Scott Lewis Landscape Architecture - SLLA - San Francisco Landscape Architects providing landscape architectural design services, master planning, site planning/design, and construction management. Scott Lewis Landscape Architecture (SLLA) has clients over the entire San Francisco Bay Area, including San Francisco, Napa Valley, Oakland, San Jose, Berkeley, The Peninsula, Hillsborough, Atherton, Palo Alto, Portola Valley, Sausalito, Sebastapol, St. Helena, Marin County, Napa County, Sonoma County, Healdsburg, and the Western United States. Scott R. Lewis, Principal, and the firm’s professional staff have extensive experience in site specific modern garden design, backyard design, front yard landscaping, home gardens, and pool landscapsing, with an emphasis on modern sustainable design. We specialize in creative, professional modern and contemporary design for high-end residential and commercial landscapes, including pools, patios, backyards, gardens, pavers, hardscape, rock gardens, native plantings, retaining walls, walks and walkways, shade and sun plantings, and drought tolerant landscaping.