Landscape Architects in Oregon

Oregon operates under one of the most structured land use planning systems in the United States. The state's 19 Statewide Planning Goals — established under Oregon Revised Statutes — govern how land is developed, and local comprehensive plans and zoning codes must comply with these goals. Urban growth boundaries (UGBs) are a central component of this system, defining where urban development can occur and creating a clear boundary between developable and rural land.

For development teams, this means that landscape architecture during the entitlement phase must be developed with a clear understanding of applicable Goals — particularly Goal 5 (Natural Resources), Goal 6 (Air, Water, and Land Quality), Goal 7 (Natural Hazards), and Goal 8 (Recreational Needs). We work within this framework and design land plans that support the Goal compliance documentation that Oregon jurisdictions require.

Development projects in Oregon are subject to Oregon Department of Environmental Quality (DEQ) stormwater permitting requirements under the 1200-C and 1200-CN permits, as well as local stormwater management plans that implement MS4 permit requirements. These requirements drive significant landscape architecture scope — stormwater management on Oregon development sites increasingly relies on green infrastructure approaches including bioswales, vegetated swales, stormwater planters, permeable pavement, and infiltration facilities.

We coordinate directly with civil engineers of record on stormwater design — ensuring our landscape architecture documents support the green infrastructure components of the civil stormwater management plan rather than creating conflicts during agency review. Bioswale sizing, vegetated facility edge treatment, planting within stormwater facilities, and coordination of landscape and civil grading documents are areas where our work overlaps directly with civil scope, and we manage that coordination proactively.

The Cascade Range divides Oregon into two fundamentally different climate and landscape environments, and designing for one requires a different approach than designing for the other.

Western Oregon — the Willamette Valley, the coast, and the southwest — receives significant annual rainfall, has predominantly mild temperatures, and supports a rich native plant palette. Design challenges in western Oregon center on managing excess moisture, designing for saturated soils, selecting species that perform in low-light and high-humidity conditions, and meeting the green infrastructure expectations that are embedded in the planning cultures of Portland, Salem, Eugene, and their surrounding jurisdictions.

Eastern Oregon — the high desert, the Columbia Plateau, the Great Basin, and the eastern Cascades — is a fundamentally different environment. Annual precipitation is low, summer temperatures are high, wind exposure is significant, and irrigation is essential for most landscape plantings. Design priorities shift to drought tolerance, efficient water use, wind-resistant species and hardscape detailing, and plant establishment strategies suited to arid conditions.

Our landscape architects design to site-specific conditions throughout Oregon — not to a single statewide approach. We discuss regional conditions with your team upfront and ensure the design strategy reflects the actual environment of your project location.

Oregon's development culture has a strong expectation of native and regionally appropriate planting, and many jurisdictions have moved beyond expectation to requirement. Portland's Green Factor, the City of Eugene's tree and landscaping standards, and a range of county-level requirements across the state reflect a planning culture that treats native planting, pollinator habitat, and water-wise landscaping as baseline expectations — not optional enhancements.

We design planting plans that meet these standards without sacrificing constructability or long-term maintenance practicality. Native species are selected for site suitability and field performance — not just regulatory compliance — and planting designs are developed in coordination with irrigation and grading to support successful establishment.

Oregon's soils vary significantly across its geographic regions. The Willamette Valley is characterized by deep, productive agricultural soils that can present drainage challenges on development sites — heavy clay content is common, and construction activity often compacts subsoils in ways that affect planting establishment and surface drainage performance. Coastal soils tend to be sandy and highly leached. Eastern Oregon soils range from volcanic in the Cascades to alkaline and caliche-affected in the high desert.

We incorporate soil conditions into every phase of design, and coordinate with geotechnical and civil engineers when subsurface data is available. Soil conditions directly affect planting palette, irrigation sizing, drainage system design, and hardscape subgrade specification — and we address them explicitly rather than designing to generic assumptions.