The design of a healthy ecosystem starts with an understanding of a site’s hydrologic cycle, topography, climate, soil, vegetation, solar aspect, life, and culture. OONA JOHNSEN LANDSCAPE ARCHITECTURE, (OJ-LA) carefully crafts site design around nature and the needs of the human experience while making responsible efforts to conserve natural resources.

OJ-LA has extensive experience with LEED, with a portfolio of projects which have been awarded/ registered with the U.S. Green Building Council (USGBC). With a 15-year background, project experience also includes land restoration, parks, community, educational, health institutions, housing, resorts and hotels, urban design, and commercial developments in Central California, the Bay Area, the Pacific Northwest, and Central Europe. Specialties include sustainable efforts for site development such as Low Impact De­velopment stormwater design strategies, water reuse systems for landscape irrigation, and green roof design and consultation. Special atten­tion is paid to using appropriate native/drought tolerant planting to create a sense of place, promoting native habitat, low maintenance, and a decrease in irrigation potable water demands.


  • Landscape Architectural Design
  • Master Planning
  • Landscape Guidelines: Technical or Reference
  • Community and Stakeholder Participation Events: Lectures / Workshops / Charettes
  • Formal Client Presentations
  • Project Documentation: Concept Design through Construction Documents
  • Construction Administration and Observation

Venetian window made of round glass inserts that whimsically distort the view across a canal.