Portland Council Votes to Expand Affordable Housing Requirement on New Development

Portland's city council passed a revised inclusionary zoning ordinance on Wednesday that will require developers to set aside 20 percent of units as affordable housing in residential projects of 20 units or more. The 7-2 vote marks the first major update to the city's affordability requirements in eight years and comes as median rent in Portland has climbed 34 percent since 2018, according to the city's housing department.

The policy requires developers to keep designated units affordable for 30 years, with monthly rents capped at 80 percent of the area median income. For a one-bedroom apartment, that translates to roughly $1,240 monthly under current income thresholds. Developers retain three alternatives: build the affordable units on-site, contribute to the city's affordable housing fund, or preserve existing affordable stock elsewhere in the city.

What the rule means for Portland renters and homebuyers

For Portland residents navigating the rental market, the ordinance is expected to add roughly 800 below-market apartments over the next decade based on current development pipeline data reviewed by council staff. That increase would represent about 3 percent growth in the city's affordable rental stock, which currently totals 26,400 units according to the housing authority's 2025 inventory.

The policy will directly affect anyone looking to rent in new apartment complexes. Under the old rule, which required 15 percent affordability, a 100-unit building would have included 15 affordable units. That same building under the new ordinance will now include 20 affordable units. Tenants earning between $39,000 and $52,000 annually, which falls roughly into the 80 percent AMI bracket for the Portland metro area, will have access to these restricted units when they become available.

For property developers and construction contractors, the mandate will shift project economics. City staff estimates the increased requirement adds approximately $1.2 million in costs per 100-unit project when affordable units are built on-site rather than funded through the contribution option. The contribution alternative allows developers to pay $185,000 per affordable unit foregone into the city's dedicated housing fund, giving them flexibility in project design.

How Portland compares to nearby cities

Portland's 20 percent requirement now aligns with inclusionary policies in Seattle and San Francisco but exceeds the 15 percent rule still in place in Eugene. Vancouver, British Columbia requires 20 percent on city-owned or partnered land and 10 percent on private development. The 30-year affordability period in Portland matches Seattle's standard but exceeds San Francisco's requirement of 25 years, meaning Portland's commitment extends longer into the future.

Council members noted during debate that rising development costs and labor shortages have made affordability harder to achieve without public subsidy. The city committed $3.2 million annually from general revenue to support the program through purchase of deed restrictions and gap financing for nonprofit developers.

The ordinance takes effect January 1, 2027. Projects with approved permits before that date may continue under the old 15 percent requirement. Developers currently in preliminary stages have until year-end to submit full applications and lock in the lower threshold, city planners said. The city council will review implementation and outcomes in 2029.