Portland Makes ADU Incentives Permanent

Development fees can add some $15,000 to the cost of building a home in Portland. Residents adding an accessory dwelling unit to their property won't need to worry about those expenses, as long as they don't use the limit for short-term rentals.

1 minute read

May 9, 2018, 8:00 AM PDT

By James Brasuell @CasualBrasuell


Accessory Dwelling Unit

radcliffe dacanay / Flickr

"The Portland City Council has moved aggressively to boost construction of more 'granny flats' or accessory dwelling units, by permanently eliminating costly development fees for those who build them," reports Steve Law.

The fee waiver has been in place since 2010, but the City Council vote makes the waiver permanent. The waivers are part of an incentive system that has spurred the growth of accessory dwelling units (ADUs) from 50 new units a year to 500, according to Law.

Law notes that the City Council set up the fee waiver to address a growing backlash against ADUs as some homeowners convert their ADUs into short-term rental unit. "The resolution adopted by the council…requires ADU builders to attest that they won't rent the units as short-term rentals for 10 years. If homeowners do rent them out via Airbnb or similar platforms during the ensuing decade, the SDC fees must be paid, along with a 50 percent penalty."

Thursday, May 3, 2018 in Portland Tribune

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

High-rise apartment buildings in Waikiki, Hawaii with steep green mountains in background.

Study: Maui’s Plan to Convert Vacation Rentals to Long-Term Housing Could Cause Nearly $1 Billion Economic Loss

The plan would reduce visitor accommodation by 25,% resulting in 1,900 jobs lost.

April 6, 2025 - Honolulu Civil Beat

Two yellow and white Dallas Area Rapid Transit light rail streetcars at station in Dallas, Texas.

North Texas Transit Leaders Tout Benefits of TOD for Growing Region

At a summit focused on transit-oriented development, policymakers discussed how North Texas’ expanded light rail system can serve as a tool for economic growth.

April 3, 2025 - KERA News

Rusty abandoned oil well and equipment with prickly pear cactus next to it in West Texas.

Using Old Oil and Gas Wells for Green Energy Storage

Penn State researchers have found that repurposing abandoned oil and gas wells for geothermal-assisted compressed-air energy storage can boost efficiency, reduce environmental risks, and support clean energy and job transitions.

March 31, 2025 - Pennsylvania State University

Aerial view of Spanish revival style buildings with red tile roofs in downtown Santa Barbara, California.

Santa Barbara Could Build Housing on County Land

County supervisors moved forward a proposal to build workforce housing on two county-owned parcels.

April 9 - The Santa Barbara Independent

Green and white interstate freeway signs pointing to Hayward and San Mateo and Half Moon Bay exits in Northern California.

San Mateo Formally Opposes Freeway Project

The city council will send a letter to Caltrans urging the agency to reconsider a plan to expand the 101 through the city of San Mateo.

April 9 - Streetsblog San Francisco

Kingsbridge Armory, large hangar-like brick building in the Bronx, New York City with brick lower floors and glass/metal curved roof..

A Bronx Community Fights to Have its Voice Heard

After organizing and giving input for decades, the community around the Kingsbridge Armory might actually see it redeveloped — and they want to continue to have a say in how it goes.

April 9 - Shelterforce Magazine