Does Limiting Rowhouse Expansions Preserve, or Prevent, Affordable Housing?

The Washington D.C. Zoning Commission is considering a proposal to limit the ability to convert or expand rowhouses. The proposed ordinance has provoked controversy about the effect of the law for the city's supply of housing.

2 minute read

January 22, 2015, 2:00 PM PST

By James Brasuell @CasualBrasuell


"Sixty-six people have written to the Zoning Commission about a proposal that would substantially limit property owners' ability to expand rowhouses or convert them into condos," reports Aaron Wiener. "The overwhelming majority of the letter-writers, 52 of them, support the proposal. But among the 14 dissenters is an influential voice: the former boss of the office that hatched this plan."

Wiener refers to Harriet Tregoning, now with the U.S. Department of Housing and Urban Development after leading the Washington D.C. Office of Planning under mayors Adrian Fenty and Vince Gray.

During her time as head planner, Tregoning pushed for policy that runs counter to the current proposal. Namely, the current proposal, crafted in response to a proliferation of "pop-ups," "would restrict the addition of extra stories, or pop-ups, on rowhouses in medium-density R-4 zones, and the conversion of these rowhouses to multiple units." The current proposal was released in June, a few months after Tregoning left for the federal government.

According to Wiener, "[the] Office of Planning's Jennifer Steingasser testified last week that the proposal would help preserve affordable housing for families, rather than let it be converted to condos for singles or couples. But Tregoning, in her letter to the Zoning Commission, disagrees."

In Tregoning's own words, as quoted by the article: "I am somewhat puzzled by the proposition that we can increase affordability by decreasing the supply of potential housing units….Restricting the number of units just limits the housing supply in some of the most central and transit- and amenity-supplied neighborhoods of the city."

Wednesday, January 21, 2015 in Washington City Paper

Aerial view of homes on green hillsides in Daly City, California.

Depopulation Patterns Get Weird

A recent ranking of “declining” cities heavily features some of the most expensive cities in the country — including New York City and a half-dozen in the San Francisco Bay Area.

April 10, 2024 - California Planning & Development Report

Aerial view of Oakland, California with bay in background

California Exodus: Population Drops Below 39 Million

Never mind the 40 million that demographers predicted the Golden State would reach by 2018. The state's population dipped below 39 million to 38.965 million last July, according to Census data released in March, the lowest since 2015.

April 11, 2024 - Los Angeles Times

Large blank mall building with only two cars in large parking lot.

Pennsylvania Mall Conversion Bill Passes House

If passed, the bill would promote the adaptive reuse of defunct commercial buildings.

April 18, 2024 - Central Penn Business Journal

Young woman and man seated on subway car looking at phones.

Google Maps Introduces New Transit, EV Features

It will now be easier to find electric car charging stations and transit options.

April 19 - BGR

Ohio state capitol dome against dramatic lightly cloudy sky.

Ohio Lawmakers Propose Incentivizing Housing Production

A proposed bill would take a carrot approach to stimulating housing production through a grant program that would reward cities that implement pro-housing policies.

April 19 - Daytona Daily News

Aerial view of Interstate 290 or Eisenhower Expressway in Chicago, Illinois.

Chicago Awarded $2M Reconnecting Communities Grant

Community advocates say the city’s plan may not do enough to reverse the negative impacts of a major expressway.

April 19 - Streetsblog Chicago

News from HUD User

HUD's Office of Policy Development and Research

Call for Speakers

Mpact Transit + Community

New Updates on PD&R Edge

HUD's Office of Policy Development and Research

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.