Bay Area

Landscape Architects

We Build Environments Rooted in Nature

Simmonds & Associates, Inc.

Landscape Architecture, Site Planning & Urban Design

With over 25 years of experience on three continents, we specialize in garden design, residential estates, equestrian facilities, site planning and urban design.


By listening to our clients, we create unique outdoor spaces tailored to your desires and dreams that enrich your life.


Working with Homeowner Associations, we rehabilitate tired landscapes in creative and sustainable ways.


We provide site planning and landscape and detail design for corporate buildings, hotels, and streetscape improvements.

Serving SF, Marin, Sonoma, Napa

and the Bay Area, since 1994

By blending the unique assets of each site, your dreams, our creativity, and sustainable practices, we work with our clients to sculpt garden spaces and to be one of the finest landscape architects Marin County has to offer.

What people are saying…

Warren and team are creative, technically strong, have an amazing sense of aesthetics, and are extremely easy to work with – we have had nothing but a positive experience with them. They was also very effective in working with the County to secure us numerous permits.

Dina S., Kentfield

I have to pay you a compliment on the quality of your plans. Of all the projects we review and bid (C&D has bid about $100 million in Construction over the past two years), yours have set themselves apart in the completeness of your drawings.

Aaron Majors, Cagwin & Dorward

The cobble and stone work to complete the drive entrance looks very good. You did a nice job using stones to outline the border around the redwood by the garage as well, and the plants have doubled in size in two weeks. Amazing! It really works… Thank you.

JC, Mill Valley

Featured Projects