Margaret Henderson
Landscape Architect
Questa Environmental Design
www.questaec.com
mhenderson@questaec.com

1220 Brickyard Cove #206
Pt. Richmond, CA 94807


Work: 510-236-6114 x206
Cell:
Fax: 510 236-2423
Bio
Licensed Landscape Architect and Landscape Contractor specializing in the design and implementation of Bay-Friendly and sustainable landscapes for public spaces. Habitat restoration, streetscape, stormwater management, permitting and wetlands mitigation design. Water Quality certification and stormwater management planning. Full service firm offering planning, design and implementation services.
Service Types
  • Design
  • Construction
  • Maintenance
Service Areas
  • Alameda County Northern - Albany, Berkeley, Emeryville, Piedmont, etc.
  • Alameda County Central - Alameda, Oakland, San Leandro, Castro Valley, San Lorenzo, etc.
  • Alameda County Southern - Hayward, Union City, Fremont, Newark, Sunol, etc.
  • Contra Costa County Western - El Cerrito, Hercules, Pinole, Richmond, San Pablo, etc.
  • Contra Costa County Central - Concord, Danville, Lafayette, Martinez, Moraga, Orinda, Pleasant Hill, San Ramon, Walnut Creek, etc.
  • Contra Costa County Eastern - Antioch, Brentwood, Oakley, Pittsburgh, etc.
  • Marin County
  • Napa County
  • San Francisco County
  • Santa Clara County Northern - Palo Alto, Mountain View, Sunnyvale, Santa Clara, San Jose, Cupertino, etc.
  • Santa Clara County Southern - Morgan Hill, San Martin, Gilroy, etc.
  • Sonoma County
Specialty Services Provided
    Creating Habitat
    Native Plants
    Drought Tolerant Plants
    Edibles
    Stormwater/Rainwater bioswales, rain gardens, etc.
    Landscape Structures retaining walls, patios, outdoor kitchens, etc.
    Irrigation & Hydrozoning
    Integrated Pest Management
    Soil Analysis & Improvement
    Organic Methods
    Removal of Invasives english ivy, etc.
    Composting and/or Grasscycling
Bay-Friendly Qualifications

MTQ:
Year Qualified: 2009
Year Requalified: 2011
Location: Alameda

Rater:
Year Qualified: 2011
Year Requalified:
Location: Alameda

Advisor:
Year Qualified: 2011
Year Requalified:
Location: Alameda