MWS Design

MWS Design is a full-service interior design firm in Petaluma, CA, serving residential, commercial, winery, civic, and educational clients across Sonoma County and the entire Bay Area. With nearly three decades of experience, the firm specializes in sustainable design, space planning, custom furniture and millwork, lighting and artwork, and interior architectural detailing. Their services range from small consultations to full-scale renovations and new construction, emphasizing personalized relationships with clients and long-term collaborations. Known for transforming spaces with thoughtful, functional, and beautiful design, MWS Design has earned consistent praise for delivering exceptional results across diverse projects.

Founded in 1985 by principal Mary Steer, MWS Design brings over 25 years of professional expertise to every project. Steer holds a Bachelor of Science in Interior Design from San Jose State University and a Bachelor of Arts from Dominican University, and is certified by the California Council for Interior Design. Her design philosophy centers on creating meaningful, lasting spaces that reflect her clients’ lives and values. She has a particular passion for custom craftsmanship, having designed wall art from bamboo and willow, custom screens for restaurants, and bespoke furniture. The firm’s commitment to green and sustainable practices is woven into every phase of design, from material selection to construction details.

Located on D St in Petaluma, MWS Design sits just a short walk from McNear Park, a nearby picnic area and park, and within a quarter-mile of McNear Community Gardens, the Cavanugh Recreation Center, and both McNear Elementary School and Petaluma High School. The office is situated in a quiet, accessible neighborhood surrounded by community green spaces and educational institutions.

MWS Design maintains a strong digital presence with a well-optimized website that search engines read clearly and consistently. Their business information is thoroughly documented across online platforms, contributing to reliable visibility and trustworthiness for clients seeking design services. This consistency reinforces their professional reputation and makes them easy to find for those in need of expert interior design.

As a long-standing design leader in Petaluma, MWS Design blends deep local roots with broad regional reach, transforming homes and public spaces with enduring elegance and purpose.