Key Concepts

Understanding housing policy requires familiarity with the terms, frameworks, and trade-offs that shape the debate. This section explains key concepts that appear throughout Oregon’s housing policy landscape—from land use boundaries to market dynamics—so readers can engage with legislation, data, and analysis on a stronger footing.

• Urban Growth Boundary — The zoning border around every Oregon city that separates urban from rural land, promoting density while constraining outward expansion.
• Greenfield vs. Brownfield — The distinction between building on undeveloped land (greenfield) versus redeveloping previously used sites (brownfield), and how Oregon regulates each.
• Naturally Affordable Housing — Housing that is affordable through market forces rather than subsidies, and why its preservation depends on building enough new supply.