Making the Case for ADUs and Housing Equity

For Montgomery County in Maryland, accessory dwelling units are a viable strategy to help ease the affordable housing crisis.

1 minute read

August 21, 2019, 2:00 PM PDT

By Camille Fink


Accessory Dwelling Unit

radcliffe dacanay / Flickr

"Allowing more accessory apartments doesn’t overhaul zoning a la Minneapolis or Oregon, but provides a first step towards allowing a mix of compatible residential uses in single-family zones. It also starts a larger conversation about how we can provide more inclusive neighborhoods for those who are currently left out," writes Jane Lyons.

She examines more closely the potential of accessory dwelling units in Montgomery County in Maryland, where home prices and rents are high and the majority of the county is zoned for single-family homes. Additional ADUs mean more affordable, sustainable housing in the area.

"Every accessory apartment built on an existing lot in Silver Spring or Bethesda is a new home where infrastructure already exists, rather than in a greenfield farther out that would require new roads, schools, sewers, and water and the destruction of forests and farmland," notes Lyons.

Lyons adds that the county needs to simplify the process for designing, building, and financing ADUs, and it needs to partner with organizations that can support interested homeowners. “None of these initiatives would make a difference if a large swath of homes were barred from building an accessory apartment in the first place. That’s why updating zoning to allow for more accessory apartments was such an important move."

Wednesday, August 14, 2019 in Greater Greater Washington

Young Professional

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 and Environmental 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 and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

A pencil rendering of Foundry Park, which shows skyscrapers and public green spaces.

Chicago breaks ground on $3 billion megadevelopment

The new neighborhood, titled Foundry Park, will one day host 3,700 residences.

October 23, 2026 - Chicago Sun Times

A swamp in South Carolina with tall pale trees and Spanish moss in the water.

Satanic place names

From streams and lakes to valleys and canyons, I mapped more than 1,000 places named after the Devil.

October 31 - The Daily Yonder

A rendering of a high speed rain station in California, with wide platforms and a sleep train with yellow highlights.

California High-Speed Rail Authority CEO resigns after $600,000 scandal

Under Ian Choudri, the authority used taxpayer dollars to fund first class flights and trips to nightclubs.

October 30 - Cal Matters

 A bridge stretches across the Missouri River at Chamberlain, South Dakota.

Want to study the Missouri River? Soon, you may need unanimous approval from 10 states

Legislation would require 10 governors’ permission to study or build projects moving water outside the basin.

October 30 - South Dakota Searchlight