Spokane Landscape Architect
Evergreen Design Group
Spokane Landscape Architect Services for Developers and Design Teams
Evergreen Design Group provides licensed landscape architecture, land planning, hardscape design, amenity design, and irrigation services for land developers, civil engineers, architects, and design-build contractors working in Spokane and the surrounding Inland Northwest. We have been delivering technical site design and construction documentation since 2005, and we understand what makes the Spokane development environment distinct from other Washington markets — its semi-arid climate, its aquifer-driven water quality obligations, its rapid suburban growth corridors, and a stormwater regulatory framework that is specific to eastern Washington and differs materially from the western side of the Cascades.
Spokane’s landscape architecture requirements are not well served by practitioners whose experience is calibrated to Seattle’s wet maritime climate and western Washington’s regulatory environment. The Inland Northwest operates under different precipitation regimes, different plant adaptation requirements, different irrigation demands, and different stormwater management expectations. Evergreen’s Mountain West practice — built across high-desert, semi-arid, and continental climate environments — is the right fit for what Spokane’s development market actually requires.
Spokane Site Conditions That Drive Design Decisions
Spokane sits in the Inland Northwest — east of the Cascades, in a rain shadow that produces a semi-arid climate fundamentally different from western Washington. The design assumptions that apply in Seattle, Tacoma, or Bellevue do not transfer to Spokane. The following conditions shape every landscape architecture decision we make on Spokane projects.
Semi-Arid Climate and Plant Adaptation
Spokane averages 16 to 17 inches of annual precipitation, with a pronounced dry period from June through September when potential evapotranspiration significantly exceeds rainfall. Summer temperatures regularly exceed 90 degrees Fahrenheit. Winters are cold, with average January lows in the mid-teens and occasional extended cold snaps. This climate profile — hot, dry summers and cold winters — is closer to Boise or the Treasure Valley than to the Puget Sound region. Plant selection for Spokane projects requires species genuinely adapted to this environment: drought-tolerant once established, cold-hardy to USDA Zone 6a or 6b depending on site elevation and cold air drainage, and capable of performing through summer moisture deficits without supplemental irrigation beyond the establishment period. Palettes built for western Washington’s maritime climate will fail in Spokane’s conditions. Evergreen’s Inland Northwest planting palettes are built from the climate realities of the region, not transferred from a wetter or milder practice environment.
Spokane-Rathdrum Prairie Aquifer and Water Quality Obligations
The Spokane-Rathdrum Prairie Aquifer is one of the largest and most productive aquifers in the Pacific Northwest, supplying drinking water to the majority of the Spokane metropolitan area. Its sensitivity to surface contamination is well documented, and its protection is a central organizing principle of Spokane’s stormwater management regulatory framework. Development projects within the aquifer recharge zone — which covers a substantial portion of the Spokane Valley and surrounding areas — are subject to enhanced stormwater infiltration requirements and restrictions on materials and practices that could introduce contaminants to the groundwater system. The Spokane Regional Stormwater Manual incorporates aquifer protection provisions that go beyond standard Washington State Department of Ecology stormwater requirements. Evergreen coordinates with civil engineers on stormwater feature design from the start of Spokane projects, ensuring that infiltration systems, bioretention features, and landscape design within stormwater infrastructure are documented correctly and satisfy both the Spokane Regional Manual and City or County review requirements simultaneously.
Eastern Washington Phase II MS4 and Stormwater Regulatory Framework
Spokane’s municipal stormwater program operates under the Eastern Washington Phase II Municipal Stormwater Permit, which is distinct from the western Washington permit that governs the Puget Sound region. The Eastern Washington permit carries its own low impact development (LID) requirements, post-construction stormwater management standards, and best management practice specifications that are calibrated to eastern Washington’s climate, soils, and hydrology. Landscape features — bioswales, rain gardens, vegetated filter strips, and detention basin planting — that appear in stormwater management plans must be designed and documented to satisfy the Eastern Washington permit framework, not the western Washington standards that practitioners working primarily west of the Cascades will default to. Evergreen’s stormwater landscape coordination is referenced to the correct regulatory framework for every project’s location.
Rapid Suburban Growth and Greenfield Development Pressure
Spokane has been one of the faster-growing metropolitan areas in Washington state over the past decade, with significant residential and commercial development pressure extending through the Spokane Valley corridor, the north Spokane suburban expansion areas around Mead and Colbert, and the south Hill and Cheney corridors. This growth is generating a sustained pipeline of master-planned residential, multifamily, mixed-use, and commercial projects across a range of scales. The development pattern is largely greenfield and suburban, with site conditions that range from flat agricultural land in the valley floor to moderately rolling terrain on the basalt-underlain uplands. Each condition presents its own landscape architecture and irrigation design implications that need to be addressed from site analysis forward.
Spokane has been one of the faster-growing metropolitan areas in Washington state over the past decade, with significant residential and commercial development pressure extending through the Spokane Valley corridor, the north Spokane suburban expansion areas around Mead and Colbert, and the south Hill and Cheney corridors. This growth is generating a sustained pipeline of master-planned residential, multifamily, mixed-use, and commercial projects across a range of scales. The development pattern is largely greenfield and suburban, with site conditions that range from flat agricultural land in the valley floor to moderately rolling terrain on the basalt-underlain uplands. Each condition presents its own landscape architecture and irrigation design implications that need to be addressed from site analysis forward.
Urban Infill and Spokane’s Neighborhood Revitalization Markets
Alongside suburban expansion, Spokane has active urban infill and neighborhood revitalization activity in corridors including the South Perry District, the Garland District, West Central, and areas adjacent to the University District and Gonzaga University. These projects operate under constrained site conditions, existing utility infrastructure, and proximity considerations that require careful existing conditions analysis and site-specific design. The City of Spokane’s design standards and its Complete Streets requirements for pedestrian and streetscape improvements add regulatory context that urban infill projects must address within the landscape architecture scope.
What We Deliver on Spokane Development Projects
Evergreen carries five integrated service lines on Spokane projects. Most engagements involve several running concurrently as a single coordinated package.
Early site organization decisions — open space distribution, circulation hierarchy, buffer placement, phasing logic, and entry design — determine how well a project moves through entitlement and how efficiently it builds. In Spokane, those decisions intersect with City of Spokane and Spokane County zoning and subdivision requirements, stormwater management obligations under the Spokane Regional Stormwater Manual, riparian and shoreline buffer requirements along the Spokane River and its tributary system, and the critical areas ordinance provisions that apply to aquifer recharge zones within the Spokane-Rathdrum Prairie Aquifer footprint. Evergreen’s land planning work is grounded in those constraints from the first study. We develop site configurations that are defensible through municipal review and buildable in the field.
Our core deliverable on most Spokane projects is a complete, permit-ready landscape package: grading and drainage coordinated with civil, planting plans with species appropriate to Spokane’s semi-arid Inland Northwest climate, hardscape design, site amenity layouts, and full construction details. Drawings are CAD-based and coordinated directly with civil and architectural sets to eliminate conflicts before they reach the field. We work across project types — master-planned residential communities, multifamily and mixed-use, commercial and corporate campus, urban infill, and large-lot subdivisions — and across delivery methods including design-bid-build, design-build, and CM at-risk.
Tree preservation requirements are active on infill, redevelopment, and new development projects across Spokane — particularly in established neighborhoods where mature cottonwood, American elm, Norway maple, and ornamental street trees are present on urban lots. Our tree disposition plans document existing trees by species, caliper, and condition; establish tree protection zones per Spokane requirements; assess preservation feasibility relative to proposed grading and utility layouts; and calculate any replacement obligations in the format required for City plan review submittal.
Spokane’s growing residential and mixed-use development market increasingly competes on site experience. Evergreen designs amenity environments as integrated components of the site plan: pools and pool decks, clubhouses and surrounding landscape zones, tot lots, dog parks, fitness courts, shade structures, seating areas, and trail connections coordinated with the broader open space and circulation framework from the start. We produce full construction documentation for amenity areas aligned with your project’s architecture, civil infrastructure, and phasing schedule. See our amenity design services page for scope details and project examples.
Spokane’s climate creates specific hardscape design requirements. Freeze-thaw cycling is significant — Spokane averages over 100 freeze-thaw cycles annually — and base preparation requirements must account for the region’s basalt bedrock in some areas and its variable glacial outwash and loessial soils in others. Paving systems, retaining walls, seat walls, plazas, entry monuments, pedestrian connections, and site furnishings all require specifications calibrated to Spokane’s actual subsurface and climate conditions, not a generic Pacific Northwest standard that reflects western Washington’s milder freeze-thaw profile. Evergreen’s hardscape documentation is fully coordinated with grading, drainage, and utility plans. See our hardscape design services page for scope details and project examples.
Irrigation design is not optional in Spokane — it is a fundamental requirement. With roughly 16 to 17 inches of annual precipitation and a dry summer season that concentrates drought stress during the primary growing period, designed irrigation systems are necessary for plant establishment and long-term landscape performance on virtually every development project. Evergreen provides complete irrigation design services: system hydraulic analysis, mainline and lateral sizing, head-to-head coverage layouts, ET-based controller programming parameters, and drip conversion in appropriate planting zones. We design for the water use efficiency standards embedded in Spokane’s municipal landscape and irrigation ordinances, and for the operational performance your asset management team will need over the life of the project. See our irrigation design services page for scope details and project examples.
Project Types We Support in Spokane
Master-Planned Residential Communities
Spokane’s suburban growth corridors — the Spokane Valley, north Spokane, the south Hill, and emerging development areas in Spokane County — continue to generate master-planned residential projects that require landscape architecture at multiple concurrent scales: master plan open space networks and trail connections, phase-level construction packages released on developer schedules, and detail-level standards for lot treatments, entry monuments, and perimeter buffering. Irrigation design is an integral part of the scope on every one of these projects, not a separate afterthought. Evergreen structures delivery to stay ahead of your construction phasing at all three scales simultaneously.
Multifamily and Mixed-Use Development
Spokane’s urban core and its transit-accessible corridors have seen sustained multifamily and mixed-use investment, driven by population growth, university-adjacent demand, and the ongoing transformation of underutilized commercial corridors. These projects require close coordination between landscape architecture, architecture, civil, and MEP — particularly for constrained urban sites where structured parking, limited open space, and street-level activation compete for the same square footage. Evergreen’s documentation is structured for direct integration with architectural and civil sets, and our specifications are written to CSI MasterFormat for clean incorporation into project manuals.
Commercial and Corporate Campus
Commercial and corporate site development in Spokane involves parking lot landscape compliance under the applicable City or County ordinance, stormwater feature integration with aquifer protection requirements, corporate identity planting in a climate that demands drought-adapted species selections, and ADA-compliant pedestrian circulation. Evergreen carries these scopes within our landscape architecture services and coordinates utility and grading interfaces with civil from the start of the design process, not at plan check submission.
Large-Lot Subdivision
Spokane County and the surrounding area continue to produce large-lot subdivision projects on the suburban and exurban fringe, particularly in areas with rural residential zoning and agricultural land conversion. These projects often involve well and septic systems, critical areas reviews for aquifer recharge zones, and irrigation design that must account for the absence of municipal water service. Evergreen’s approach to large-lot subdivision work in Spokane County accounts for the regulatory overlay of the Spokane-Rathdrum Prairie Aquifer protection provisions and the stormwater management requirements that apply to projects outside the city limits under Spokane County’s stormwater standards.
Urban Infill and Neighborhood Redevelopment
Spokane’s active infill corridors — South Perry, Garland, West Central, the University District periphery — present constrained site conditions, existing utility infrastructure, and neighborhood compatibility requirements that demand existing conditions analysis before design begins. The City of Spokane’s design standards and Complete Streets requirements add pedestrian and streetscape design obligations that are part of the landscape architecture scope on projects with street frontage. Evergreen approaches urban infill with the same documentation rigor as suburban projects, and treats the surrounding neighborhood context as a design input rather than a background constraint.
How We Coordinate with Your Spokane Project Team
Spokane projects require coordination that accounts for the specific regulatory and physical conditions of the Inland Northwest — not a generic Pacific Northwest workflow that was designed for western Washington’s conditions. The aquifer protection overlay, the Eastern Washington stormwater permit framework, the irrigation design requirements of a semi-arid climate, and the City-versus-County review split all create coordination touchpoints that need to be managed from the start of a project, not resolved at plan check.
Our standard coordination protocol on Spokane projects includes:
- Jurisdiction-specific code review for City of Spokane or applicable Spokane County municipality before design begins
- Critical areas and aquifer recharge zone review tied to the civil base before site organization decisions are made
- Stormwater feature coordination with civil referenced to the Spokane Regional Stormwater Manual and Eastern Washington Phase II MS4 permit requirements
- Irrigation design initiated concurrently with planting design — not after — given the fundamental role of irrigation in Spokane’s semi-arid environment
- Coordinated CAD file exchange with civil and architectural teams at defined milestone intervals
- Utility conflict review before hardscape and planting plans are finalized
- Submittal packages structured for City of Spokane or Spokane County review checklists and formats
- Construction administration support to resolve field conditions without derailing the schedule
We work as an embedded member of the project team. Direct coordination between your civil lead and our team on stormwater features, grading transitions, and irrigation infrastructure is standard, not the exception.
FAQ: Spokane Landscape Architecture for Developers and Design Teams
Is Evergreen Design Group licensed to practice landscape architecture in Washington State?
Yes. Evergreen Design Group holds landscape architecture licensure in multiple states and operates nationally. Our team is qualified to stamp and seal landscape architecture documents for Spokane and statewide Washington projects. Contact us directly to confirm applicable credentials for your specific project scope and jurisdiction.
How does Evergreen’s approach differ for Spokane versus western Washington projects?
The differences are substantive, not cosmetic. Spokane’s semi-arid climate requires planting palettes built for drought tolerance and cold hardiness in USDA Zone 6a/6b — not the maritime-adapted species that perform well in Seattle’s mild, wet environment. Irrigation design is a primary scope item in Spokane rather than a secondary consideration. Stormwater management is governed by the Eastern Washington Phase II MS4 permit and the Spokane Regional Stormwater Manual rather than the western Washington permit. The aquifer protection overlay creates stormwater infiltration and materials requirements with no equivalent west of the Cascades. Evergreen’s Mountain West practice is calibrated to these conditions. We do not apply a Puget Sound framework to an Inland Northwest project.
How does the Spokane-Rathdrum Prairie Aquifer protection overlay affect landscape architecture scope?
Within the aquifer recharge zone, stormwater management requirements emphasize infiltration rather than detention and discharge. This affects the design of stormwater features within the landscape — bioretention cells, infiltration swales, and permeable paving systems must be designed and documented to meet the Spokane Regional Stormwater Manual’s aquifer-specific provisions. It also affects materials selection for hardscape and soil amendment specifications where groundwater contamination potential is a consideration. Evergreen coordinates with civil on these requirements from the start of design so that the landscape and stormwater documentation move through review together rather than creating conflicts at plan check.
Can Evergreen handle both City of Spokane and Spokane County projects?
Yes. Evergreen serves the full Spokane metropolitan area, including projects within the City of Spokane, Spokane Valley, Spokane County, and the surrounding municipalities and unincorporated areas. City of Spokane projects move through the City’s development services process under the Spokane Municipal Code. Spokane County projects operate under the County’s zoning and subdivision regulations. Each jurisdiction carries its own landscape requirements, and we build a jurisdiction-specific code review into every project from the start.
How does Evergreen approach irrigation design on Spokane projects?How does Evergreen approach irrigation design on Spokane projects?
Irrigation design in Spokane starts at the same time as planting design — not after. Given that 16 to 17 inches of annual precipitation and a dry summer season make supplemental irrigation a functional necessity rather than an amenity, the irrigation system is a primary infrastructure component of the landscape, not an add-on. Our irrigation scope includes hydraulic analysis, mainline and lateral sizing, head-to-head coverage layouts, ET-based controller parameters, and drip conversion in appropriate zones. We coordinate water meter sizing and point-of-connection with civil early in the design process so that infrastructure decisions are made before they become constraints.
What does a standard Spokane landscape architecture construction document package include?
A standard CD package includes: existing conditions and demolition plan, grading and drainage plan coordinated with civil, layout and materials plan, planting plan with plant schedule, irrigation plan with hydraulic calculations, site details and specifications, and jurisdiction-specific documentation required for City of Spokane or Spokane County plan check. On projects with stormwater landscape features, the package includes stormwater planting schedules and bioretention or infiltration feature details coordinated with the civil drainage design. Deliverables are defined explicitly in the proposal based on your project scope.
Does Evergreen work across the broader Inland Northwest, or only within Spokane?
Evergreen serves the full Spokane metropolitan area and the broader Inland Northwest as part of our nationally licensed practice. Our Mountain West experience across semi-arid and high-desert environments — including the Treasure Valley, the broader Pacific Northwest, and the Intermountain West — is directly applicable to the Inland Northwest’s climate and site conditions. When the Washington state page is live, it will provide a broader overview of our statewide Washington practice. See our Washington landscape architect page.
Work With a Spokane Landscape Architect Who Knows the Inland Northwest
Evergreen Design Group has been supporting development project teams since 2005. Our Spokane landscape architecture practice is built around the conditions that actually govern project outcomes in the Inland Northwest — semi-arid climate and plant adaptation requirements, aquifer protection stormwater obligations, the Eastern Washington regulatory framework, rapid suburban growth dynamics, and the active urban infill market that distinguishes Spokane from most markets its size.
If you have a Spokane project in planning, entitlement, or design development, contact us to discuss scope. We will tell you directly what we can contribute and what engagement looks like for your specific project.
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