As Colorado cities consider their next moves, Portland shows how zoning reform can deliver more homes and more choices through gentle incremental housing development.

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The big concerns? Overdevelopment, neighborhood character, displacement.
The outcomes so far?
✅Steady, modest production
✅Distributed across neighborhoods
✅No overconcentration in areas vulnerable to displacement
✅No increase in demolitions, and >2x as many homes built per demolition

Portland legalized smaller homes—like duplexes, triplexes, and cottage clusters—on most residential lots. 3 years in, this shift has led to hundreds of new homes per year in walkable neighborhoods, selling for $100s of thousands less than single detached houses.