounted for the loss of between six or seven units on average.” Based on Brodheim’s estimate, the city lost 104,000 housing units to conversions since the 1950s.

“In the past decade, such apartment combinations have nearly erased gains made by the construction of new housing units in the wealthiest parts of the city, particularly in the Upper East and Upper West sides of Manhattan.” The city’s historic districts also experienced a net loss of housing between 2010 and 2022.

The answer, for Brodheim and others, is not to limit conversions, but to make up for them.“Trying to restrict that activity is not necessarily beneficial because there is a demand for it. What this illustrates is that you just have to build a lot more housing.” 

Thursday, August 24, 2023 in The City

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

elongated-horizontal-arrow-3.webp

National Parks Layoffs Will Cause Communities to Lose Billions

Thousands of essential park workers were laid off this week, just before the busy spring break season.

February 18, 2025 - National Parks Traveler

Paved walking path next to canal in The Woodlands, Texas with office buildings in background.

Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50

A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.

February 19, 2025 - Greg Flisram

Small rural USPS post office in manufactured one-story grey building with American flag in front.

Delivering for America Plan Will Downgrade Mail Service in at Least 49.5 Percent of Zip Codes

Republican and Democrat lawmakers criticize the plan for its disproportionate negative impact on rural communities.

February 12, 2025 - Cowboy State Daily

Chicago

Test News Post 1

This is a summary

April 8 - 2TheAdvocate.com

test alt text

Test News Headline 46

Test for the image on the front page.

March 5 - Cleantech blog

Military humvee driving through gate at Fort Indiantown Gap Natl Guard training center in Pennsylvania surrounded by winter trees and dead leaves.

Balancing Bombs and Butterflies: How the National Guard Protects a Rare Species

The National Guard at Fort Indiantown Gap uses GIS technology and land management strategies to balance military training with conservation efforts, ensuring the survival of the rare eastern regal fritillary butterfly.

February 24 - Esri Blog